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83862406
|
10.1007/JHEP08(2017)136
|
We obtain exact expressions for a general class of correlation functions in
the 1D quantum mechanical model described by the Schwarzian action, that arises
as the low energy limit of the SYK model. The answer takes the form of an
integral of a momentum space amplitude obtained via a simple set of
diagrammatic rules. The derivation relies on the precise equivalence between
the 1D Schwarzian theory and a suitable large $c$ limit of 2D Virasoro CFT. The
mapping from the 1D to the 2D theory is similar to the construction of
kinematic space. We also compute the out-of-time ordered four point function.
The momentum space amplitude in this case contains an extra factor in the form
of a crossing kernel, or R-matrix, given by a 6j-symbol of SU(1,1). We argue
that the R-matrix describes the gravitational scattering amplitude near the
horizon of an AdS${}_2$ black hole. Finally, we discuss the generalization of
some of our results to ${\cal N}=1$ and ${\cal N}=2$ supersymmetric Schwarzian
QM.Comment: 46 pages + appendices. v2: typos corrected, references added. v3:
matches published versio
|
Solving the Schwarzian via the Conformal Bootstrap
|
solving the schwarzian via the conformal bootstrap
|
expressions schwarzian arises model. answer diagrammatic rules. derivation relies precise equivalence schwarzian virasoro cft. kinematic space. ordered function. extra crossing kernel symbol argue describes gravitational horizon hole. generalization supersymmetric schwarzian pages appendices. typos corrected added. matches versio
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non_dup
|
[] |
84331929
|
10.1007/JHEP08(2017)137
|
We study the transverse momentum spectrum of dilepton produced in the
unpolarized $\pi^- N$ Drell-Yan process, using transverse momentum dependent
factorization up to next-to-logarithmic order of QCD. We extract the
nonperturbative Sudakov form factor for the pion in the evolution formalism of
the unpolarized TMD distribution function, by fitting the experimental data
collected by the E615 Collaboration at Fermilab. With the extracted Sudakov
factor, we calculate the normalized differential cross section with respect to
transverse momentum of the dimuon and compare it with the recent measurement by
the COMPASS Collaboration.Comment: 17 pages, 3 figure
|
Transverse momentum spectrum of dilepton pair in the unpolarized
$\pi^-N$ Drell-Yan process within TMD factorization
|
transverse momentum spectrum of dilepton pair in the unpolarized $\pi^-n$ drell-yan process within tmd factorization
|
dilepton unpolarized drell factorization logarithmic qcd. extract nonperturbative sudakov pion formalism unpolarized fitting fermilab. sudakov dimuon compass pages
|
non_dup
|
[] |
83866917
|
10.1007/JHEP08(2017)138
|
We study Heterotic supergravity on Hyper-Kahler manifolds in the presence of
non-trivial warping and three form flux with Abelian bundles in the large
charge limit. We find exact, regular solutions for multi-centered
Gibbons-Hawking spaces and Atiyah-Hitchin manifolds. In the case of
Atiyah-Hitchin, regularity requires that the circle at infinity is of the same
order as the instanton number, which is taken to be large. Alternatively there
may be a non-trivial density of smeared five branes at the bolt.Comment: 19 page
|
Heterotic Hyper-Kahler Flux Backgrounds
|
heterotic hyper-kahler flux backgrounds
|
heterotic supergravity hyper kahler manifolds trivial warping abelian bundles limit. centered gibbons hawking atiyah hitchin manifolds. atiyah hitchin regularity circle infinity instanton large. alternatively trivial smeared branes
|
non_dup
|
[] |
78511712
|
10.1007/JHEP08(2017)139
|
Tests of the integrality properties of a scalar operator in topological
strings on a resolved conifold background or orientifold of conifold
backgrounds have been performed for arborescent knots and some non-arborescent
knots. The recent results on polynomials for those knots colored by SU(N) and
SO(N) adjoint representations are useful to verify Marino's integrality
conjecture up to two boxes in the Young diagram. In this paper, we review the
salient aspects of the integrality properties and tabulate explicitly for an
arborescent knot and a link. In our knotebook website, we have put these
results for over 100 prime knots available in Rolfsen table and some links. The
first application of the obtained results, an observation of the Gaussian
distribution of the LMOV invariants is also reported.Comment: 28 page
|
Checks of integrality properties in topological strings
|
checks of integrality properties in topological strings
|
integrality topological strings resolved conifold orientifold conifold backgrounds arborescent knots arborescent knots. polynomials knots colored adjoint representations verify marino integrality conjecture boxes diagram. salient integrality tabulate explicitly arborescent knot link. knotebook website prime knots rolfsen links. lmov invariants
|
non_dup
|
[] |
83855126
|
10.1007/JHEP08(2017)140
|
In the context of the Bank-Fishler-Shenker-Susskind Matrix theory, we analyze
a spherical membrane in light-cone M theory along with two asymptotically
distant probes. In the appropriate energy regime, we find that the membrane
behaves like a smeared Matrix black hole; and the spacetime geometry seen by
the probes can become non-commutative even far away from regions of Planckian
curvature. This arises from non-linear Matrix interactions where fast matrix
modes lift a flat direction in the potential -- akin to the Paul trap
phenomenon in atomic physics. In the regime where we do have a notion of
emergent spacetime, we show that there is non-zero entanglement entropy between
supergravity modes on the membrane and the probes. The computation can easily
be generalized to other settings, and this can help develop a dictionary
between entanglement entropy and local geometry -- similar to Ryu-Takayanagi
but instead for asymptotically flat backgrounds.Comment: 42 pages, 3 figures. arXiv admin note: text overlap with
arXiv:1601.07791; v2: minor typo correction
|
Emergent spacetime & Quantum Entanglement in Matrix theory
|
emergent spacetime & quantum entanglement in matrix theory
|
bank fishler shenker susskind analyze spherical cone asymptotically distant probes. behaves smeared spacetime probes commutative away planckian curvature. arises lift akin paul trap phenomenon physics. notion emergent spacetime entanglement supergravity probes. settings dictionary entanglement takayanagi asymptotically pages figures. admin overlap minor typo
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non_dup
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[] |
73422478
|
10.1007/JHEP08(2017)141
|
We introduce a general class of toy models to study the quantum
information-theoretic properties of black hole radiation. The models are
governed by a set of isometries that specify how microstates of the black hole
at a given energy evolve to entangled states of a tensor product
black-hole/radiation Hilbert space. The final state of the black hole radiation
is conveniently summarized by a tensor network built from these isometries. We
introduce a set of quantities generalizing the Renyi entropies that provide a
complete set of bipartite/multipartite entanglement measures, and give a
general formula for the average of these over initial black hole states in
terms of the isometries defining the model. For models where the dimension of
the final tensor product radiation Hilbert space is the same as that of the
space of initial black hole microstates, the entanglement structure is
universal, independent of the choice of isometries. In the more general case,
we find that models which best capture the "information-free" property of black
hole horizons are those whose isometries are tensors corresponding to states of
tripartite systems with maximally mixed subsystems.Comment: 22 pages, 4 figure
|
Tensor Network Models of Unitary Black Hole Evaporation
|
tensor network models of unitary black hole evaporation
|
theoretic radiation. governed isometries specify microstates evolve entangled hilbert space. conveniently summarized built isometries. quantities generalizing renyi entropies bipartite multipartite entanglement isometries defining model. hilbert microstates entanglement universal isometries. capture horizons isometries tensors tripartite maximally pages
|
non_dup
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[] |
83838941
|
10.1007/JHEP08(2017)142
|
We investigate a recently proposed UV-complete composite Higgs scenario in
the light of the first LHC runs. The model is based on a $SU(4)$ gauge group
with global flavour symmetry breaking $SU(5) \to SO(5)$, giving rise to pseudo
Nambu-Goldstone bosons in addition to the Higgs doublet. This includes a real
and a complex electroweak triplet with exotic electric charges. Including
these, as well as constraints on other exotic states, we show that LHC
measurements are not yet sensitive enough to significantly constrain the
model's low energy constants. The Higgs potential is described by two
parameters which are on the one hand constrained by the LHC measurement of the
Higgs mass and Higgs decay channels and on the other hand can be computed from
correlation functions in the UV-complete theory. Hence to exclude the model at
least one constant needs to be determined and to validate the Higgs potential
both constants need to be reproduced by the UV-theory. Due to its
UV-formulation, a certain number of low energy constants can be computed from
first principle numerical simulations of the theory formulated on a lattice,
which can help in establishing the validity of this model. We assess the
potential impact of lattice calculations for phenomenological studies, as a
preliminary step towards Monte Carlo simulations.Comment: 12 pages, 6 figure
|
A UV Complete Compositeness Scenario: LHC Constraints Meet The Lattice
|
a uv complete compositeness scenario: lhc constraints meet the lattice
|
composite runs. flavour breaking giving pseudo nambu goldstone bosons doublet. electroweak triplet exotic charges. exotic constrain constants. constrained theory. exclude validate reproduced theory. formulation formulated establishing validity model. phenomenological preliminary monte carlo pages
|
non_dup
|
[] |
24971286
|
10.1007/JHEP08(2017)144
|
We examine how generalised geometries can be associated with a labelled
Dynkin diagram built around a gravity line. We present a series of new
generalised geometries based on the groups
$\mathit{Spin}(d,d)\times\mathbb{R}^+$ for which the generalised tangent space
transforms in a spinor representation of the group. In low dimensions these all
appear in subsectors of maximal supergravity theories. The case $d=8$ provides
a geometry for eight-dimensional backgrounds of M theory with only seven-form
flux, which have not been included in any previous geometric construction. This
geometry is also one of a series of "half-exceptional" geometries, which
"geometrise" a six-form gauge field. In the appendix, we consider examples of
other algebras appearing in gravitational theories and give a method to derive
the Dynkin labels for the "section condition" in general. We argue that
generalised geometry can describe restrictions and subsectors of many
gravitational theories.Comment: 42 pages, v2: minor improvements and changes, published versio
|
Subsectors, Dynkin Diagrams and New Generalised Geometries
|
subsectors, dynkin diagrams and new generalised geometries
|
examine generalised geometries labelled dynkin built line. generalised geometries mathit mathbb generalised tangent transforms spinor group. subsectors maximal supergravity theories. eight backgrounds seven geometric construction. exceptional geometries geometrise field. algebras appearing gravitational derive dynkin labels general. argue generalised restrictions subsectors gravitational pages minor improvements versio
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non_dup
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[] |
83866655
|
10.1007/JHEP08(2017)145
|
We analyze the flavor structure of composite vector bosons arising in a model
of vectorlike technicolor, often called hypercolor (HC), with eight flavors
that form a one-family content of HC fermions. Dynamics of the composite vector
bosons, referred to as HC rho in this paper, are formulated together with HC
pions by the hidden local symmetry (HLS), in a way analogous to QCD vector
mesons. Then coupling properties to the standard model (SM) fermions, which
respect the HLS gauge symmetry, are described in a way that couplings of the HC
rhos to the left-handed SM quarks and leptons are given by a well-defined setup
as taking the flavor mixing structures into account. Under the present
scenario, we discuss significant bounds on the model from electroweak precision
tests, flavor physics, and collider physics. We also try to address B anomalies
in processes such as B -> K(*) mu+ mu- and B -> D(*) tau nu, recently reported
by LHCb, Belle, (ATLAS, and CMS in part.) Then we find that the present model
can account for the anomaly in B -> K(*) mu+ mu- consistently with the other
constraints while it predicts no significant deviations in B -> D(*) tau nu
from the SM, which can be examined in the future Belle II experiment. The
former is archived with the form C9 = -C10 of the Wilson coefficients for
effective operators of b -> s mu+ mu-, which has been favored by the recent
experimental data. We also investigate current and future experimental limits
at the Large Hadron Collider (LHC) and see that possible collider signals come
from dijet and ditau, or dimuon resonant searches for the present scenario with
TeV mass range. To conclude, the present b -> s mu+ mu- anomaly is likely to
imply discovery of new vector bosons in the ditau or dimuon channel in the
context of the HC rho model. Our model can be considered as a UV completion of
conventional U(1)' model.Comment: 62 pages, 8 figures, 3 tables, typos modified, published versio
|
Phenomenology of flavorful composite vector bosons in light of $B$
anomalies
|
phenomenology of flavorful composite vector bosons in light of $b$ anomalies
|
analyze flavor composite bosons arising vectorlike technicolor hypercolor eight flavors fermions. composite bosons referred formulated pions hidden analogous mesons. fermions couplings rhos handed quarks leptons setup flavor account. bounds electroweak precision flavor collider physics. anomalies lhcb belle atlas part. anomaly consistently predicts deviations belle experiment. former archived wilson favored data. hadron collider collider come dijet ditau dimuon resonant searches range. anomaly imply discovery bosons ditau dimuon model. completion pages tables typos versio
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non_dup
|
[] |
84090760
|
10.1007/JHEP08(2017)146
|
In this paper, we explore supersymmetric and 2d analogs of the SYK model. We
begin by working out a basis of (super)conformal eigenfunctions appropriate for
expanding a four-point function. We use this to clarify some details of the 1d
supersymmetric SYK model. We then introduce new bosonic and supersymmetric
analogs of SYK in two dimensions. These theories consist of $N$ fields
interacting with random $q$-field interactions. Although models built entirely
from bosons appear to be problematic, we find a supersymmetric model that flows
to a large $N$ CFT with interaction strength of order one. We derive an
integral formula for the four-point function at order $1/N$, and use it to
compute the central charge, chaos exponent and some anomalous dimensions. We
describe a problem that arises if one tries to find a 2d SYK-like CFT with a
continuous global symmetry.Comment: 93+12 page
|
More on Supersymmetric and 2d Analogs of the SYK Model
|
more on supersymmetric and 2d analogs of the syk model
|
explore supersymmetric analogs model. begin super conformal eigenfunctions expanding function. clarify supersymmetric model. bosonic supersymmetric analogs dimensions. consist interacting interactions. built entirely bosons problematic supersymmetric flows one. derive chaos exponent anomalous dimensions. arises tries
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non_dup
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[] |
83856316
|
10.1007/JHEP08(2017)147
|
Motivated by AdS/CFT, we address the following outstanding question in large
$N$ conformal field theory: given the appearance of a single-trace operator in
the ${\cal O}\times{\cal O}$ OPE of a scalar primary ${\cal O}$, what is its
total contribution to the vacuum four-point function $\langle {\cal O}{\cal
O}{\cal O}{\cal O}\rangle$ as dictated by crossing symmetry? We solve this
problem in 4d conformal field theories at leading order in $1/N$. Viewed
holographically, this provides a field theory reconstruction of
crossing-symmetric, four-point exchange amplitudes in AdS$_5$. Our solution
takes the form of a resummation of the large spin solution to the crossing
equations, supplemented by corrections at finite spin, required by crossing.
The method can be applied to the exchange of operators of arbitrary twist
$\tau$ and spin $s$, although it vastly simplifies for even-integer twist,
where we give explicit results. The output is the set of OPE data for the
exchange of all double-trace operators $[{\cal O}{\cal O}]_{n,\ell}$. We find
that the double-trace anomalous dimensions $\gamma_{n,\ell}$ are negative,
monotonic and convex functions of $\ell$, for all $n$ and all $\ell>s$. This
constitutes a holographic signature of bulk causality and classical dynamics of
even-spin fields. We also find that the "derivative relation" between
double-trace anomalous dimensions and OPE coefficients does not hold in
general, and derive the explicit form of the deviation in several cases.
Finally, we study large $n$ limits of $\gamma_{n,\ell}$, relevant for the Regge
and bulk-point regimes.Comment: 34 pages + refs. v2: typos fixe
|
Holographic Reconstruction of AdS Exchanges from Crossing Symmetry
|
holographic reconstruction of ads exchanges from crossing symmetry
|
motivated outstanding conformal appearance trace langle rangle dictated crossing solve conformal viewed holographically reconstruction crossing amplitudes resummation crossing supplemented crossing. twist vastly simplifies integer twist results. trace trace anomalous gamma monotonic convex constitutes holographic signature causality fields. trace anomalous hold derive cases. gamma regge pages refs. typos fixe
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non_dup
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73988700
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10.1007/JHEP08(2018)001
|
In the context of relating AdS/CFT to quantum information theory, we propose
a holographic dual of Fisher information metric for mixed states in the
boundary field theory. This amounts to a holographic measure for the distance
between two mixed quantum states. For a spherical subregion in the boundary we
show that this is related to a particularly regularized volume enclosed by the
Ryu-Takayanagi surface. We further argue that the quantum correction to the
proposed Fisher information metric is related to the quantum correction to the
boundary entanglement entropy. We discuss consequences of this connection.Comment: v3: 28 pages, 1 figure. Accepted for publication in JHEP. Major
update: added section 2.2 which discusses our proposal for states under
scalar perturbations as well. Conclusions unchanged. Typos corrected,
references adde
|
Connecting Fisher information to bulk entanglement in holography
|
connecting fisher information to bulk entanglement in holography
|
relating propose holographic fisher theory. amounts holographic states. spherical subregion regularized enclosed takayanagi surface. argue fisher entanglement entropy. consequences pages figure. publication jhep. update discusses proposal perturbations well. unchanged. typos corrected adde
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non_dup
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129358464
|
10.1007/JHEP08(2018)011
|
A measurement is performed of the cross section of top quark pair production
in association with a W or Z boson using proton-proton collisions at a
center-of-mass energy of 13 TeV at the LHC. The data sample corresponds to an
integrated luminosity of 35.9 fb$^{-1}$, collected by the CMS experiment in
2016. The measurement is performed in the same-sign dilepton, three- and
four-lepton final states. The production cross sections are measured to be
$\sigma(\mathrm{t}\overline{\mathrm{t}}\mathrm{W})= 0.77
^{+0.12}_{-0.11}\text{(stat)} ^{+0.13}_{-0.12}\text{(syst)}$ pb and
$\sigma(\mathrm{t}\overline{\mathrm{t}}\mathrm{Z}) = 0.99
^{+0.09}_{-0.08}\text{(stat)} ^{+0.12}_{-0.10}\text{(syst)}$ pb. The expected
(observed) signal significance for the
$\mathrm{t}\overline{\mathrm{t}}\mathrm{W}$ production in same-sign dilepton
channel is found to be 4.5 (5.3) standard deviations, while for the
$\mathrm{t}\overline{\mathrm{t}}\mathrm{Z}$ production in three- and
four-lepton channels both the expected and the observed significances are found
to be in excess of 5 standard deviations. The results are in agreement with the
standard model predictions and are used to constrain the Wilson coefficients
for eight dimension-six operators describing new interactions that would modify
$\mathrm{t}\overline{\mathrm{t}}\mathrm{W}$ and
$\mathrm{t}\overline{\mathrm{t}}\mathrm{Z}$ production.Comment: Replaced with the published version. Added the journal reference and
the DOI. All the figures and tables, including additional supplementary
figures, can be found at
http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-17-005
(CMS Public Pages
|
Measurement of the cross section for top quark pair production in
association with a W or Z boson in proton-proton collisions at $\sqrt{s} =$
13 TeV
|
measurement of the cross section for top quark pair production in association with a w or z boson in proton-proton collisions at $\sqrt{s} =$ 13 tev
|
boson proton proton collisions lhc. luminosity dilepton lepton states. sigma mathrm overline mathrm mathrm stat syst sigma mathrm overline mathrm mathrm stat syst mathrm overline mathrm mathrm dilepton deviations mathrm overline mathrm mathrm lepton significances excess deviations. constrain wilson eight describing modify mathrm overline mathrm mathrm mathrm overline mathrm mathrm replaced version. doi. tables supplementary publications pages
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non_dup
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162911156
|
10.1007/JHEP08(2018)018
|
We study aspects of 3d N=2 supersymmetric gauge theories on the product of a line and a Riemann surface. Performing a topological twist along the Riemann surface leads to an effective supersymmetric quantum mechanics on the line. We propose a construction of the space of supersymmetric ground states as a graded vector space in terms of a certain cohomology of generalized vortex moduli spaces on the Riemann surface. This exhibits a rich dependence on deformation parameters compatible with the topological twist, including superpotentials, real mass parameters, and background vector bundles associated to flavour symmetries. By matching spaces of supersymmetric ground states, we perform new checks of 3d abelian mirror symmetry
|
Twisted Hilbert spaces of 3d supersymmetric gauge theories.
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twisted hilbert spaces of 3d supersymmetric gauge theories.
|
supersymmetric riemann surface. performing topological twist riemann supersymmetric mechanics line. propose supersymmetric graded cohomology vortex moduli riemann surface. exhibits deformation compatible topological twist superpotentials bundles flavour symmetries. matching supersymmetric checks abelian mirror
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non_dup
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83870620
|
10.1007/JHEP08(2018)020
|
We elaborate on the extended Hilbert space factorization of Chern Simons
theory and show how this arises naturally from a proper regularization of the
entangling surface in the Euclidean path integral. The regularization amounts
to stretching the entangling surface into a co-dimension one surface which
hosts edge modes of the Chern Simons theory when quantized on a spatial
subregion. The factorized state is a regularized Ishibashi state and reproduces
the well known topological entanglement entropies. We illustrate how the same
factorization arises from the glueing of two spatial subregions via the
entangling product defined by Donnelly and Freidel.Comment: Some typos fixe
|
A note on entanglement edge modes in Chern Simons theory
|
a note on entanglement edge modes in chern simons theory
|
elaborate hilbert factorization chern simons arises naturally proper regularization entangling euclidean integral. regularization amounts stretching entangling hosts chern simons quantized subregion. factorized regularized ishibashi reproduces topological entanglement entropies. illustrate factorization arises glueing subregions entangling donnelly typos fixe
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129354030
|
10.1007/JHEP08(2018)021
|
We study how exotic branes, i.e. branes whose tensions are proportional to
$g_s^{-\alpha}$, with $\alpha>2$, are realised in Exceptional Field Theory
(EFT). The generalised torsion of the Weitzenb\"ock connection of the
$\operatorname{SL}(5)$ EFT which, in the language of gauged supergravity
describes the embedding tensor, is shown to classify the exotic branes whose
magnetic fluxes can fit into four internal dimensions. By analysing the weight
diagrams of the corresponding representations of $\operatorname{SL}(5)$ we
determine the U-duality orbits relating geometric and non-geometric fluxes. As
a further application of the formalism we consider the Kaluza-Klein monopole of
11D supergravity and rotate it into the exotic $6^{(3,1)}$-brane.Comment: 38 pages + Appendi
|
Exotic branes in Exceptional Field Theory: the SL(5) duality group
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exotic branes in exceptional field theory: the sl(5) duality group
|
exotic branes i.e. branes tensions alpha alpha realised exceptional generalised torsion weitzenb connection operatorname gauged supergravity describes embedding classify exotic branes fluxes dimensions. analysing diagrams representations operatorname duality orbits relating geometric geometric fluxes. formalism kaluza klein monopole supergravity rotate exotic pages appendi
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129351414
|
10.1007/JHEP08(2018)025
|
With the Higgs search program already quite mature, there is the exciting
possibility of discovering a new particle with rates near that of the SM Higgs.
We consider models with a signal in $\gamma \gamma$ below the SM Higgs mass,
taking the recent $2.9\, \sigma$ (local) CMS excess at 95 GeV as a target. We
discuss singlet models with additional vectorlike matter, but argue that a
Type-I two Higgs doublet model provides a more economical scenario. In such a
setup, going into regions of moderate-to-strong fermiophobia, the enhanced
$\gamma \gamma$ branching ratio allows signals from $VH$+VBF production to
yield $\sigma \times BR_{\gamma\gamma} $ comparable to total SM rates. Light
$H$ production can be dominated via rare top decays $t \rightarrow b H^+
\rightarrow b W^{*} H$, which provides an alternate explanation of the excess.
We consider this in the context of other Higgs anomalies, namely the LEP Higgs
excess near the same mass, and excesses in $t\bar{t}h$ searches at Tevatron and
LHC. We find that with $140\, \mathrm{GeV} < m_{H^+} < 160\, \mathrm{GeV}$,
$\tan \beta \sim 5$ and a coupling to gauge bosons of $\sin^2 \delta \sim 0.1$,
such a scenario can produce all the excesses simultanously, where $tth$ arise
from contamination from the rare top decays, as previously proposed. An
implication of the Type-I scenario is that any $\gamma \gamma$ excess should be
associated with additional elements that could reduce background, including
$b$-jets, forward jets or signs of vector boson production.Comment: 15 pages, 3 figure
|
Light Signals from a Lighter Higgs
|
light signals from a lighter higgs
|
mature exciting discovering higgs. gamma gamma sigma excess target. singlet vectorlike argue doublet economical scenario. setup going moderate fermiophobia gamma gamma branching sigma gamma gamma comparable rates. dominated rare decays rightarrow rightarrow alternate explanation excess. anomalies excess excesses searches tevatron lhc. mathrm mathrm beta bosons delta excesses simultanously arise contamination rare decays proposed. implication gamma gamma excess jets jets signs boson pages
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[] |
146473483
|
10.1007/JHEP08(2018)030
|
Many models of Beyond the Standard Model physics contain particles that are
charged under both Standard Model and Hidden Valley gauge groups, yet very
little effort has been put into establishing their experimental signatures. We
provide a general overview of the collider phenomenology of spin 0 or 1/2
mediators with non-trivial gauge numbers under both the Standard Model and a
single new confining group. Due to the possibility of many unconventional
signatures, the focus is on direct production with semivisible jets. For the
mediators to be able to decay, a global $U(1)$ symmetry must be broken. This is
best done by introducing a set of operators explicitly violating this symmetry.
We find that there is only a finite number of such renormalizable operators and
that the phenomenology can be classified into five distinct categories. We show
that large regions of the parameter space are already excluded, while others
are unconstrained by current search strategies. We also discuss how searches
could be modified to better probe these unconstrained regions by exploiting
special properties of semivisible jets.Comment: 40 pages, 11 figures, published versio
|
Collider phenomenology of Hidden Valley mediators of spin 0 or 1/2 with
semivisible jets
|
collider phenomenology of hidden valley mediators of spin 0 or 1/2 with semivisible jets
|
hidden valley effort establishing signatures. overview collider phenomenology mediators trivial confining group. unconventional signatures semivisible jets. mediators broken. introducing explicitly violating symmetry. renormalizable phenomenology classified categories. excluded unconstrained strategies. searches unconstrained exploiting semivisible pages versio
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146472919
|
10.1007/JHEP08(2018)038
|
We study the supergravity dual of four-dimensional ${\mathcal{N}=1}$
superconformal field theories arising from wrapping M5-branes on a K\"ahler
two-cycle inside a Calabi-Yau threefold. We derive an effective
three-dimensional theory living on the cobordism between the infrared and
ultraviolet Riemann surfaces, describing the renormalization group flows
between AdS$_7$ and AdS$_{5}$ as well as between different AdS$_{5}$ fixed
points. The realization of this system as an effective theory is convenient to
make connections to known theories, and we show that upon imposing (physical)
infrared boundary conditions, the effective three-dimensional theory further
reduces to two-dimensional $SU(2)$ Yang-Mills theory on the Riemann surface,
thus deriving a correspondence between the gravity duals of a class of
$\mathcal{N}=1$ superconformal field theories arising from wrapping M5-branes
on a Riemann surface and two-dimensional Yang-Mills theory on the same Riemann
surface.Comment: 18 pages, 2 figure
|
4d $\mathcal{N} = 1$/2d Yang-Mills Duality in Holography
|
4d $\mathcal{n} = 1$/2d yang-mills duality in holography
|
supergravity mathcal superconformal arising wrapping branes ahler calabi threefold. derive living cobordism infrared ultraviolet riemann describing renormalization flows points. realization convenient connections imposing infrared reduces mills riemann deriving correspondence duals mathcal superconformal arising wrapping branes riemann mills riemann pages
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146475048
|
10.1007/JHEP08(2018)043
|
In this article we discuss the limit $p$ approaches to one of tree-level
$p$-adic open string amplitudes and its connections with the topological zeta
functions. There is empirical evidence that $p$-adic strings are related to the
ordinary strings in the $p \to 1$ limit. Previously, we established that
$p$-adic Koba-Nielsen string amplitudes are finite sums of multivariate Igusa's
local zeta functions, consequently, they are convergent integrals that admit
meromorphic continuations as rational functions. The meromorphic continuation
of local zeta functions has been used for several authors to regularize
parametric Feynman amplitudes in field and string theories. Denef and Loeser
established that the limit $p \to 1$ of a Igusa's local zeta function gives
rise to an object called topological zeta function. By using Denef-Loeser's
theory of topological zeta functions, we show that limit $p \to 1$ of
tree-level $p$-adic string amplitudes give rise to certain amplitudes, that we
have named Denef-Loeser string amplitudes. Gerasimov and Shatashvili showed
that in limit $p \to 1$ the well-known non-local effective Lagrangian
(reproducing the tree-level $p$-adic string amplitudes) gives rise to a simple
Lagrangian with a logarithmic potential. We show that the Feynman amplitudes of
this last Lagrangian are precisely the amplitudes introduced here. Finally, the
amplitudes for four and five points are computed explicitly.Comment: 23 pp. minor changes, Version to be published in JHE
|
On $p$-adic string amplitudes in the limit $p$ approaches to one
|
on $p$-adic string amplitudes in the limit $p$ approaches to one
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adic amplitudes connections topological zeta functions. adic strings ordinary strings limit. adic koba nielsen amplitudes sums multivariate igusa zeta convergent integrals admit meromorphic continuations rational functions. meromorphic continuation zeta regularize parametric feynman amplitudes theories. denef loeser igusa zeta topological zeta function. denef loeser topological zeta adic amplitudes amplitudes named denef loeser amplitudes. gerasimov shatashvili lagrangian reproducing adic amplitudes lagrangian logarithmic potential. feynman amplitudes lagrangian precisely amplitudes here. amplitudes minor
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non_dup
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129353723
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10.1007/JHEP08(2018)046
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In this paper, we initiate the study of holographic renormalization group
flows acting on the metric of four-manifolds. In particular, we derive a set of
equations which govern the evolution of a generic K\"ahler four-manifold along
the renormalization group flow in seven-dimensional gauged supergravity. The
physical eleven-dimensional M-theory setup is given by a stack of M5-branes
wrapping a calibrated K\"ahler four-cycle inside a Calabi-Yau threefold. By
topologically twisting the theory in the ultraviolet, we may choose an
arbitrary K\"ahler metric on the four-cycle as an asymptotic boundary
condition. Along the renormalization group flow, the metric moduli are largely
washed out, and at the infrared fixed point we will reach a K\"ahler-Einstein
metric, which is the expected uniformization behavior.Comment: 42 page
|
K\"ahler Uniformization from Holographic Renormalization Group Flows of
M5-branes
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k\"ahler uniformization from holographic renormalization group flows of m5-branes
|
initiate holographic renormalization flows acting manifolds. derive govern generic ahler manifold renormalization seven gauged supergravity. eleven setup stack branes wrapping calibrated ahler calabi threefold. topologically twisting ultraviolet ahler asymptotic condition. renormalization moduli largely washed infrared ahler einstein uniformization
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195387852
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10.1007/JHEP08(2018)073
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he cold dark matter (CDM) scenario has proved successful in cosmology. However, we lack a fundamental understanding of its microscopic nature. Moreover, the apparent disagreement between CDM predictions and subgalactic-structure observations has prompted the debate about its behaviour at small scales. These problems could be alleviated if the dark matter is composed of ultralight fields m ∼ 10^(−22) eV, usually known as fuzzy dark matter (FDM). Some specific models, with axion-like potentials, have been thoroughly studied and are collectively referred to as ultralight axions (ULAs) or axion-like particles (ALPs). In this work we consider anharmonic corrections to the mass term coming from a repulsive quartic self-interaction. Whenever this anharmonic term dominates, the field behaves as radiation instead of cold matter, modifying the time of matter-radiation equality. Additionally, even for high masses, i.e. masses that reproduce the cold matter behaviour, the presence of anharmonic terms introduce a cut-off in the matter power spectrum through its contribution to the sound speed. We analyze the model and derive constraints using a modified version of class and comparing with CMB and large-scale structure data
|
Constraints on anharmonic corrections of fuzzy dark matter
|
constraints on anharmonic corrections of fuzzy dark matter
|
cold proved successful cosmology. microscopic nature. apparent disagreement subgalactic prompted debate scales. alleviated composed ultralight fuzzy axion potentials thoroughly collectively referred ultralight axions ulas axion alps anharmonic coming repulsive quartic interaction. whenever anharmonic dominates behaves cold modifying equality. additionally i.e. reproduce cold anharmonic sound speed. analyze derive
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162911198
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10.1007/JHEP08(2018)085
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The scattering equation formalism is a general framework for calculation of amplitudes in theories of massless particles. We provide a detailed introduction to the 4D scattering equation framework accessible to non-experts, outline current difficulties solving the equations numerically, and explain how to overcome them with a Monte Carlo algorithm. With this submission we include treeamps4dJAF, the first publicly available Mathematica package for calculating amplitudes by solving the scattering equations, supporting MHV analytical and Nk − 2MHV numerical computations. The package provides a powerful and flexible computational tool for calculating tree-level amplitudes in super Yang Mills theories, Einstein supergravity and conformal supergravity. We tabulate sets of numerical solutions up to 9 points in all MHV sectors and 12 points in the NHMV sector which can be used for fast evaluation of amplitudes
|
A Monte Carlo approach to the 4D scattering equations.
|
a monte carlo approach to the 4d scattering equations.
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formalism amplitudes massless particles. accessible experts outline difficulties solving numerically overcome monte carlo algorithm. submission treeamps djaf publicly mathematica package calculating amplitudes solving supporting computations. package powerful flexible calculating amplitudes super mills einstein supergravity conformal supergravity. tabulate sectors nhmv amplitudes
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162911277
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10.1007/JHEP08(2018)090
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Several important processes and analyses at the LHC are sensitive to higher-order perturbative corrections beyond what can currently be calculated at fixed order. The formalism of High Energy Jets (HEJ) calculates the corrections systematically enhanced for a large ratio of the centre-of-mass energy to the transverse momentum of the observed jets. These effects are relevant in the analysis of e.g. Higgs-boson production in association with dijets within the cuts devised to enhance the contribution from Vector Boson Fusion (VBF).\ud
\ud
HEJ obtains an all-order approximation, based on logarithmic corrections which are matched to fixed-order results in the cases where these can be readily evaluated. In this paper we present an improved framework for the matching utilised in HEJ, which for merging of tree-level results is mathematically equivalent to the one used so far. However, by starting from events generated at fixed order and supplementing these with the all-order summation, it is computationally simpler to obtain matching to calculations of high multiplicity.\ud
\ud
We demonstrate that the impact of the higher-multiplicity matching on predictions is small for the gluon-fusion (GF) contribution of Higgs-boson production in association with dijets in the VBF-region, so perturbative stability against high-multiplicity matching has been achieved within HEJ. We match the improved HEJ prediction to the inclusive next-to-leading order (NLO) cross section and compare to pure NLO in the h → γγ channel with standard VBF cuts
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Higgs-boson plus Dijets : higher-order matching for high-energy predictions.
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higgs-boson plus dijets : higher-order matching for high-energy predictions.
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perturbative order. formalism jets calculates systematically jets. e.g. boson dijets cuts devised enhance boson fusion obtains logarithmic matched readily evaluated. matching utilised merging mathematically far. supplementing summation computationally simpler matching multiplicity. multiplicity matching gluon fusion boson dijets perturbative multiplicity matching hej. match inclusive cuts
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84095195
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10.1007/JHEP08(2018)092
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Whether two boundary conditions of a two-dimensional topological order can be
continuously connected without a phase transition in between remains a
challenging question. We tackle this challenge by constructing an effective
Hamiltonian, describing anyon interaction, that realizes such a continuous
deformation. At any point along the deformation, the model remains a fixed
point model describing a gapped topological order with gapped boundaries. That
the deformation retains the gap is due to the anomaly cancelation between the
boundary and bulk. Such anomaly inflow is quantitatively studied using our
effective Hamiltonian. We apply our method of effective Hamiltonian to the
extended twisted quantum double model with boundaries (constructed by two of us
in Ref.[1]). We show that for a given gauge group $G$ and a three-cocycle in
$H^3[G,U(1)]$ in the bulk, any two gapped boundaries for a fixed subgroup
$K\subseteq G$ on the boundary can be continuously connected via an effective
Hamiltonian. Our results can be straightforwardly generalized to the extended
Levin-Wen model with boundaries (constructed by two of us in Ref.[2].Comment: 5 page
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From effective Hamiltonian to anomaly inflow in topological orders with
boundaries
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from effective hamiltonian to anomaly inflow in topological orders with boundaries
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topological continuously challenging question. tackle challenge constructing describing anyon realizes deformation. deformation describing gapped topological gapped boundaries. deformation retains anomaly cancelation bulk. anomaly inflow quantitatively hamiltonian. twisted boundaries ref. cocycle gapped boundaries subgroup subseteq continuously hamiltonian. straightforwardly levin boundaries ref. .comment
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93957429
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10.1007/JHEP08(2018)093
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We re-examine a string dual model for elastic proton-proton scattering via
Pomeron exchange. We argue that the method of "Reggeizing" a propagator to take
into account an entire trajectory of exchanged particles can be generalized, in
particular by modifying the value of the mass-shell parameter in the model. We
then fit the generalized model to scattering data at large s and small t. The
fitting results are inconclusive, but suggest that a better fit might be
obtained by allowing the mass-shell to vary. The model fits the data equally
well (roughly) for a wide range of values of the mass-shell parameter, but the
other fitting parameters (the slope and intercept of the Regge trajectory, and
the coupling constant and dipole mass from the proton-proton-glueball coupling)
are then inconsistent with what we expect. On the other hand, using the
traditional method of Reggeization generates a weaker fit, but the other
parameters obtain more physically reasonable values. In analyzing the fitting
results, we also found that our model is more consistent with the sqrt(s) =
1800 GeV coming from the E710 experiment than that coming from the CDF
experiment, and that our model has the greatest discrepancy with the data in
the range 0.5 GeV^2 < |t| < 0.6 GeV^2, suggesting that the transition from soft
Pomeron to hard Pomeron may occur closer to t = -0.5 GeV^2 rather than t = -0.6
GeV^2 as previously thought.Comment: 16 pages, 7 figures, 2 table
|
A Second Look at String-Inspired Models for Proton-Proton Scattering via
Pomeron Exchange
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a second look at string-inspired models for proton-proton scattering via pomeron exchange
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examine elastic proton proton pomeron exchange. argue reggeizing propagator trajectory exchanged modifying model. fitting inconclusive allowing vary. fits equally roughly fitting intercept regge trajectory dipole proton proton glueball inconsistent expect. traditional reggeization generates weaker physically reasonable values. analyzing fitting sqrt coming coming greatest discrepancy pomeron pomeron closer pages
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141529204
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10.1007/JHEP08(2018)100
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We analyze the moduli spaces near N=4 supersymmetric AdS4 vacua of string
theory by combining and comparing various approaches: (a) the known exact
solutions of Type IIB string theory with localized 5-brane sourcees, (b) the
holographically dual 3d quiver gauge theories; (c) gauged supergravity, and (d)
the representations of the superconformal algebra Osp(4|4). Short multiplets
containing the marginal N=2 deformations transform in the (2;0), (0;2) or (1;1)
representations of the R-symmetry group SU(2)_H x SU(2)_C. The first two are
classified by the chiral rings of the Higgs and Coulomb branches, while the
latter contain mixed-branch operators. We identify the origin of these moduli
in string theory, matching in particular the operators of the chiral rings with
open strings on the magnetized 5-brane sources. Our results provide new
evidence for the underlying holographic duality. The existence of a large
number of bound-state moduli highlights the limitations of effective
supergravity.Comment: 32 pages, 5 figures. Typos and some incorrect statements have been
corrected which did not affect our analysi
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N=2 Moduli of AdS4 vacua: A fine-print study
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n=2 moduli of ads4 vacua: a fine-print study
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analyze moduli supersymmetric vacua combining localized brane sourcees holographically quiver gauged supergravity representations superconformal multiplets marginal deformations transform representations classified chiral rings coulomb branches branch operators. moduli matching chiral rings strings magnetized brane sources. holographic duality. moduli highlights limitations pages figures. typos incorrect statements corrected analysi
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83854955
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10.1007/JHEP08(2018)108
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We study the twist-field representations of W-algebras and generalize
construction of the corresponding vertex operators to D- and B-series. It is
shown, how the computation of characters of these representations leads to
nontrivial identities involving lattice theta-functions. We also propose a way
to calculate their exact conformal blocks, expressing them for D-series in
terms of geometric data of the corresponding Prym variety for covering curve
with involution.Comment: 55 pages; journal versio
|
Twist-field representations of W-algebras, exact conformal blocks and
character identities
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twist-field representations of w-algebras, exact conformal blocks and character identities
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twist representations algebras generalize series. characters representations nontrivial identities involving theta functions. propose conformal blocks expressing geometric prym covering pages versio
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86414509
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10.1007/JHEP08(2018)114
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Every four-dimensional ${\cal N}=2$ superconformal field theory comes
equipped with an intricate algebraic invariant, the associated vertex operator
algebra. The relationships between this invariant and more conventional
protected quantities in the same theories have yet to be completely understood.
In this work, we aim to characterize the connection between the Higgs branch of
the moduli space of vacua (as an algebraic geometric entity) and the associated
vertex operator algebra. Ultimately our proposal is simple, but its correctness
requires the existence of a number of nontrivial null vectors in the vacuum
Verma module of the vertex operator algebra. Of particular interest is one such
null vector whose presence suggests that the Schur index of any ${\cal N}=2$
SCFT should obey a finite order modular differential equation. By way of the
"high temperature" limit of the superconformal index, this allows the Weyl
anomaly coefficient $a$ to be reinterpreted in terms of the representation
theory of the associated vertex operator algebra. We illustrate these ideas in
a number of examples including a series of rank-one theories associated with
the "Deligne-Cvitanovi\'c exceptional series" of simple Lie algebras, several
families of Argyres-Douglas theories, an assortment of class ${\cal S}$
theories, and ${\cal N}=4$ super Yang-Mills with $\mathfrak{su}(n)$ gauge group
for small-to-moderate values of $n$.Comment: 66 pages. v2: some typos corrected. Added new section 5.4 discussing
an additional family of Argyres-Douglas SCFT
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Vertex operator algebras, Higgs branches, and modular differential
equations
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vertex operator algebras, higgs branches, and modular differential equations
|
superconformal comes equipped intricate algebraic algebra. protected quantities understood. characterize connection branch moduli vacua algebraic geometric entity algebra. ultimately proposal correctness nontrivial verma module algebra. schur scft obey modular equation. superconformal weyl anomaly reinterpreted algebra. illustrate ideas deligne cvitanovi exceptional algebras families argyres douglas assortment super mills mathfrak moderate .comment pages. typos corrected. discussing argyres douglas scft
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187994451
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10.1007/JHEP08(2018)121
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Killing spinor identities relate components of equations of motion to each other for supersymmetric backgrounds. The only input required is the field content and the supersymmetry transformations of the fields, as long as an on-shell supersymmetrization of the action without additional fields exists. If we consider off-shell supersymmetry it is clear that the same relations will occur between components of the equations of motion independently of the specific action considered, in particular the Killing spinor identities can be derived for arbitrary, including higher derivative, supergravities, with a specified matter content. We give the Killing spinor identities for five-dimensional N= 2 ungauged supergravities coupled to Abelian vector multiplets, and then using spinorial geometry techniques so that we have explicit representatives for the spinors, we discuss the particular case of the time-like class of solutions to theories with perturbative corrections at the four derivative level. We also discuss the maximally supersymmetric solutions in the general off-shell case
|
Spinorial geometry, off-shell Killing spinor identities and higher derivative 5D supergravities
|
spinorial geometry, off-shell killing spinor identities and higher derivative 5d supergravities
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killing spinor identities relate supersymmetric backgrounds. supersymmetry transformations supersymmetrization exists. supersymmetry independently killing spinor identities supergravities specified content. killing spinor identities ungauged supergravities abelian multiplets spinorial representatives spinors perturbative level. maximally supersymmetric
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141530417
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10.1007/JHEP08(2018)125
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We provide a description of the quantum integrable structure behind the
Thermodynamic Bethe Ansatz (TBA)-like equation derived by Nekrasov and
Shatashvili (NS) for $\mathcal{N}=2$ 4d Super Yang-Mills (SYM) theories. In
this regime of the background, -- we shall show --, the instanton partition
function is characterised by the solution of a TQ-equation. Exploiting a
symmetry of the contour integrals expressing the partition function, we derive
a 'dual' TQ-equation, sharing the same T-polynomial with the former. This fact
allows us to evaluate to $1$ the quantum Wronskian of two dual solutions (for
$Q$) and, then, to reproduce the NS TBA-like equation. The latter acquires
interestingly the deep meaning of a known object in integrability theory, as
its two second determinations give the usual non-linear integral equations
(nlies) derived from the 'dual' Bethe Ansatz equations.Comment: 21 page
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Quantum integrability of $\mathcal{N}=2$ 4d gauge theories
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quantum integrability of $\mathcal{n}=2$ 4d gauge theories
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integrable behind thermodynamic bethe ansatz nekrasov shatashvili mathcal super mills theories. instanton partition characterised equation. exploiting contour integrals expressing partition derive sharing former. wronskian reproduce equation. acquires interestingly meaning integrability determinations usual nlies bethe ansatz
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93940584
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10.1007/JHEP08(2018)142
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Based on the work of Gao-Jafferis-Wall and Maldacena-Stanford-Yang, we
observe that the time-shifted thermofield states of two entangled CFTs can be
made traversable by an appropriate coupling of the two CFTs, or alternatively
by the application of a modified quantum teleportation protocol. This provides
evidence for the smoothness of the horizon for a large class of entangled
states related to the thermofield by time-translations. The smoothness of these
states has some relevance for the firewall paradox and the proposal that some
observables in quantum gravity may be state-dependent. We notice that quantum
teleportation through these entangled states could be used in a laboratory
setup to implement a time-machine, which allows the observer to travel far in
the future.Comment: 18 page
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Quantum teleportation through time-shifted AdS wormholes
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quantum teleportation through time-shifted ads wormholes
|
jafferis maldacena stanford shifted thermofield entangled cfts traversable cfts alternatively teleportation protocol. smoothness horizon entangled thermofield translations. smoothness relevance firewall paradox proposal observables dependent. notice teleportation entangled setup implement machine observer travel
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141536800
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10.1007/JHEP08(2018)150
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In the present work we search for renormalization group invariant relations
among the various massless and massive parameters of the Minimal Supersymmetric
Standard Model. We find that indeed several of the previously free parameters
of the model can be reduced in favor of few, the unique gauge coupling and the
gaugino mass at the unification scale among them. Taking into account the
various experimental constraints, including the B-physics ones, we predict the
Higgs and the supersymmetric spectrum. We find that the lightest Higgs mass is
in comfortable agreement with the measured value and its experimental and
theoretical uncertainties, while the electroweak supersymmetric spectrum starts
at 1.3 TeV and the colored at ~4 TeV. Thus the reduced MSSM is in natural
agreement with all LHC measurements and searches. The supersymmetric and heavy
Higgs particles will likely escape the detection at the LHC, as well as at ILC
and CLIC. However, the FCC-hh will be able to fully test the predicted
parameter space.Comment: Revised arguments in Section 3. Results unchanged. To appear in JHEP.
arXiv admin note: text overlap with arXiv:1412.5766, arXiv:1802.04666,
arXiv:1305.507
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Reduction of the Parameters in MSSM
|
reduction of the parameters in mssm
|
renormalization massless massive supersymmetric model. favor gaugino unification them. predict supersymmetric spectrum. lightest comfortable electroweak supersymmetric starts colored tev. mssm searches. supersymmetric escape clic. revised arguments unchanged. jhep. admin overlap
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162911330
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10.1007/JHEP08(2018)153
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We present a mechanism that addresses the electroweak, the strong CP, and\ud
the flavor hierarchies of the Standard Model (including neutrino masses) in a unified way.\ud
The naturalness of the electroweak scale is solved together with the strong CP problem by\ud
the Nelson-Barr relaxion: the relaxion field is identified with the pseudo-Nambu-Goldstone\ud
boson of an abelian symmetry with no QCD anomaly. The Nelson-Barr sector generates\ud
the “rolling” potential and the relaxion vacuum expectation value at the stopping point is\ud
mapped to the Cabibbo-Kobayashi-Maskawa phase. The same abelian symmetry accounts\ud
for the Standard Model’s mass hierarchies and flavor textures through the Froggatt-Nielsen\ud
mechanism. We show how the “backreaction” potential of the relaxion can be induced by\ud
a sterile neutrino sector, without any extra state with electroweak quantum numbers. The\ud
same construction successfully explains neutrino masses and mixings. The only light field\ud
in our model is the relaxion, which we call the hierarchion because it is central to our\ud
construction that accounts for all the Standard Model hierarchies. Given its interplay with\ud
flavor symmetries, the hierarchion can be probed in flavor-violating decays of the Standard\ud
Model fermions, motivating a further experimental effort in looking for new physics in rare\ud
decays of leptons and mesons
|
The hierarchion, a relaxion addressing the Standard Model’s hierarchies.
|
the hierarchion, a relaxion addressing the standard model’s hierarchies.
|
addresses electroweak flavor hierarchies unified way. naturalness electroweak solved nelson barr relaxion relaxion pseudo nambu goldstone boson abelian anomaly. nelson barr generates “rolling” relaxion expectation stopping mapped cabibbo kobayashi maskawa phase. abelian accounts model’s hierarchies flavor textures froggatt nielsen mechanism. “backreaction” relaxion sterile extra electroweak numbers. successfully explains mixings. relaxion call hierarchion accounts hierarchies. interplay flavor symmetries hierarchion probed flavor violating decays fermions motivating effort looking rare decays leptons mesons
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141536718
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10.1007/JHEP08(2018)159
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In this paper, we introduce an $\mathcal{N}=1$ supersymmetric SYK model with
$SO(q)$ global symmetry. We study the large $N$ expansion of the bi-local
collective action of our model. At strong coupling limit, this model exhibits a
super-reparametrization symmetry, and the $SO(q)$ global symmetry is enhanced
to a $\widehat{SO}(q)$ local symmetry. The corresponding symmetry algebra is
the semi-direct product of the super-Virasoro and the super-Kac-Moody algebras.
These emergent symmetries are spontaneously and explicitly broken, which leads
to a low energy effective action: super-Schwarzian action plus an action of a
super-particle on the $SO(q)$ group manifold. We analyze the zero mode
contributions to the chaotic behavior of four point functions in various
$SO(q)$ channels. In singlet channel, we show that the out-of-time-ordered
correlators related to bosonic bi-locals exhibit the saturation of the chaos
bound as in the non-SUSY SYK model. On the other hand, we find that the ones
with fermionic bi-locals in the singlet channel have ${\pi\over\beta}$ Lyapunov
exponent. In the anti-symmetric channel, we demonstrate that the
out-of-time-ordered correlator related to a $SO(q)$ generator grows linearly in
time. We also compute the non-zero mode contributions which give consistent
corrections to the leading Lyapunov exponents from the zero modes.Comment: 48 pages + Appendix, 1 figure and 2 table
|
Supersymmetric SYK Model with Global Symmetry
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supersymmetric syk model with global symmetry
|
mathcal supersymmetric symmetry. collective model. exhibits super reparametrization widehat symmetry. super virasoro super moody algebras. emergent symmetries spontaneously explicitly broken super schwarzian super manifold. analyze chaotic channels. singlet ordered correlators bosonic locals exhibit saturation chaos susy model. fermionic locals singlet beta lyapunov exponent. ordered correlator generator grows linearly time. lyapunov exponents pages
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162911790
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10.1007/JHEP08(2018)173
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In theories with extended supersymmetry the protected observables of UV superconformal fixed points are found in a number of contexts to be encoded in the BPS solitons along an IR Coulomb-like phase. For six-dimensional SCFTs such a role is played by the BPS strings on the tensorial Coulomb branch. In this paper we develop a uniform description of the worldsheet theories of a BPS string for rank-one 6d SCFTs. These strings are the basic constituents of the BPS string spectrum of arbitrary rank six-dimensional models, which they generate by forming bound states. Motivated by geometric engineering in F-theory, we describe the worldsheet theories of the BPS strings in terms of topologically twisted 4d N=2 theories in the presence of 1/2-BPS 2d (0, 4) defects. As the superconformal point of a 6d theory with gauge group G is approached, the resulting worldsheet theory flows to an N=(0, 4) NLSM with target the moduli space of one G instanton, together with a nontrivial left moving bundle characterized by the matter content of the six-dimensional model. We compute the anomaly polynomial and central charges of the NLSM, and argue that the 6d flavor symmetry F is realized as a current algebra on the string, whose level we compute. We find evidence that for generic theories the G dependence is captured at the level of the elliptic genus by characters of an affine Kac-Moody algebra at negative level, which we interpret as a subsector of the chiral algebra of the BPS string worldsheet theory. We also find evidence for a spectral flow relating the R-R and NS-R elliptic genera. These properties of the string CFTs lead to constraints on their spectra, which in combination with modularity allow us to determine the elliptic genera of a vast number of string CFTs, leading also to novel results for 6d and 5d instanton partition functions
|
Universal features of BPS strings in six-dimensional SCFTs.
|
universal features of bps strings in six-dimensional scfts.
|
supersymmetry protected observables superconformal contexts encoded solitons coulomb phase. scfts played strings tensorial coulomb branch. worldsheet scfts. strings constituents forming states. motivated geometric worldsheet strings topologically twisted defects. superconformal approached worldsheet flows nlsm moduli instanton nontrivial moving bundle model. anomaly charges nlsm argue flavor realized compute. generic captured elliptic genus characters affine moody interpret subsector chiral worldsheet theory. relating elliptic genera. cfts modularity elliptic genera vast cfts instanton partition
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141529169
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10.1007/JHEP08(2018)186
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Dissipative relativistic fluid dynamics is not always causal and can favor
superluminal signal propagation under certain circumstances. On the other hand,
high-energy nuclear collisions have a microscopic description in terms of QCD
and are expected to follow the causality principle of special relativity. We
discuss under which conditions the fluid evolutions for a radial expansion are
hyperbolic and how the properties of the solutions are encoded in the
associated characteristic curves. The expansion dynamics is causal in
relativistic sense if the characteristic velocities are smaller than the speed
of light. We obtain a concrete inequality from this constraint and discuss how
it can be violated for certain initial conditions. We argue that causality
poses a bound to the applicability of relativistic fluid dynamics. }Comment: 23 pages, 13 figures; Added references, corrected typos, added
discussion as section 2, results unchange
|
Causality of fluid dynamics for high-energy nuclear collisions
|
causality of fluid dynamics for high-energy nuclear collisions
|
dissipative relativistic causal favor superluminal propagation circumstances. collisions microscopic causality relativity. evolutions hyperbolic encoded curves. causal relativistic velocities light. concrete inequality violated conditions. argue causality poses applicability relativistic dynamics. comment pages corrected typos unchange
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non_dup
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141536871
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10.1007/JHEP08(2018)187
|
We present a universal treatment for imposing superconformal constraints on
Mellin amplitudes for $\mathrm{SCFT_d}$ with $3\leq d\leq 6$. This leads to a
new technique to compute holographic correlators, which is similar but
complementary to the ones introduced in [1,2]. We apply this technique to
theories in various spacetime dimensions. In addition to reproducing known
results, we obtain a simple expression for next-next-to-extremal four-point
functions in $AdS_7\times S^4$. We also use this machinery on $AdS_4\times S^7$
and compute the first holographic one-half BPS four-point function. We extract
the anomalous dimension of the R-symmetry singlet double-trace operator with
the lowest conformal dimension and find agreement with the 3d $\mathcal{N}=8$
numerical bootstrap bound at large central charge.Comment: 34 pages, 1 figure; v2: minor changes, typos corrected; v3: published
versio
|
On Superconformal Four-Point Mellin Amplitudes in Dimension $d>2$
|
on superconformal four-point mellin amplitudes in dimension $d>2$
|
universal imposing superconformal mellin amplitudes mathrm scft holographic correlators complementary spacetime dimensions. reproducing extremal machinery holographic function. extract anomalous singlet trace conformal mathcal bootstrap pages minor typos corrected versio
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non_dup
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2128154
|
10.1007/JHEP09(2010)002
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We study the breaking of an Abelian symmetry close to the horizon of an
uncharged rotating Anti-de Sitter black string in 3+1 dimensions. The boundary
theory living on R^2 x S^1 has no rotation, but a magnetic field that is
aligned with the axis of the black string. This boundary theory decribes
non-rotating (2+1)-dimensional holographic superfluids with non-vanishing
superfluid velocity. We study these superfluids in the grand canonical ensemble
and show that for sufficiently small angular momentum of the dual black string
and sufficiently small superfluid velocity the phase transition is 2nd order,
while it becomes 1st order for larger superfluid velocity. Moreover, we observe
that the phase transition is always 1st order above a critical value of the
angular momentum independent of the choice of the superfluid velocity.Comment: 9 pages including 5 figures: v2: 12 pages including 7 figures; 2
figures added, discussion on free energy added; accepted for publication in
JHE
|
Holographic superfluids as duals of rotating black strings
|
holographic superfluids as duals of rotating black strings
|
breaking abelian horizon uncharged rotating sitter dimensions. living aligned string. decribes rotating holographic superfluids vanishing superfluid velocity. superfluids grand canonical ensemble sufficiently sufficiently superfluid superfluid velocity. superfluid pages pages publication
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non_dup
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2132151
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10.1007/JHEP09(2010)003
|
In the generalized minimal supergravity (GmSUGRA) scenario, we systematically
study the supersymmetry breaking scalar masses, Standard Model fermion Yukawa
coupling terms, and trilinear soft terms in SU(5) models with the Higgs fields
in the {\bf 24} and {\bf 75} representations, and in SO(10) models where the
gauge symmetry is broken down to the Pati-Salam SU(4)_C X SU(2)_L X SU(2)_R
gauge symmetry, SU(3)_C X SU(2)_L X SU(2)_R X U(1)_{B-L} gauge symmetry,
George-Glashow SU(5) X U(1)' gauge symmetry, flipped SU(5) X U(1)_X gauge
symmetry, and SU(3)_C X SU(2)_L X U(1)_1 X U(1)_2 gauge symmetry. Most
importantly, we for the first time consider the scalar and gaugino mass
relations, which can be preserved from the unification scale to the electroweak
scale under one-loop renormalization group equation running, in the SU(5)
models, the Pati-Salam models and flipped SU(5) X U(1)_X models arising from
SO(10) models. With such interesting relations, we may distinguish the minimal
supergravity (mSUGRA) and GmSUGRA scenarios if the supersymmetric particle
spectrum can be measured at the LHC and ILC. Thus, it provides us with another
important window of opportunity at the Planck scale.Comment: Latex, 33 pages, reference added, version to appear in JHE
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Supersymmetry Breaking Scalar Masses and Trilinear Soft Terms in
Generalized Minimal Supergravity
|
supersymmetry breaking scalar masses and trilinear soft terms in generalized minimal supergravity
|
supergravity gmsugra systematically supersymmetry breaking fermion yukawa trilinear representations broken pati salam george glashow flipped symmetry. importantly gaugino preserved unification electroweak renormalization running pati salam flipped arising models. distinguish supergravity msugra gmsugra scenarios supersymmetric ilc. window opportunity planck latex pages
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2132181
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10.1007/JHEP09(2010)004
|
We explore the low-energy dynamics of 1/2-BPS heavy particles coupled to the
ABJM model via the Higgsing of M2-branes, with focus on physical understanding
of the recently discovered 1/2-BPS Wilson loop operators. The low-energy theory
of 1/2-BPS heavy particles turns out to have the U(N|N) supergauge symmetry,
which explains the novel structure of the 1/2-BPS Wilson loop operator as a
holonomy of a U(N|N) superconnection. We show that the supersymmetric
transformation of the Wilson loop operator can be identified as a fermionic
supergauge transformation, which leads to their invariance under half of the
supersymmetry. We also argue that 1/2-BPS Wilson loop operators appear as
1/2-BPS vortices with vorticity 1/k. Such a vortex can be naturally interpreted
as a membrane wrapping the Z_k cycle once, or type IIA fundamental string.Comment: 22 page
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1/2-BPS Wilson Loops and Vortices in ABJM Model
|
1/2-bps wilson loops and vortices in abjm model
|
explore abjm higgsing branes discovered wilson operators. turns supergauge explains wilson holonomy superconnection. supersymmetric wilson fermionic supergauge invariance supersymmetry. argue wilson vortices vorticity vortex naturally interpreted wrapping
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non_dup
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2094705
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10.1007/JHEP09(2010)007
|
Within the AdS/CFT correspondence, the shockwave metric has been widely used
as a gravity dual for a fast moving nucleus. Here we propose a picture for
particle production in deep inelastic scattering off a shockwave with the
projectile represented by the $\mathcal{R}$-current. By using the method
developed in \cite{Avsar:2009xf} to find an explicit expression for the
scattered field, we are able to show that the scattered field can be written in
terms of time-like and space-like vacuum states where the time-like states are
identified with the outgoing particles. To support this picture, we calculate
the contribution of the time-like modes to the energy-momentum tensor of the
scattered field and show that the energy flow in the fifth dimension is
directly related to the imaginary part of the action. The energy flow in the
fifth dimension is also compared to the incoming energy flow to determine which
fraction of the initial energy goes to the produced particles. The last two
sections are devoted to localize the energy flow in momentum and coordinate
space, first by finding the virtualities that contribute the most to the total
flow, and second by finding an approximate trajectory in coordinate space.Comment: 17 pages, 1 figure. Added references. To appear in JHE
|
Particle production in DIS off a shockwave in AdS
|
particle production in dis off a shockwave in ads
|
correspondence shockwave widely moving nucleus. propose picture inelastic shockwave projectile mathcal current. cite avsar scattered scattered outgoing particles. picture scattered fifth imaginary action. fifth incoming goes particles. devoted localize coordinate virtualities approximate trajectory coordinate pages figure. references.
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non_dup
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2114831
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10.1007/JHEP09(2010)008
|
Using the recent results in the pure spinor formulation, we lay out a
ground-work towards the full momentum space amplitudes of open superstrings at
three-loop. After briefly reviewing the one-loop amplitude, we directly work
out the two-loop and reproduce the result that was obtained by a symmetry
argument. For the three-loop, first we use the two-loop regulator as a warm-up
exercise. The result vanishes. We then employ the regulator that has been
recently proposed by Aisaka and Berkovits (AB). It is noted that the terms in
higher power in $\frac{1}{\lambda\bar{\lambda}}$ that render the two-loop
regulator disqualified for the three-loop do not contribute. This with a few
other indications suggests a possibility that the AB regulator might also lead
to a vanishing result. Nevertheless, we argue that it is possible to acquire
the three-loop amplitude, and present a result that we anticipate to be the
three-loop amplitude.Comment: 41 pages, latex, cosmetic change
|
Pure spinor computation towards open string three-loop
|
pure spinor computation towards open string three-loop
|
spinor formulation amplitudes superstrings loop. briefly reviewing reproduce argument. regulator warm exercise. vanishes. employ regulator aisaka berkovits frac lambda lambda render regulator disqualified contribute. indications regulator vanishing result. nevertheless argue acquire anticipate pages latex cosmetic
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non_dup
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2129462
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10.1007/JHEP09(2010)009
|
We analyze the semiclassical Ho\v{r}ava-Lifshitz gravity for quantum scalar
fields in 3+1 dimensions. The renormalizability of the theory requires that the
action of the scalar field contains terms with six spatial derivatives of the
field, i.e. in the UV, the classical action of the scalar field should preserve
the anisotropic scaling symmetry ($t \to L^{2z}t,$ $\vec{x} \to L^2 \vec{x}$,
with $z=3$) of the gravitational action. We discuss the renormalization
procedure based on adiabatic subtraction and dimensional regularization in the
weak field approximation. We verify that the divergent terms in the adiabatic
expansion of the expectation value of the energy-momentum tensor of the scalar
field contain up to six spatial derivatives, but do not contain more than two
time derivatives. We compute explicitly the counterterms needed for the
renormalization of the theory up to second adiabatic order and evaluate the
associated $\beta$ functions in the minimal subtraction scheme.Comment: 8 page
|
Counterterms in semiclassical Horava-Lifshitz gravity
|
counterterms in semiclassical horava-lifshitz gravity
|
analyze semiclassical lifshitz dimensions. renormalizability derivatives i.e. preserve anisotropic gravitational action. renormalization adiabatic subtraction regularization approximation. verify divergent adiabatic expectation derivatives derivatives. explicitly counterterms renormalization adiabatic beta subtraction
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non_dup
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[] |
2129419
|
10.1007/JHEP09(2010)010
|
This work sets up a general theoretical framework to study stability of
models with a warped extra dimension where N scalar fields couple minimally to
gravity. Our analysis encompasses Randall-Sundrum models with branes and bulk
scalars, and general domain-wall models. We derive the Schrodinger equation
governing the spin-0 spectrum of perturbations of such a system. This result is
specialized to potentials generated using fake supergravity, and we show that
models without branes are free of tachyonic modes. Turning to the existence of
zero modes, we prove a criterion which relates the number of normalizable zero
modes to the parities of the scalar fields. Constructions with definite parity
and only odd scalars are shown to be free of zero modes and are hence
perturbatively stable. We give two explicit examples of domain-wall models with
a soft wall, one which admits a zero mode and one which does not. The latter is
an example of a model that stabilizes a compact extra dimension using only bulk
scalars and does not require dynamical branes.Comment: 25 pages, 2 figures; v2: minor changes to text, references added,
matches published versio
|
Stability of Scalar Fields in Warped Extra Dimensions
|
stability of scalar fields in warped extra dimensions
|
warped extra couple minimally gravity. encompasses randall sundrum branes scalars models. derive schrodinger governing perturbations system. specialized potentials fake supergravity branes tachyonic modes. turning criterion relates normalizable parities fields. constructions definite parity scalars perturbatively stable. admits not. stabilizes extra scalars pages minor matches versio
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non_dup
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2133852
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10.1007/JHEP09(2010)013
|
We study SU(5) Grand Unified Theories within a local framework in F-theory
with multiple extra U(1) symmetries arising from a small monodromy group. The
use of hypercharge flux for doublet-triplet splitting implies massless exotics
in the spectrum that are protected from obtaining a mass by the U(1)
symmetries. We find that lifting the exotics by giving vacuum expectation
values to some GUT singlets spontaneously breaks all the U(1) symmetries which
implies that proton decay operators are induced. If we impose an additional
R-parity symmetry by hand we find all the exotics can be lifted while proton
decay operators are still forbidden. These models can retain the gauge coupling
unification accuracy of the MSSM at 1-loop. For models where the generations
are distributed across multiple curves we also present a motivation for the
quark-lepton mass splittings at the GUT scale based on a Froggatt-Nielsen
approach to flavour.Comment: 38 pages; v2: emphasised possibility of avoiding exotics in models
without a global E8 structure, added ref, journal versio
|
On hypercharge flux and exotics in F-theory GUTs
|
on hypercharge flux and exotics in f-theory guts
|
grand unified extra symmetries arising monodromy group. hypercharge doublet triplet splitting massless exotics protected obtaining symmetries. lifting exotics giving expectation singlets spontaneously breaks symmetries proton induced. impose parity exotics lifted proton forbidden. retain unification mssm loop. generations motivation lepton splittings froggatt nielsen pages emphasised avoiding exotics versio
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2125170
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10.1007/JHEP09(2010)014
|
We reexamine the Randall-Sundrum (RS) model with enlarged gauge symmetry
SU(2)_L x SU(2)_R x U(1)_X x P_LR in the presence of a brane-localized Higgs
sector. In contrast to the existing literature, we perform the Kaluza-Klein
(KK) decomposition within the mass basis, which avoids the truncation of the KK
towers. Expanding the low-energy spectrum as well as the gauge couplings in
powers of the Higgs vacuum expectation value, we obtain analytic formulas which
allow for a deep understanding of the model-specific protection mechanisms of
the T parameter and the left-handed Z-boson couplings. In particular, in the
latter case we explain which contributions escape protection and identify them
with the irreducible sources of P_LR symmetry breaking. We furthermore show
explicitly that no protection mechanism is present in the charged-current
sector confirming existing model-independent findings. The main focus of the
phenomenological part of our work is a detailed discussion of Higgs-boson
couplings and their impact on physics at the CERN Large Hadron Collider. For
the first time, a complete one-loop calculation of all relevant Higgs-boson
production and decay channels is presented, incorporating the effects stemming
from the extended electroweak gauge-boson and fermion sectors.Comment: 74 pages, 13 figures, 3 tables. v2: Matches version published in JHE
|
The Custodial Randall-Sundrum Model: From Precision Tests to Higgs
Physics
|
the custodial randall-sundrum model: from precision tests to higgs physics
|
reexamine randall sundrum enlarged brane localized sector. kaluza klein decomposition avoids truncation towers. expanding couplings powers expectation analytic formulas protection handed boson couplings. escape protection irreducible breaking. explicitly protection confirming findings. phenomenological boson couplings cern hadron collider. boson incorporating stemming electroweak boson fermion pages tables. matches
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non_dup
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2094689
|
10.1007/JHEP09(2010)017
|
A comprehensive analysis of tree-level weak interaction processes at low
energy is presented for the Randall-Sundrum (RS) model with SU(2)_L * U(1)_Y
bulk gauge symmetry and brane-localized Higgs sector. The complete form of the
effective weak Hamiltonian is obtained, which results from tree-level exchange
of Kaluza-Klein (KK) gluons and photons, the W^+- and Z^0 bosons and their KK
excitations, as well as the Higgs boson. Exact expressions are used for the
bulk profiles of the various fields, and for the exchange of entire towers of
KK gauge-boson states. A detailed phenomenological analysis is performed for
potential new-physics effects in neutral-meson mixing and in rare decays of
kaons and B mesons, including both inclusive and exclusive processes. We find
that while the predictions for \Delta(F)=2 observables are rather
model-independent, \Delta(F)=1 processes depend sensitively on the exact
realizations of the electroweak gauge and the fermionic sector. In this
context, we emphasize that the localization of the right-handed top quark in
the extra dimension plays a crucial role in the case of rare Z^0-mediated
decays, as it determines the relative size of left- to right-handed couplings.
We also extend earlier studies of quark flavor-changing neutral currents by
examining observables which up to now attracted little attention. These include
D-D(bar) mixing, B-->\tau\nu, B-->X_s (K^*) l^+ l^-, \epsilon_K'/\epsilon_K,
B-->\pi K, B^0-->\phi K_S, B^0-->\eta' K_S, and B^+-->\pi^+\pi^0.Comment: 112 pages (sorry!), 22 figures; v2: Extended version of the JHEP
publicatio
|
Flavor Physics in the Randall-Sundrum Model: II. Tree-Level
Weak-Interaction Processes
|
flavor physics in the randall-sundrum model: ii. tree-level weak-interaction processes
|
comprehensive randall sundrum brane localized sector. kaluza klein gluons photons bosons excitations boson. expressions towers boson states. phenomenological neutral meson rare decays kaons mesons inclusive exclusive processes. delta observables delta sensitively realizations electroweak fermionic sector. emphasize localization handed extra plays crucial rare decays determines handed couplings. extend flavor changing neutral currents examining observables attracted attention. epsilon epsilon pages sorry jhep publicatio
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non_dup
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[] |
2125269
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10.1007/JHEP09(2010)019
|
Composite Higgs models provide a natural, non-supersymmetric solution to the
hierarchy problem. In these models, one or more sets of heavy top-partners are
typically introduced. Some of these new quarks can be relatively light, with a
mass of a few hundred GeV, and could be observed with the early LHC collision
data expected to be collected during 2010. We analyse in detail the collider
signatures that these new quarks can produce. We show that final states with
two (same-sign) or three leptons are the most promising discovery channels.
They can yield a 5 sigma excess over the Standard Model expectation already
with the 2010 LHC collision data. Exotic quarks of charge 5/3 are a distinctive
feature of this model. We present a new method to reconstruct their masses from
their leptonic decay without relying on jets in the final state.Comment: 28 pages 11 Figures 7 Tables, minor changes, added references,
matches published versio
|
Discovery potential of top-partners in a realistic composite Higgs model
with early LHC data
|
discovery potential of top-partners in a realistic composite higgs model with early lhc data
|
composite supersymmetric hierarchy problem. partners introduced. quarks hundred collision analyse collider signatures quarks produce. leptons promising discovery channels. sigma excess expectation collision data. exotic quarks distinctive model. reconstruct leptonic relying jets pages tables minor matches versio
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non_dup
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[] |
2102685
|
10.1007/JHEP09(2010)020
|
F-theory GUT models favor a relatively narrow range of soft supersymmetry
breaking parameters in the MSSM Lagrangian. This leads to the specific
predictions that a 10-100 MeV mass gravitino is the LSP, and the NLSP is
quasi-stable, with a lifetime between a second to an hour. In a wide range of
parameter space, the NLSP turns out to be a stau, though a bino-like lightest
neutralino is also possible. Focusing on F-theory GUTs with a stau NLSP, we
study the discovery potential at the LHC for such scenarios. Models with a
quasi-stable stau predict a striking signature of a heavy charged particle
passing through the detector. As a function of the parameters of minimal
F-theory GUTs, we study how many of such events to expect, and additional
signatures correlated with the presence of quasi-stable staus. We also study
the prospects for staus to become stopped in or near the detector, as well as
potential ways to distinguish such models from minimal gauge mediation models
with similar spectra.Comment: v2: 75 pages, 29 figures, references adde
|
F-theory and the LHC: Stau Search
|
f-theory and the lhc: stau search
|
favor narrow supersymmetry breaking mssm lagrangian. gravitino nlsp quasi lifetime hour. nlsp turns stau bino lightest neutralino possible. focusing guts stau nlsp discovery scenarios. quasi stau predict striking signature passing detector. guts signatures quasi staus. prospects staus stopped ways distinguish mediation pages adde
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[] |
2132508
|
10.1007/JHEP09(2010)021
|
We perform a systematic analysis of an extension of the Standard Model that
includes a complex singlet scalar field and is scale invariant at the tree
level. We call such a model the Minimal Scale Invariant extension of the
Standard Model (MSISM). The tree-level scale invariance of the model is
explicitly broken by quantum corrections, which can trigger electroweak
symmetry breaking and potentially provide a mechanism for solving the gauge
hierarchy problem. Even though the scale invariant Standard Model is not a
realistic scenario, the addition of a complex singlet scalar field may result
in a perturbative and phenomenologically viable theory. We present a complete
classification of the flat directions which may occur in the classical scalar
potential of the MSISM. After calculating the one-loop effective potential of
the MSISM, we investigate a number of representative scenarios and determine
their scalar boson mass spectra, as well as their perturbatively allowed
parameter space compatible with electroweak precision data. We discuss the
phenomenological implications of these scenarios, in particular, whether they
realize explicit or spontaneous CP violation, neutrino masses or provide dark
matter candidates. In particular, we find a new minimal scale-invariant model
of maximal spontaneous CP violation which can stay perturbative up to
Planck-mass energy scales, without introducing an unnaturally large hierarchy
in the scalar-potential couplings.Comment: 71 pages, 34 eps figures, numerical error corrected, clarifying
comments adde
|
The Minimal Scale Invariant Extension of the Standard Model
|
the minimal scale invariant extension of the standard model
|
singlet level. call msism invariance explicitly broken trigger electroweak breaking potentially solving hierarchy problem. realistic singlet perturbative phenomenologically viable theory. directions msism. calculating msism scenarios boson perturbatively compatible electroweak precision data. phenomenological scenarios realize spontaneous violation candidates. maximal spontaneous violation stay perturbative planck introducing unnaturally hierarchy pages corrected clarifying comments adde
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non_dup
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[] |
2124426
|
10.1007/JHEP09(2010)022
|
Extremal scalar three-point correlators in the near-NHEK geometry of Kerr
black holes have recently been shown to agree with the result expected from a
holographically dual non-chiral two-dimensional conformal field theory. In this
paper we extend this calculation to extremal three-point functions of scalars
in a general Kerr black hole which need not obey the extremality condition
$M=\sqrt{J}$. It was recently argued that for low frequency scalars in the Kerr
geometry there is a dual conformal field theory description which determines
the interactions in this regime. Our results support this conjecture.
Furthermore, we formulate a recipe for calculating finite-temperature retarded
three-point correlation functions which is applicable to a large class of (even
non-extremal) correlators, and discuss the vanishing of the extremal couplings.Comment: 16 page
|
Correlation Functions and Hidden Conformal Symmetry of Kerr Black Holes
|
correlation functions and hidden conformal symmetry of kerr black holes
|
extremal correlators nhek kerr holes agree holographically chiral conformal theory. extend extremal scalars kerr obey extremality sqrt argued scalars kerr conformal determines regime. conjecture. formulate recipe calculating retarded applicable extremal correlators vanishing extremal
|
non_dup
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[] |
2132126
|
10.1007/JHEP09(2010)023
|
We study the potential of testing the seesaw type I and III models at the
LHeC, an e-p collision mode at the CERN collider. The e-p collision mode
provides an excellent place to study lepton number violating process e^- p \to
N j + X \to l^+ W^- j + X with W^- into hadron jets. Here N is a heavy Majorana
neutrino and j is a hard hadron jet. With the electron energy E_e = 140 GeV and
proton energy E_p = 7 TeV, we find that the cross section for the heavy
neutrino N production can be as large as a few fb for the mass scale as high as
1 TeV, higher than what can be achieved by the p-p collision mode of LHC with
the same related heavy neutrino couplings.Comment: 20 pages, 6 figure
|
Seesaw Type I and III at the LHeC
|
seesaw type i and iii at the lhec
|
seesaw lhec collision cern collider. collision excellent lepton violating hadron jets. majorana hadron jet. proton collision pages
|
non_dup
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[] |
2117685
|
10.1007/JHEP09(2010)025
|
The feasibility for the observation of a certain leptonic Kaluza-Klein (KK)
hard process in {\em pp} interactions at the LHC is presented. Within the
$S^1/Z_2$ TeV$^{-1}$ extra dimensional theoretical framework with the focus on
the KK excitations of the Standard Model $\gamma$ and $Z^0$ gauge bosons, the
hard-process, $f\bar f \to \sum_n\left(\gamma^*/Z^*\right)_n \to F \bar F$, has
been used where $f$ is the initial state parton, $F$ the final state lepton and
$\left(\gamma^*/Z^*\right)_{n}$ is the $n^{\rm th}$ KK excitation of the
$\gamma/Z^0$ boson. For this study the analytic form for the hard process cross
section has been independently calculated by the authors and has been
implemented using the {\sc Moses} framework. The Moses framework itself, that
has been written by the authors, was used as an external process within the
{\sc Pythia} Monte Carlo generator which provides the phase space generation
for the final state leptons and partons from the initial state hadrons, and the
simulation of initial and final state radiation and hadronization. A brief
discussion of the possibility for observing and identifying the unique
signature of the KK signal given the current LHC program is also presented.Comment: 16 pages 10 figures, MCnet number: MCnet/10/06, Accepted by JHE
|
A search for heavy Kaluza-Klein electroweak gauge bosons at the LHC
|
a search for heavy kaluza-klein electroweak gauge bosons at the lhc
|
feasibility leptonic kaluza klein presented. extra excitations gamma bosons gamma parton lepton gamma gamma boson. analytic independently implemented moses framework. moses pythia monte carlo generator leptons partons hadrons hadronization. brief observing identifying signature pages mcnet mcnet
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non_dup
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[] |
2135286
|
10.1007/JHEP09(2010)026
|
We discuss the wall-crossing of the BPS bound states of a non-compact
holomorphic D4-brane with D2 and D0-branes on the conifold. We use the
Kontsevich-Soibelman wall-crossing formula and analyze the BPS degeneracy in
various chambers. In particular we obtain a relation between BPS degeneracies
in two limiting attractor chambers related by a flop transition. Our result is
consistent with known results and predicts BPS degeneracies in all chambers.Comment: 15 pages, 4 figures; v2: typos corrected; v3: minor changes, a
reference added, version to be published in JHE
|
Wall-crossing of D4-D2-D0 and flop of the conifold
|
wall-crossing of d4-d2-d0 and flop of the conifold
|
crossing holomorphic brane branes conifold. kontsevich soibelman crossing analyze degeneracy chambers. degeneracies limiting attractor chambers flop transition. predicts degeneracies pages typos corrected minor
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non_dup
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[] |
2128601
|
10.1007/JHEP09(2010)027
|
We investigate the renormalization properties of minimally doubled fermions,
at one loop in perturbation theory. Our study is based on the two particular
realizations of Borici-Creutz and Karsten-Wilczek. A common feature of both
formulations is the breaking of hyper-cubic symmetry, which requires that the
lattice actions are supplemented by suitable counterterms. We show that three
counterterms are required in each case and determine their coefficients to one
loop in perturbation theory. For both actions we compute the vacuum
polarization of the gluon. It is shown that no power divergences appear and
that all contributions which arise from the breaking of Lorentz symmetry are
cancelled by the counterterms. We also derive the conserved vector and
axial-vector currents for Karsten-Wilczek fermions. Like in the case of the
previously studied Borici-Creutz action, one obtains simple expressions,
involving only nearest-neighbour sites. We suggest methods how to fix the
coefficients of the counterterms non-perturbatively and discuss the
implications of our findings for practical simulations.Comment: 23 pages, 1 figur
|
Renormalization of minimally doubled fermions
|
renormalization of minimally doubled fermions
|
renormalization minimally doubled fermions perturbation theory. realizations borici creutz karsten wilczek. formulations breaking hyper cubic supplemented counterterms. counterterms perturbation theory. gluon. divergences arise breaking lorentz cancelled counterterms. derive conserved axial currents karsten wilczek fermions. borici creutz obtains expressions involving nearest neighbour sites. counterterms perturbatively practical pages figur
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non_dup
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2131589
|
10.1007/JHEP09(2010)028
|
We obtain Yang-Mills $SU(2)\times G$ gauged supergravity in three dimensions
from $SU(2)$ group manifold reduction of (1,0) six dimensional supergravity
coupled to an anti-symmetric tensor multiplet and gauge vector multiplets in
the adjoint of $G$. The reduced theory is consistently truncated to $N=4$ 3D
supergravity coupled to $4(1+\textrm{dim}\, G)$ bosonic and $4(1+\textrm{dim}\,
G)$ fermionic propagating degrees of freedom. This is in contrast to the
reduction in which there are also massive vector fields. The scalar manifold is
$\mathbf{R}\times \frac{SO(3,\, \textrm{dim}\, G)}{SO(3)\times
SO(\textrm{dim}\, G)}$, and there is a $SU(2)\times G$ gauge group. We then
construct $N=4$ Chern-Simons $(SO(3)\ltimes \mathbf{R}^3)\times (G\ltimes
\mathbf{R}^{\textrm{dim}G})$ three dimensional gauged supergravity with scalar
manifold $\frac{SO(4,\,1+\textrm{dim}G)}{SO(4)\times SO(1+\textrm{dim}G)}$ and
explicitly show that this theory is on-shell equivalent to the Yang-Mills
$SO(3)\times G$ gauged supergravity theory obtained from the $SU(2)$ reduction,
after integrating out the scalars and gauge fields corresponding to the
translational symmetries $\mathbf{R}^3\times \mathbf{R}^{\textrm{dim}\, G}$.Comment: 24 pages, no figures, references added and typos correcte
|
3D gauged supergravity from SU(2) reduction of $N=1$ 6D supergravity
|
3d gauged supergravity from su(2) reduction of $n=1$ 6d supergravity
|
mills gauged supergravity manifold supergravity multiplet multiplets adjoint consistently truncated supergravity textrm bosonic textrm fermionic propagating freedom. massive fields. manifold mathbf frac textrm textrm group. chern simons ltimes mathbf ltimes mathbf textrm gauged supergravity manifold frac textrm textrm explicitly mills gauged supergravity integrating scalars translational symmetries mathbf mathbf textrm .comment pages typos correcte
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non_dup
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[] |
2132996
|
10.1007/JHEP09(2010)029
|
The Wess-Zumino coupling on D-branes in string theory is known to receive
higher derivative corrections which couple the Ramond-Ramond potential to terms
involving the square of the spacetime curvature tensor. Consistency with
T-duality implies that the branes should also have four-derivative couplings
that involve the NS-NS B-field. We use T-duality to predict some of these
couplings. We then confirm these results with string worldsheet computations by
evaluating disc amplitudes with insertions of one R-R and two NS-NS vertex
operators.Comment: 30 pages, 1 figure, references adde
|
Higher Derivative Brane Couplings from T-Duality
|
higher derivative brane couplings from t-duality
|
wess zumino branes receive couple ramond ramond involving spacetime curvature tensor. consistency duality branes couplings involve field. duality predict couplings. confirm worldsheet computations evaluating disc amplitudes insertions pages adde
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non_dup
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[] |
2094003
|
10.1007/JHEP09(2010)032
|
We propose that string theory in the background of dyon black holes in
four-dimensional anti-de Sitter spacetime is holographic dual to conformally
invariant composite Dirac fermion metal. By utilizing S-duality map, we show
that thermodynamic and transport properties of the black hole match with those
of composite fermion metal, exhibiting Fermi liquid-like. Built upon
Dirac-Schwinger-Zwanziger quantization condition, we argue that turning on
magnetic charges to electric black hole along the orbit of Gamma(2) subgroup of
SL(2,Z) is equivalent to attaching even unit of statistical flux quanta to
constituent fermions. Being at metallic point, the statistical magnetic flux is
interlocked to the background magnetic field. We find supporting evidences for
proposed holographic duality from study of internal energy of black hole and
probe bulk fermion motion in black hole background. They show good agreement
with ground-state energy of composite fermion metal in Thomas-Fermi
approximation and cyclotron motion of a constituent or composite fermion
excitation near Fermi-point.Comment: 30 pages, v2. 1 figure added, minor typos corrected; v3. revised
version to be published in JHE
|
Composite Fermion Metals from Dyon Black Holes and S-Duality
|
composite fermion metals from dyon black holes and s-duality
|
propose dyon holes sitter spacetime holographic conformally composite dirac fermion metal. utilizing duality thermodynamic match composite fermion exhibiting fermi like. built dirac schwinger zwanziger quantization argue turning charges orbit gamma subgroup attaching quanta constituent fermions. metallic interlocked field. supporting evidences holographic duality fermion background. composite fermion thomas fermi cyclotron constituent composite fermion fermi pages minor typos corrected revised
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non_dup
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[] |
2124853
|
10.1007/JHEP09(2010)033
|
We study extensions of the Standard Model with general new vector bosons. The
full Standard Model gauge symmetry is used to classify the extra vectors and
constrain their couplings. We derive the corresponding effective Lagrangian,
valid at energies lower than the mass of the extra vectors, and use it to
extract limits from electroweak precision observables, including LEP 2 data. We
consider both universal and nonuniversal couplings to fermions. We study the
interplay of several extra vectors, which can have the effect of opening new
regions in parameter space. In particular, it allows to explain the anomaly in
the bottom forward-backward asymmetry with perturbative couplings. Finally, we
analyze quantitatively the implications for the Higgs mass.Comment: Latex 50 pages, 12 eps figures. Typos fixed, comments and references
adde
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Electroweak Limits on General New Vector Bosons
|
electroweak limits on general new vector bosons
|
extensions bosons. classify extra constrain couplings. derive lagrangian valid extra extract electroweak precision observables data. universal nonuniversal couplings fermions. interplay extra opening space. anomaly backward asymmetry perturbative couplings. analyze quantitatively latex pages figures. typos comments adde
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non_dup
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[] |
2132630
|
10.1007/JHEP09(2010)034
|
First we present a theoretical framework to compute the fully differential
cross sections for the top-quark productions and their subsequent decays at
hadron colliders, incorporating the bound-state effects which are important in
the t\bar{t} threshold region. We include the bound-state effects such that the
cross sections are correct in the LO approximation both in the threshold and
high-energy regions. Then, based on this framework we compute various
kinematical distributions of top quarks as well as of their decay products at
the LHC, by means of Monte-Carlo event-generation. These are compared with the
corresponding predictions based on conventional perturbative QCD. In
particular, we find a characteristic bound-state effect on the
(bW^+)-(\bar{b}W^-) double-invariant-mass distribution, which is deformed to
the lower invariant-mass side in a correlated manner.Comment: 40 pages, 25 figures; minor corrections, references added; a typo in
Eq. (B.9) correcte
|
Bound-state effects on kinematical distributions of top quarks at hadron
colliders
|
bound-state effects on kinematical distributions of top quarks at hadron colliders
|
productions decays hadron colliders incorporating region. regions. kinematical quarks monte carlo generation. perturbative qcd. deformed pages minor typo correcte
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non_dup
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[] |
2134427
|
10.1007/JHEP09(2010)035
|
The D0 collaboration has recently announced evidence for a dimuon CP
asymmetry in B_{d,s} decays of order one percent. If confirmed, this asymmetry
requires new physics. We argue that for minimally flavor violating (MFV) new
physics, and at low tan beta=v_u/v_d, there are only two four-quark operators
(Q_{2,3}) that can provide the required CP violating effect. The scale of such
new physics must lie below 260 GeV sqrt{tan beta}. The effect is universal in
the B_s and B_d systems, leading to S_{psi K}~sin(2beta)-0.15 and S_{psi
phi}~0.25. The effects on epsilon_K and on electric dipole moments are
negligible. The most plausible mechanism is tree-level scalar exchange. MFV
supersymmetry with low tan beta will be excluded. Finally, we explain how a
pattern of deviations from the Standard Model predictions for S_{psi phi},
S_{psi K} and epsilon_K can be used to test MFV and, if MFV holds, to probe its
structure in detail.Comment: 11 pages. v2: References adde
|
Implications of large dimuon CP asymmetry in B_{d,s} decays on minimal
flavor violation with low tan beta
|
implications of large dimuon cp asymmetry in b_{d,s} decays on minimal flavor violation with low tan beta
|
announced dimuon asymmetry decays percent. confirmed asymmetry physics. argue minimally flavor violating beta violating effect. sqrt beta universal beta epsilon dipole moments negligible. plausible exchange. supersymmetry beta excluded. deviations epsilon pages. adde
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non_dup
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[] |
2108209
|
10.1007/JHEP09(2010)037
|
Assuming that dark matter is a weakly interacting massive particle (WIMP)
species X produced in the early Universe as a cold thermal relic, we study the
collider signal of pp or ppbar -> XXbar + jets and its distinguishability from
standard-model background processes associated with jets and missing energy. We
assume that the WIMP is the sole particle related to dark matter within reach
of the LHC--a "maverick" particle--and that it couples to quarks through a
higher dimensional contact interaction. We simulate the WIMP final-state signal
XXbar + jet and dominant standard-model (SM) background processes and find that
the dark-matter production process results in higher energies for the colored
final state partons than do the standard-model background processes, resulting
in more QCD radiation and a higher jet multiplicity. As a consequence, the
detectable signature of maverick dark matter is an excess over standard-model
expectations of events consisting of large missing transverse energy, together
with large leading jet transverse momentum and scalar sum of the transverse
momenta of the jets. Existing Tevatron data and forthcoming LHC data can
constrain (or discover!) maverick dark matter.Comment: 11 pages, 7 figure
|
Maverick dark matter at colliders
|
maverick dark matter at colliders
|
weakly interacting massive wimp universe cold relic collider ppbar xxbar jets distinguishability jets missing energy. wimp sole maverick couples quarks interaction. simulate wimp xxbar colored partons multiplicity. detectable signature maverick excess expectations consisting missing momenta jets. tevatron forthcoming constrain discover maverick pages
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non_dup
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[] |
2136711
|
10.1007/JHEP09(2010)038
|
We calculate the heavy quarkonium energy levels and decay widths in a
quark-gluon plasma, whose temperature T and screening mass m_D satisfy the
hierarchy m alpha_s >> T >> m alpha_s^2 >> m_D (m being the heavy-quark mass),
at order m alpha_s^5. We first sequentially integrate out the scales m, m
alpha_s and T, and, next, we carry out the calculations in the resulting
effective theory using techniques of integration by regions. A collinear region
is identified, which contributes at this order. We also discuss the
implications of our results concerning heavy quarkonium suppression in heavy
ion collisions.Comment: 25 pages, 2 figure
|
Heavy Quarkonium in a weakly-coupled quark-gluon plasma below the
melting temperature
|
heavy quarkonium in a weakly-coupled quark-gluon plasma below the melting temperature
|
quarkonium widths gluon screening satisfy hierarchy alpha alpha alpha sequentially integrate alpha carry regions. collinear contributes order. concerning quarkonium suppression pages
|
non_dup
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[] |
2146614
|
10.1007/JHEP09(2010)039
|
Motivated by the recently proposed Kerr/CFT correspondence, we investigate
the holographic dual of the extremal and non-extremal rotating linear dilaton
black hole in Einstein-Maxwell-Dilaton-Axion Gravity. For the case of extremal
black hole, by imposing the appropriate boundary condition at spatial infinity
of the near horizon extremal geometry, the Virasoro algebra of conserved
charges associated with the asymptotic symmetry group is obtained. It is shown
that the microscopic entropy of the dual conformal field given by Cardy formula
exactly agrees with Bekenstein-Hawking entropy of extremal black hole. Then, by
rewriting the wave equation of massless scalar field with sufficient low energy
as the SL(2, R)$_L$$\times$SL(2, R)$_R$ Casimir operator, we find the hidden
conformal symmetry of the non-extremal linear dilaton black hole, which implies
that the non-extremal rotating linear dilaton black hole is holographically
dual to a two dimensional conformal field theory with the non-zero left and
right temperatures. Furthermore, it is shown that the entropy of non-extremal
black hole can be reproduced by using Cardy formula.Comment: 15 pages, no figure, published versio
|
Holographic Dual of Linear Dilaton Black Hole in
Einstein-Maxwell-Dilaton-Axion Gravity
|
holographic dual of linear dilaton black hole in einstein-maxwell-dilaton-axion gravity
|
motivated kerr correspondence holographic extremal extremal rotating dilaton einstein maxwell dilaton axion gravity. extremal imposing infinity horizon extremal virasoro conserved charges asymptotic obtained. microscopic conformal cardy agrees bekenstein hawking extremal hole. rewriting massless casimir hidden conformal extremal dilaton extremal rotating dilaton holographically conformal temperatures. extremal reproduced cardy pages versio
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non_dup
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[] |
2138853
|
10.1007/JHEP09(2010)041
|
Reformulating our recent result (arXiv:1007.1246 [hep-th]) in coordinate
space we point out that no matter how regular is short-distance behavior of
Green's function the entanglement entropy in the corresponding quantum field
theory is always UV divergent. In particular, we discuss a recent example by
Padmanabhan (arXiv:1007.5066 [gr-qc]) of a regular Green's function and show
that provided this function arises in a field theory the entanglement entropy
in this theory is UV divergent and calculate the leading divergent term.Comment: LaTeX, 6 page
|
Short-distance regularity of Green's function and UV divergences in
entanglement entropy
|
short-distance regularity of green's function and uv divergences in entanglement entropy
|
reformulating coordinate entanglement divergent. padmanabhan arises entanglement divergent divergent latex
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non_dup
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[] |
2132610
|
10.1007/JHEP09(2010)043
|
In this short note, we prove the supersymmetric Kawai-Lewellen-Tye (KLT)
relations between N=8 supergravity (SUGRA) and N=4 super Yang-Mills (SYM)
tree-level amplitudes in the frame of S-matrix program, especially we do not
use string theory or the explicit Lagrangian form of corresponding theories.
Our supersymmetric KLT relations naturally unify the non-supersymmetric KLT
relations and newly discovered gauge theory identities and produce more
identities for amplitudes involving scalars and fermions. We point out also
that these newly discovered identities can be used to reduce helicity basis
from (n-3)! further down.Comment: 12 Page
|
KLT and New Relations for N=8 SUGRA and N=4 SYM
|
klt and new relations for n=8 sugra and n=4 sym
|
supersymmetric kawai lewellen supergravity sugra super mills amplitudes lagrangian theories. supersymmetric naturally unify supersymmetric newly discovered identities identities amplitudes involving scalars fermions. newly discovered identities helicity
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non_dup
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[] |
2136545
|
10.1007/JHEP09(2010)044
|
We investigate the impact of extra vector-like GUT multiplets on the
predicted value of the strong coupling. We find in particular that Yukawa
couplings between such extra multiplets and the MSSM Higgs doublets can resolve
the familiar two-loop discrepancy between the SUSY GUT prediction and the
measured value of alpha_3. Our analysis highlights the advantages of the
holomorphic scheme, where the perturbative running of gauge couplings is
saturated at one loop and further corrections are conveniently described in
terms of wavefunction renormalization factors. If the gauge couplings as well
as the extra Yukawas are of O(1) at the unification scale, the relevant
two-loop correction can be obtained analytically. However, the effect persists
also in the weakly-coupled domain, where possible non-perturbative corrections
at the GUT scale are under better control.Comment: 26 pages, LaTeX. v6: Important early reference adde
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Precision Gauge Unification from Extra Yukawa Couplings
|
precision gauge unification from extra yukawa couplings
|
extra multiplets coupling. yukawa couplings extra multiplets mssm doublets resolve familiar discrepancy susy alpha highlights advantages holomorphic perturbative running couplings saturated conveniently wavefunction renormalization factors. couplings extra yukawas unification analytically. persists weakly perturbative pages latex. adde
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non_dup
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[] |
2125521
|
10.1007/JHEP09(2010)045
|
In Minkowski space, an accelerated reference frame may be defined as one that
is related to an inertial frame by a sequence of instantaneous Lorentz
transformations. Such an accelerated observer sees a causal horizon, and the
quantum vacuum of the inertial observer appears thermal to the accelerated
observer, also known as the Unruh effect. We argue that an accelerating frame
may be similarly defined (i.e. as a sequence of instantaneous Lorentz
transformations) in noncommutative Moyal spacetime, and discuss the twisted
quantum field theory appropriate for such an accelerated observer. Our analysis
shows that there are several new features in the case of noncommutative
spacetime: chiral massless fields in $(1+1)$ dimensions have a qualitatively
different behavior compared to massive fields. In addition, the vacuum of the
inertial observer is no longer an equilibrium thermal state of the accelerating
observer, and the Bose-Einstein distribution acquires $\theta$-dependent
corrections.Comment: 19 pages. Typos correcte
|
Uniformly Accelerated Observer in Moyal Spacetime
|
uniformly accelerated observer in moyal spacetime
|
minkowski accelerated inertial instantaneous lorentz transformations. accelerated observer sees causal horizon inertial observer accelerated observer unruh effect. argue accelerating i.e. instantaneous lorentz transformations noncommutative moyal spacetime twisted accelerated observer. noncommutative spacetime chiral massless qualitatively massive fields. inertial observer accelerating observer bose einstein acquires theta pages. typos correcte
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non_dup
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[] |
2112245
|
10.1007/JHEP09(2010)046
|
The inert doublet model, a minimal extension of the Standard Model by a
second higgs doublet with no direct couplings to quarks or leptons, is one of
the simplest scenarios that can explain the dark matter. In this paper, we
study in detail the impact of dark matter annihilation into three-body final
state on the phenomenology of the inert doublet model. We find that this new
annihilation mode dominates, in a relevant portion of the parameter space, over
those into two-body final states considered in previous analysis. As a result,
the computation of the relic density is modified and the viable regions of the
model are displaced. After obtaining the genuine viable regions for different
sets of parameters, we compute the direct detection cross section of inert
higgs dark matter and find it to be up to two orders of magnitude smaller than
what is obtained for two-body final states only. Other implications of these
results, including the modification to the decay width of the higgs and to the
indirect detection signatures of inert higgs dark matter, are also briefly
considered. We demonstrate, therefore, that the annihilation into three-body
final state can not be neglected, as it has a important impact on the entire
phenomenology of the inert doublet model.Comment: 22 pages, format changed, more detailed discussion in general,
figures and references adde
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The inert doublet model of dark matter revisited
|
the inert doublet model of dark matter revisited
|
inert doublet doublet couplings quarks leptons simplest scenarios matter. annihilation phenomenology inert doublet model. annihilation dominates portion analysis. relic viable displaced. obtaining genuine viable inert orders only. modification indirect signatures inert briefly considered. annihilation neglected phenomenology inert doublet pages format changed adde
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non_dup
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[] |
2129882
|
10.1007/JHEP09(2010)047
|
We construct new static, asymptotically AdS solutions where the conformal
infinity is the product of Minkowski spacetime $M_n$ and a sphere $S^m$. Both
globally regular, soliton-type solutions and black hole solutions are
considered. The black holes can be viewed as natural AdS generalizations of the
Schwarzschild black branes in Kaluza-Klein theory. The solitons provide new
brane-world models with compact extra-dimensions. Different from the
Randall-Sundrum single-brane scenario, a Schwarzschild black hole on the Ricci
flat part of these branes does not lead to a naked singularity in the bulk.Comment: 28 pages, 4 figure
|
New AdS solitons and brane worlds with compact extra-dimensions
|
new ads solitons and brane worlds with compact extra-dimensions
|
asymptotically conformal infinity minkowski spacetime sphere globally soliton considered. holes viewed generalizations schwarzschild branes kaluza klein theory. solitons brane extra dimensions. randall sundrum brane schwarzschild ricci branes naked singularity pages
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non_dup
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[] |
2120694
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10.1007/JHEP09(2010)048
|
We study the discovery potential of string resonances decaying to $t\bar{t}$
final state at the LHC. We point out that top quark pair production is a
promising and an advantageous channel for studying such resonances, due to
their low Standard Model background and unique kinematics. We study the
invariant mass distribution and angular dependence of the top pair production
cross section via exchanges of string resonances. The mass ratios of these
resonances and the unusual angular distribution may help identify their
fundamental properties and distinguish them from other new physics. We find
that string resonances for a string scale below 4 TeV can be detected via the
$t\bar{t}$ channel, either from reconstructing the $t\bar{t}$ semi-leptonic
decay or recent techniques in identifying highly boosted tops.Comment: 22 pages, 6 figure
|
Top Quarks as a Window to String Resonances
|
top quarks as a window to string resonances
|
discovery resonances decaying lhc. promising advantageous studying resonances kinematics. exchanges resonances. resonances unusual distinguish physics. resonances reconstructing leptonic identifying boosted pages
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non_dup
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[] |
2116549
|
10.1007/JHEP09(2010)049
|
Recently, Komargodski and Seiberg have proposed a new type of supercurrent
multiplet which contains the energy-momentum tensor and the supersymmetry
current consistently. In this paper we study quantum properties of the
supercurrent in renormalizable field theories. We point out that the new
supercurrent gives a quite simple resolution to the classic problem, called the
anomaly puzzle, that the Adler-Bardeen theorem applied to an R-symmetry current
is inconsistent with all order corrections to $\beta$ functions. We propose an
operator equation for the supercurrent in all orders of perturbation theory,
and then perform several consistency checks of the equation. The operator
equation we propose is consisitent with the one proposed by Shifman and
Vainshtein, if we take some care in interpreting the meaning of non-conserved
currents.Comment: 28 pages; v2:clarifications and references added, some minor change
|
Notes on Operator Equations of Supercurrent Multiplets and the Anomaly
Puzzle in Supersymmetric Field Theories
|
notes on operator equations of supercurrent multiplets and the anomaly puzzle in supersymmetric field theories
|
komargodski seiberg supercurrent multiplet supersymmetry consistently. supercurrent renormalizable theories. supercurrent classic anomaly puzzle adler bardeen inconsistent beta functions. propose supercurrent orders perturbation consistency checks equation. propose consisitent shifman vainshtein interpreting meaning conserved pages clarifications minor
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non_dup
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[] |
2101759
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10.1007/JHEP09(2010)050
|
We develop calculational tools to determine higher loop superstring
correlators involving massless fermionic and spin fields in four space time
dimensions. These correlation functions are basic ingredients for the
calculation of loop amplitudes involving both bosons and fermions in D=4
heterotic and superstring theories. To obtain the full amplitudes in Lorentz
covariant form the loop correlators of fermionic and spin fields have to be
expressed in terms of SO(1,3) tensors. This is one of the main achievements in
this work.Comment: 59 pages, 1 figure; v2: final version published in JHE
|
Higher Loop Spin Field Correlators in D=4 Superstring Theory
|
higher loop spin field correlators in d=4 superstring theory
|
calculational superstring correlators involving massless fermionic dimensions. ingredients amplitudes involving bosons fermions heterotic superstring theories. amplitudes lorentz covariant correlators fermionic tensors. achievements pages
|
non_dup
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[] |
2099676
|
10.1007/JHEP09(2010)051
|
In this work, we review and extend the so-called consistency conditions for
the existence of a braneworld scenario in arbitrary dimensions in the
Brans-Dicke (BD) gravitational theory. After that, we consider the particular
case of a five-dimensional scenario which seems to have phenomenological
interesting implications. We show that, in the BD framework, it is possible to
achieve necessary conditions pointing to the possibility of accommodating
branes with positive tensions in an AdS bulk by the presence of the additional
BD scalar field, avoiding in this way the necessity of including unstable
objects in the compactification scheme. Furthermore, in the context of time
variable brane tension, it is shown that the brane tension may change its sign,
following the bulk cosmological constant sign.Comment: 15 pages, new version to appear in JHE
|
Positive tension 3-branes in an $AdS_{5}$ bulk
|
positive tension 3-branes in an $ads_{5}$ bulk
|
extend consistency braneworld brans dicke gravitational theory. phenomenological implications. pointing accommodating branes tensions avoiding necessity unstable compactification scheme. brane tension brane tension cosmological pages
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non_dup
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[] |
2108746
|
10.1007/JHEP09(2010)052
|
We demonstrate that all tree-level string theory amplitudes can be computed
using the BCFW recursion relations. Our proof utilizes the pomeron vertex
operator introduced by Brower, Polchinski, Strassler, and Tan. Surprisingly, we
find that in a particular large complex momentum limit, the asymptotic
expansion of massless string amplitudes is identical in form to that of the
corresponding field theory amplitudes. This observation makes manifest the fact
that field-theoretic Yang-Mills and graviton amplitudes obey KLT-like
relations. Moreover, we conjecture that in this large momentum limit certain
string theory and field theory amplitudes are identical, and provide evidence
for this conjecture. Additionally, we find a new recursion relation which
relates tachyon amplitudes to lower-point tachyon amplitudes.Comment: 36 pages, JHEP3; reference and note added, improved discussion in
section
|
BCFW Recursion Relations and String Theory
|
bcfw recursion relations and string theory
|
amplitudes bcfw recursion relations. utilizes pomeron brower polchinski strassler tan. surprisingly asymptotic massless amplitudes amplitudes. manifest theoretic mills graviton amplitudes obey relations. conjecture amplitudes conjecture. additionally recursion relates tachyon amplitudes tachyon pages jhep
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non_dup
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[] |
2126934
|
10.1007/JHEP09(2010)053
|
The electromagnetic nucleon form-factors data are studied with artificial
feed forward neural networks. As a result the unbiased model-independent
form-factor parametrizations are evaluated together with uncertainties. The
Bayesian approach for the neural networks is adapted for chi2 error-like
function and applied to the data analysis. The sequence of the feed forward
neural networks with one hidden layer of units is considered. The given neural
network represents a particular form-factor parametrization. The so-called
evidence (the measure of how much the data favor given statistical model) is
computed with the Bayesian framework and it is used to determine the best form
factor parametrization.Comment: The revised version is divided into 4 sections. The discussion of the
prior assumptions is added. The manuscript contains 4 new figures and 2 new
tables (32 pages, 15 figures, 2 tables
|
Neural Network Parameterizations of Electromagnetic Nucleon Form Factors
|
neural network parameterizations of electromagnetic nucleon form factors
|
electromagnetic nucleon artificial feed networks. unbiased parametrizations uncertainties. bayesian adapted analysis. feed hidden considered. parametrization. favor bayesian revised divided sections. assumptions added. tables pages tables
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non_dup
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[] |
2130596
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10.1007/JHEP09(2010)054
|
We study quantum tunneling for the de Sitter radiation in the planar
coordinates and global coordinates, which are nonstationary coordinates and
describe the expanding geometry. Using the phase-integral approximation for the
Hamilton-Jacobi action in the complex plane of time, we obtain the
particle-production rate in both coordinates and derive the additional
sinusoidal factor depending on the dimensionality of spacetime and the quantum
number for spherical harmonics in the global coordinates. This approach
resolves the factor of two problem in the tunneling method.Comment: LaTex 10 pages, no figur
|
The Stokes Phenomenon and Quantum Tunneling for de Sitter Radiation in
Nonstationary Coordinates
|
the stokes phenomenon and quantum tunneling for de sitter radiation in nonstationary coordinates
|
tunneling sitter planar nonstationary expanding geometry. hamilton jacobi derive sinusoidal dimensionality spacetime spherical harmonics coordinates. resolves tunneling latex pages figur
|
non_dup
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[] |
2097788
|
10.1007/JHEP09(2010)055
|
We describe the conditions for extra supersymmetry in N=(2,2) supersymmetric
nonlinear sigma models written in terms of semichiral superfields. We find that
some of these models have additional off-shell supersymmetry. The (4,4)
supersymmetry introduces geometrical structures on the target-space which are
conveniently described in terms of Yano f-structures and Magri-Morosi
concomitants. On-shell, we relate the new structures to the known
bi-hypercomplex structures.Comment: 20 pages; v2: significant corrections, clarifications, and
reorganization; v3: discussion of supersymmetry vs twisted supersymmetry
added, relevant signs corrected
|
Sigma models with off-shell N=(4,4) supersymmetry and noncommuting
complex structures
|
sigma models with off-shell n=(4,4) supersymmetry and noncommuting complex structures
|
extra supersymmetry supersymmetric sigma semichiral superfields. supersymmetry. supersymmetry introduces geometrical conveniently yano magri morosi concomitants. relate hypercomplex pages clarifications reorganization supersymmetry twisted supersymmetry signs corrected
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non_dup
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[] |
2119054
|
10.1007/JHEP09(2010)057
|
A new mechanism to control Planck-scale corrections to the inflationary eta
parameter is proposed. A common approach to the eta problem is to impose a
shift symmetry on the inflaton field. However, this symmetry has to remain
unbroken by Planck-scale effects, which is a rather strong requirement on
possible ultraviolet completions of the theory. In this paper, we show that the
breaking of the shift symmetry by Planck-scale corrections can be
systematically suppressed if the inflaton field interacts with a conformal
sector. The inflaton then receives an anomalous dimension in the conformal
field theory, which leads to sequestering of all dangerous high-energy
corrections. We analyze a number of models where the mechanism can be seen in
action. In our most detailed example we compute the exact anomalous dimensions
via a-maximization and show that the eta problem can be solved using only
weakly-coupled physics.Comment: 34 pages, 3 figures
|
Desensitizing Inflation from the Planck Scale
|
desensitizing inflation from the planck scale
|
planck inflationary proposed. impose inflaton field. unbroken planck requirement ultraviolet completions theory. breaking planck systematically suppressed inflaton interacts conformal sector. inflaton receives anomalous conformal sequestering dangerous corrections. analyze action. anomalous maximization solved weakly pages
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non_dup
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[] |
2128638
|
10.1007/JHEP09(2010)059
|
We propose a new lattice superfield formalism in momentum representation
which accommodates species doublers of the lattice fermions and their bosonic
counterparts as super multiplets. We explicitly show that one dimensional N=2
model with interactions has exact Lie algebraic supersymmetry on the lattice
for all super charges. In coordinate representation the finite difference
operator is made to satisfy Leibnitz rule by introducing a non local product,
the ``star'' product, and the exact lattice supersymmetry is realized. The
standard momentum conservation is replaced on the lattice by the conservation
of the sine of the momentum, which plays a crucial role in the formulation.
Half lattice spacing structure is essential for the one dimensional model and
the lattice supersymmetry transformation can be identified as a half lattice
spacing translation combined with alternating sign structure. Invariance under
finite translations and locality in the continuum limit are explicitly
investigated and shown to be recovered. Supersymmetric Ward identities are
shown to be satisfied at one loop level. Lie algebraic lattice supersymmetry
algebra of this model suggests a close connection with Hopf algebraic exactness
of the link approach formulation of lattice supersymmetry.Comment: 34 pages, 2 figure
|
Species Doublers as Super Multiplets in Lattice Supersymmetry: Exact
Supersymmetry with Interactions for D=1 N=2
|
species doublers as super multiplets in lattice supersymmetry: exact supersymmetry with interactions for d=1 n=2
|
propose superfield formalism accommodates doublers fermions bosonic counterparts super multiplets. explicitly algebraic supersymmetry super charges. coordinate satisfy leibnitz introducing supersymmetry realized. conservation replaced conservation sine plays crucial formulation. spacing supersymmetry spacing translation alternating structure. invariance translations locality continuum explicitly recovered. supersymmetric ward identities satisfied level. algebraic supersymmetry connection hopf algebraic exactness formulation pages
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non_dup
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2132050
|
10.1007/JHEP09(2010)060
|
Sterile neutrinos have been invoked to explain the observed neutrino masses,
but they can also have significant implications for cosmology and accelerator
experiments. We explore the collider signatures of a simple extension of the
Standard Model, where sterile neutrinos acquire their mass after electroweak
symmetry breaking, via their coupling to a real singlet Higgs. In this model,
heavy sterile neutrinos can be produced in accelerators from decays of the
Higgs bosons. Their own decay can yield distinct signals, suggesting both the
presence of an extended Higgs sector and the coupling of the singlet fermions
to the latter. In the same scenario, a relic matter abundance arises from the
decay of the singlet Higgs into weakly coupled keV sterile neutrinos. The
coupling of the Higgs doublet to particles outside the Standard Model relaxes
the current experimental bounds on its mass.Comment: v2: JHEP accepted version, 19 pages, 9 figure
|
Collider signatures of sterile neutrinos in models with a gauge-singlet
Higgs
|
collider signatures of sterile neutrinos in models with a gauge-singlet higgs
|
sterile neutrinos invoked cosmology accelerator experiments. explore collider signatures sterile neutrinos acquire electroweak breaking singlet higgs. sterile neutrinos accelerators decays bosons. singlet fermions latter. relic abundance arises singlet weakly sterile neutrinos. doublet relaxes bounds jhep pages
|
non_dup
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[] |
2125462
|
10.1007/JHEP09(2010)061
|
We investigate extremal Reissner-Nordstrom-AdS black holes in
four-dimensional N=2 abelian gauged supergravity. We find a new attractor
equation which is not reduced to the one in the asymptotically flat spacetime.
Focusing on so-called the T^3-model with a single neutral vector multiplet, we
obtain non-supersymmetric extremal Reissner-Nordstrom-AdS black hole solutions
with regular event horizon in the D0-D4 and the D2-D6 charge configurations.
The negative cosmological constant emerges even without the Fayet-Iliopoulos
parameters. Furthermore, we also argue the formal description of the
non-supersymmetric black hole solutions of the T^3-model and the STU-model in
generic configurations.Comment: 23 pages, accepted version in JHE
|
Non-supersymmetric Extremal RN-AdS Black Holes in N=2 Gauged
Supergravity
|
non-supersymmetric extremal rn-ads black holes in n=2 gauged supergravity
|
extremal reissner nordstrom holes abelian gauged supergravity. attractor asymptotically spacetime. focusing neutral multiplet supersymmetric extremal reissner nordstrom horizon configurations. cosmological emerges fayet iliopoulos parameters. argue formal supersymmetric generic pages
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non_dup
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2134153
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10.1007/JHEP09(2010)062
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We compute quantum corrections to finite-size effects for various dyonic
giant magnons in the AdS_4 x CP^3 in two different approaches. The off-shell
algebraic curve method is used to quantize the classical string configurations
in semi-classical way and to compute the corrections to the string energies.
These results are compared with the F-term L\"uscher formula based on the
S-matrix of the AdS_4 / CFT_3. The fact that the two results match exactly
provides another stringent test for the all-loop integrability conjecture and
the exact S-matrix based on it.Comment: 21 pages, No figures, corrected typos, added some reference
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Quantum finite-size effects for dyonic magnons in the AdS_4 x CP^3
|
quantum finite-size effects for dyonic magnons in the ads_4 x cp^3
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dyonic giant magnons approaches. algebraic quantize configurations energies. uscher match stringent integrability conjecture pages corrected typos
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2132758
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10.1007/JHEP09(2010)065
|
We construct an MSSM with three generations from the heterotic string
compactified on a smooth 6D internal manifold using Abelian gauge fluxes only.
The compactification space is obtained as a resolution of the T6/Z2xZ2xZ2-free
orbifold. The Z2-free involution of such a resolution breaks the SU(5) GUT
group down to the SM gauge group using a suitably chosen (freely acting) Wilson
line. Surprisingly, the spectrum on a given resolution is larger than the one
on the corresponding orbifold taking into account the branching and Higgsing
due to the blow-up modes. The existence of extra resolution states is closely
related to the fact that the resolution procedure is not unique. Rather, the
various resolutions are connected to each other by flop transitions.Comment: 59 pages, 7 figure
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Heterotic MSSM on a Resolved Orbifold
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heterotic mssm on a resolved orbifold
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mssm generations heterotic compactified manifold abelian fluxes only. compactification orbifold. involution breaks suitably freely acting wilson line. surprisingly orbifold branching higgsing blow modes. extra closely unique. resolutions flop pages
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non_dup
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2094700
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10.1007/JHEP09(2010)068
|
The list of six previously known nontrivial stationary points in the scalar
potential of N=8, D=4 supergravity with gauge group SO(8) is extended by
fourteen new entries, whose properties have been obtained numerically using the
sensitivity backpropagation technique. Eight of the new solutions break the
gauge group completely, while three have a residual symmetry of U(1). Three
further ones break the gauge group to U(1)xU(1), and while the approximate
numerical data are somewhat inconclusive, there is evidence that one of these
may have a residual N=1 supersymmetry, hence correspond to a stable vacuum. It
must be pointed out that this list of new solutions most likely is not
exhaustive.Comment: 23 pages; typo fixes and some adjustments to text; fermion mass
matrix eigenvalues liste
|
Fourteen new stationary points in the scalar potential of SO(8)-gauged
N=8, D=4 supergravity
|
fourteen new stationary points in the scalar potential of so(8)-gauged n=8, d=4 supergravity
|
nontrivial stationary supergravity fourteen entries numerically backpropagation technique. eight break residual break approximate somewhat inconclusive residual supersymmetry vacuum. pointed pages typo fixes adjustments fermion eigenvalues liste
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non_dup
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2137737
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10.1007/JHEP09(2010)069
|
In order to study the influence of compactness on low-energy properties, we
compare the phase structures of the compact and non-compact two-dimensional
multi-frequency sine-Gordon models. It is shown that the high-energy scaling of
the compact and non-compact models coincides, but their low-energy behaviors
differ. The critical frequency $\beta^2 = 8\pi$ at which the sine-Gordon model
undergoes a topological phase transition is found to be unaffected by the
compactness of the field since it is determined by high-energy scaling laws.
However, the compact two-frequency sine-Gordon model has first and second order
phase transitions determined by the low-energy scaling: we show that these are
absent in the non-compact model.Comment: 21 pages, 5 figures, minor changes, final version, accepted for
publication in JHE
|
Phase Structure and Compactness
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phase structure and compactness
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compactness sine gordon models. coincides behaviors differ. beta sine gordon undergoes topological unaffected compactness laws. sine gordon absent pages minor publication
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non_dup
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[] |
2129941
|
10.1007/JHEP09(2010)070
|
Resorting to the notion of a stress tensor induced on the boundary of a
spacetime, we compute the conserved charges associated to exact solutions of
New Massive Gravity that obey weakened versions of AdS_3 asymptotic boundary
conditions. The computation requires the introduction of additional
counterterms, which play the role of regularizing the semiclassical stress
tensor in the boundary theory. We show that, if treated appropriately,
different ways of prescribing asymptotically AdS_3 boundary conditions yield
finite conserved charges for the solutions. The consistency of the construction
manifests itself in that the charges of hairy asymptotically AdS_3 black holes
computed by this holography-inspired method exactly match the values required
for the Cardy formula to reproduce the black hole entropy. We also consider new
solutions to the equations of motion of New Massive Gravity, which happen to
fulfill Brown-Henneaux boundary conditions despite not being Einstein
manifolds. These solutions are shown to yield vanishing boundary stress tensor.
The results obtained in this paper can be regarded as consistency checks for
the prescription proposed in arXiv:1001.3598.Comment: 13 pages. v2 minor typos correcte
|
Boundary stress tensor and counterterms for weakened AdS_3 asymptotic in
New Massive Gravity
|
boundary stress tensor and counterterms for weakened ads_3 asymptotic in new massive gravity
|
resorting notion spacetime conserved charges massive obey weakened versions asymptotic conditions. counterterms regularizing semiclassical theory. appropriately ways prescribing asymptotically conserved charges solutions. consistency manifests charges hairy asymptotically holes holography inspired match cardy reproduce entropy. massive happen fulfill brown henneaux einstein manifolds. vanishing tensor. regarded consistency checks prescription pages. minor typos correcte
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non_dup
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2135297
|
10.1007/JHEP09(2010)071
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Starting from the standard Lagrangian for a SU(2) x U(1) gauge theory plus a
Higgs field we derive the corresponding "maximal helicity violating" (MHV)
Lagrangian. From this MHV Lagrangian one deduces simple diagrammatic rules for
the calculation of multi-particle scattering amplitudes. We arrive at the MHV
Lagrangian by a canonical change of the field variables in the light-cone
gauge. We comment on the modifications which occur in a spontaneously broken
gauge theory as compared to a pure (unbroken) Yang-Mills theory.Comment: 29 page
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The MHV Lagrangian for a spontaneously broken gauge theory
|
the mhv lagrangian for a spontaneously broken gauge theory
|
lagrangian derive maximal helicity violating lagrangian. lagrangian deduces diagrammatic amplitudes. arrive lagrangian canonical cone gauge. comment modifications spontaneously broken unbroken mills
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non_dup
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[] |
2134229
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10.1007/JHEP09(2010)072
|
We construct the full set of boundary giant magnons on $\mathbb{R}\times
S^{2}$ attached to the maximal $Z=0$ giant graviton by mapping from the general
solution to static sine-Gordon theory on the interval and compute the values of
$\Delta-J$ at finite $J$, including the leading order corrections when $J$ is
large. We then consider the Born-Infeld theory of the giant graviton itself to
construct BIon spike solutions that correspond to the world volume description
of the boundary giant magnons at finite $J$.Comment: 35 pages, 10 figures. Minor corrections onl
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Boundary Giant Magnons and Giant Gravitons
|
boundary giant magnons and giant gravitons
|
giant magnons mathbb attached maximal giant graviton sine gordon delta large. born infeld giant graviton bion spike giant magnons .comment pages figures. minor
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non_dup
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[] |
2140656
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10.1007/JHEP09(2010)075
|
We investigate coordinate independent SO(9) vector states in SU(2) Matrix
theory. There are 36 vector states, and we determine what representations of
SU(2) they are decomposed into. Among them we find a unique set of states
transforming in adjoint representation. We show that this set of states can
appear as the linear term in the coordinate matrices in Taylor expansion of
zero energy bound state wavefunction around the origin i.e. it satisfies the
condition of full supersymmetry.Comment: 21 pages, no figure, v2: minor correction v3: signs in (3.46) and
(3.51) corrected, further calculation on the linear term of the expansion of
the wavefunction added, and the conclusion about it changed, v3: minor change
in the references, version published in JHE
|
On gauge transformation property of coordinate independent SO(9) vector
states in SU(2) Matrix Theory
|
on gauge transformation property of coordinate independent so(9) vector states in su(2) matrix theory
|
coordinate theory. representations decomposed into. transforming adjoint representation. coordinate taylor wavefunction i.e. satisfies pages minor signs corrected wavefunction changed minor
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non_dup
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[] |
2129933
|
10.1007/JHEP09(2010)076
|
We map out possible extensions of the MSSM in the context of type II string
theory. We systematically investigate three-stack and four-stack quivers which
realize the MSSM spectrum with the addition of a single MSSM singlet S with an
allowed S H_u H_d term, which can lead to a dynamical electroweak-scale
mu-term. We present the three quivers which satisfy stringent string-theoretic
and phenomenological constraints, including the presence of non-zero masses for
all three families of quarks and leptons, the perturbative and non-perturbative
absence of R-parity violating couplings and rapid dimension-five proton decay,
and a mechanism for small neutrino masses. We find that these quivers can
realize many models in the class of singlet-extended (supersymmetric) standard
models, as D-instanton effects can in principle generate a superpotential of
the form f(S), where f is a polynomial. Finally, we address the issue of the
stabilization and decoupling of charged moduli which generically appear in
D-instanton corrections to the superpotential.Comment: 15 pages, plus references. Version 2: accepted to JHE
|
Singlet Extensions of the MSSM in the Quiver Landscape
|
singlet extensions of the mssm in the quiver landscape
|
extensions mssm theory. systematically stack stack quivers realize mssm mssm singlet electroweak term. quivers satisfy stringent theoretic phenomenological families quarks leptons perturbative perturbative parity violating couplings proton masses. quivers realize singlet supersymmetric instanton superpotential polynomial. stabilization decoupling moduli generically instanton pages references.
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non_dup
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2117246
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10.1007/JHEP09(2010)078
|
We investigate the MSSM with very large tan(beta) > 50, where the fermion
masses are strongly affected by loop-induced couplings to the "wrong" Higgs,
imposing perturbative Yukawa couplings and constraints from flavour physics.
Performing a low-energy scan of the MSSM with flavour-blind soft terms, we find
that the branching ratio of B->tau nu and the anomalous magnetic moment of the
muon are the strongest constraints at very large tan(beta) and identify the
viable regions in parameter space. Furthermore we determine the scale at which
the perturbativity of the Yukawa sector breaks down, depending on the
low-energy MSSM parameters. Next, we analyse the very large tan(beta) regime of
General Gauge Mediation (GGM) with a low mediation scale. We investigate the
requirements on the parameter space and discuss the implied flavour
phenomenology. We point out that the possibility of a vanishing Bmu term at a
mediation scale M = 100 TeV is challenged by the experimental data on B->tau nu
and the anomalous magnetic moment of the muon.Comment: 29 pages, 7 figures. v2: discussion in sections 1 and 4 expanded,
conclusions unchanged. Matches version published in JHE
|
Viability of MSSM scenarios at very large tan(beta)
|
viability of mssm scenarios at very large tan(beta)
|
mssm beta fermion couplings wrong imposing perturbative yukawa couplings flavour physics. performing scan mssm flavour blind branching anomalous moment muon strongest beta viable space. perturbativity yukawa breaks mssm parameters. analyse beta mediation mediation scale. implied flavour phenomenology. vanishing mediation challenged anomalous moment pages figures. expanded unchanged. matches
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non_dup
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[] |
2124051
|
10.1007/JHEP09(2010)079
|
The prospects for making a direct measurement of the W production charge
asymmetry at the LHC are discussed. A modification to the method used at the
Tevatron is proposed for measurements at the LHC. The expected sensitivity for
such a measurement to parton distribution functions is compared to that for a
measurement of the lepton charge asymmetry. The direct measurement approach is
found to be less useful for placing constraints on parton distribution
functions at the LHC than a measurement of the lepton charge asymmetry.Comment: 18 pages, 10 figures, v2: references and keywords updated v3:
Additional paragraph discussing inclusion of W asymmetry in global fits adde
|
On direct measurement of the W production charge asymmetry at the LHC
|
on direct measurement of the w production charge asymmetry at the lhc
|
prospects asymmetry discussed. modification tevatron lhc. parton lepton asymmetry. placing parton lepton pages keywords updated paragraph discussing inclusion asymmetry fits adde
|
non_dup
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[] |
2135764
|
10.1007/JHEP09(2010)080
|
Stationary black holes of massless supergravity theories are described by
certain geodesic curves on the target space that is obtained after dimensional
reduction over time. When the target space is a symmetric coset space we make
use of the group-theoretical structure to prove that the second order geodesic
equations are integrable in the sense of Liouville, by explicitly constructing
the correct amount of Hamiltonians in involution. This implies that the
Hamilton-Jacobi formalism can be applied, which proves that all such black hole
solutions, including non-extremal solutions, possess a description in terms of
a (fake) superpotential. Furthermore, we improve the existing integration
method by the construction of a Lax integration algorithm that integrates the
second order equations in one step instead of the usual two step procedure. We
illustrate this technology with a specific example.Comment: 44 pages, small typos correcte
|
Black holes in supergravity and integrability
|
black holes in supergravity and integrability
|
stationary holes massless supergravity geodesic time. coset geodesic integrable liouville explicitly constructing hamiltonians involution. hamilton jacobi formalism proves extremal possess fake superpotential. integrates usual procedure. illustrate pages typos correcte
|
non_dup
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[] |
2131788
|
10.1007/JHEP09(2010)081
|
In the vortex background on a sphere, a single 6-dimensional fermion family
gives rise to 3 zero-modes in the 4-dimensional point of view, which may
explain the replication of families in the Standard Model. Previously, it had
been shown that realistic hierarchical mass and mixing patterns can be
reproduced for the quarks and the charged leptons. Here, we show that the
addition of a single heavy 6-dimensional field that is gauge singlet, unbound
to the vortex, and embedded with a bulk Majorana mass enables to generate 4D
Majorana masses for the light neutrinos through the see-saw mechanism. The
scheme is very predictive. The hierarchical structure of the fermion zero-modes
leads automatically to an inverted pseudo-Dirac mass pattern, and always
predicts one maximal angle in the neutrino see-saw matrix. It is possible to
obtain a second large mixing angle from either the charged lepton or the
neutrino sector, and we demonstrate that this model can fit all observed data
in neutrino oscillations experiments. Also, U_{e3} is found to be of the order
~0.1.Comment: 23 pages, 1 figur
|
See-saw neutrino masses and large mixing angles in the vortex background
on a sphere
|
see-saw neutrino masses and large mixing angles in the vortex background on a sphere
|
vortex sphere fermion replication families model. realistic hierarchical reproduced quarks leptons. singlet unbound vortex embedded majorana enables majorana neutrinos mechanism. predictive. hierarchical fermion automatically inverted pseudo dirac predicts maximal matrix. lepton oscillations experiments. pages figur
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non_dup
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[] |
2125288
|
10.1007/JHEP09(2010)082
|
In this paper we compute the holographic boundary entropy for half-BPS Janus
deformations of the $AdS_3\times S^3\times T^4$ vacuum of type IIB
supergravity. Previous work \cite{Chiodaroli:2009yw} has shown that there are
two independent deformations of this sort. In one case, the six-dimensional
dilaton jumps across the interface, while the other case displays a jump of
axion and four-form potential. In case of a jump of the six-dimensional
dilaton, it is possible to compare the holographic result with the
weak-coupling result for a two-dimensional interface CFT where the radii of the
compactified bosons jump across the interface. We find exact agreement between
holographic and CFT results. This is to be contrasted with the holographic
calculation for the non-supersymmetric Janus solution, which agrees with the
CFT result only at the leading order in the jump parameter. We also examine the
implications of the holographic calculation in case of a solution with a jump
in the axion, which can be associated with a deformation of the CFT by the
$Z_2$-orbifold twist operator.Comment: 35 pages, pdf-LaTeX, 5 figures, v2: minor changes, typos corrected,
reference adde
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Boundary entropy of supersymmetric Janus solutions
|
boundary entropy of supersymmetric janus solutions
|
holographic janus deformations supergravity. cite chiodaroli deformations sort. dilaton jumps displays jump axion potential. jump dilaton holographic radii compactified bosons jump interface. holographic results. contrasted holographic supersymmetric janus agrees jump parameter. examine holographic jump axion deformation orbifold twist pages latex minor typos corrected adde
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non_dup
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[] |
2128736
|
10.1007/JHEP09(2010)084
|
Hadronic observables in Z+jet events can be subject to large NLO corrections
at TeV scales, with K-factors that even reach values of order 50 in some cases.
We develop a method, LoopSim, by which approximate NNLO predictions can be
obtained for such observables, supplementing NLO Z+jet and NLO Z+2-jet results
with a unitarity-based approximation for missing higher loop terms. We first
test the method against known NNLO results for Drell-Yan lepton pt spectra. We
then show our approximate NNLO results for the Z+jet observables. Finally we
examine whether the LoopSim method can provide useful information even in cases
without giant K-factors, with results for observables in dijet events that can
be compared to early LHC data.Comment: 38 pages, 13 figures; v2 includes additional reference
|
Giant QCD K-factors beyond NLO
|
giant qcd k-factors beyond nlo
|
hadronic observables cases. loopsim approximate nnlo observables supplementing unitarity missing terms. nnlo drell lepton spectra. approximate nnlo observables. examine loopsim giant observables dijet pages
|
non_dup
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[] |
2133706
|
10.1007/JHEP09(2010)085
|
In the Next-to-Minimal Supersymmetric Standard Model, a bino-like LSP can be
as light as a few GeV and satisfy WMAP constraints on the dark matter relic
density in the presence of a light CP-odd Higgs scalar. We study upper bounds
on the direct detection cross sections for such a light LSP in the mass range
2-20 GeV in the NMSSM, respecting all constraints from B-physics and LEP. The
OPAL constraints on e^+ e^- -> \chi^0_1 \chi^0_i (i > 1) play an important role
and are discussed in some detail. The resulting upper bounds on the
spin-independent and spin-dependent nucleon cross sections are ~ 10^{-42}
cm^{-2} and ~ 4\times 10^{-40} cm^{-2}, respectively. Hence the upper bound on
the spin-independent cross section is below the DAMA and CoGeNT regions, but
could be compatible with the two events observed by CDMS-II.Comment: 17 pages, 3 figure
|
Light dark matter in the NMSSM: upper bounds on direct detection cross
sections
|
light dark matter in the nmssm: upper bounds on direct detection cross sections
|
supersymmetric bino satisfy wmap relic scalar. bounds nmssm respecting lep. opal detail. bounds nucleon respectively. dama cogent compatible cdms pages
|
non_dup
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[] |
2133145
|
10.1007/JHEP09(2010)086
|
One way to model the strange metal phase of certain materials is via a
holographic description in terms of probe D-branes in a Lifshitz spacetime,
characterised by a dynamical exponent z. The background geometry is dual to a
strongly-interacting quantum critical theory while the probe D-branes are dual
to a finite density of charge carriers that can exhibit the characteristic
properties of strange metals. We compute holographically the low-frequency and
low-momentum form of the charge density and current retarded Green's functions
in these systems for massless charge carriers. The results reveal a
quasi-particle excitation when z<2, which in analogy with Landau Fermi liquids
we call zero sound. The real part of the dispersion relation depends on
momentum k linearly, while the imaginary part goes as k^2/z. When z is greater
than or equal to 2 the zero sound is not a well-defined quasi-particle. We also
compute the frequency-dependent conductivity in arbitrary spacetime dimensions.
Using that as a measure of the charge current spectral function, we find that
the zero sound appears only when the spectral function consists of a single
delta function at zero frequency.Comment: 20 pages, v2 minor corrections, extended discussion in sections 5 and
6, added one footnote and four references, version published in JHE
|
Zero Sound in Strange Metallic Holography
|
zero sound in strange metallic holography
|
strange holographic branes lifshitz spacetime characterised exponent interacting branes carriers exhibit strange metals. holographically retarded massless carriers. reveal quasi analogy landau fermi liquids call sound. linearly imaginary goes sound quasi particle. conductivity spacetime dimensions. sound delta pages minor footnote
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non_dup
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