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42713921
|
10.1007/JHEP08(2016)051
|
We calculate 1-loop corrections to the Schwinger-Keldysh propagators of
Standard-Model-like fields of spin-0, 1/2, and 1, with all renormalizable
interactions during inflation. We pay special attention to the late-time
divergences of loop corrections, and show that the divergences can be resummed
into finite results in the late-time limit using dynamical renormalization
group method. This is our first step toward studying both the standard model
and new physics in the primordial universe.Comment: 34 pages. Typos corrected. Discussions in Sec. 5 expanded. JHEP
published versio
|
Loop Corrections to Standard Model Fields in Inflation
|
loop corrections to standard model fields in inflation
|
schwinger keldysh propagators renormalizable inflation. divergences divergences resummed renormalization method. toward studying primordial pages. typos corrected. discussions sec. expanded. jhep versio
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[] |
42710672
|
10.1007/JHEP08(2016)052
|
Heavy right-handed neutrinos (RHNs) provide the simplest explanation for the
origin of light neutrino masses and mixings. If the RHN masses are at or below
the weak scale, direct experimental discovery of these states is possible at
accelerator experiments such as the LHC or new dedicated beam dump experiments;
in such experiments, the RHN decays after traversing a macroscopic distance
from the collision point. The experimental sensitivity to RHNs is significantly
enhanced if there is a new "dark" gauge force connecting them to the Standard
Model (SM), and detection of RHNs can be the primary discovery mode for the new
dark force itself. We take the well-motivated example of a B-L gauge symmetry
and analyze the sensitivity to displaced decays of the RHNs produced via the
new gauge interaction in two experiments: the LHC and the proposed SHiP beam
dump experiment. In the most favorable case in which the mediator can be
produced on-shell and decays to RHNs, the sensitivity reach is controlled by
the square of the B-L gauge coupling. We demonstrate that these experiments
could access neutrino parameters responsible for the observed SM neutrino
masses and mixings in the most straightforward implementation of the see-saw
mechanism.Comment: 16 pages, 12 figures. v2: final version published in JHE
|
Shedding Light on Neutrino Masses with Dark Forces
|
shedding light on neutrino masses with dark forces
|
handed neutrinos rhns simplest explanation mixings. discovery accelerator dedicated dump decays traversing macroscopic collision point. rhns connecting rhns discovery itself. motivated analyze displaced decays rhns ship dump experiment. favorable mediator decays rhns coupling. mixings straightforward pages figures.
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42733074
|
10.1007/JHEP08(2016)054
|
It has been shown recently that the anomalies observed in $\bar B\to
D^{(\ast)}\tau\bar\nu_\tau$ and $\bar B\to \bar K\ell^+\ell^-$ decays could be
resolved with just one scalar leptoquark. Fitting to the current data on
$R(D^{(\ast)})$ along with acceptable $q^2$ distributions in $\bar B\to
D^{(\ast)}\tau\bar\nu_\tau$ decays, four best-fit solutions for the operator
coefficients have been found. In this paper, we explore the possibilities of
how to discriminate these four solutions. Firstly, we find that two of them are
already excluded by the decay $B_c^-\to \tau^-\bar\nu_\tau$, because the
predicted decay widths have already overshot the total width $\Gamma_{B_c}$. It
is then found that the remaining two solutions result in two effective
Hamiltonians governing $b\to c \tau \bar\nu_{\tau}$ transition, which differ by
a sign and enhance the absolute value of the coefficient of $\bar c_L\gamma_\mu
b_L\,\bar \tau_L\gamma^\mu{\nu_\tau}_L$ operator by about $12\%$. However, they
give nearly the same predictions as in the SM for the $D^\ast$ and $\tau$
longitudinal polarizations as well as the lepton forward-backward asymmetries
in $\bar B\to D^{(\ast)}\tau\bar\nu_\tau$ decays. For the other observables
like $\mathcal B(B_c^-\to \tau^-\bar\nu_\tau)$, $\mathcal B(B_c^- \to
\gamma\tau^-\bar\nu_\tau)$, $R_{D^{(\ast)}}(q^2)$, ${\rm d}\mathcal B(\bar B\to
D^{(\ast)}\tau\bar\nu_\tau)/{\rm d}q^2$ and $\mathcal B(\bar B\to
X_c\tau\bar\nu_\tau)$, on the other hand, the two solutions give sizable
enhancements relative to the SM predictions. With measurement of $B_c^-\to
\tau^-\bar\nu_\tau$ at LHCb and refined measurements of observables in $\bar
B\to D^{(\ast)}\tau\bar\nu_\tau$ at both LHCb and Belle-II, such a specific NP
scenario could be further deciphered.Comment: 30 pages, 7 figures, 4 tables; More references added; One plot, more
references and discussions added, final version to be published in JHE
|
Revisiting the one leptoquark solution to the $R(D^{(\ast)})$ anomalies
and its phenomenological implications
|
revisiting the one leptoquark solution to the $r(d^{(\ast)})$ anomalies and its phenomenological implications
|
anomalies decays resolved leptoquark. fitting acceptable decays found. explore possibilities discriminate solutions. firstly excluded widths overshot gamma hamiltonians governing enhance gamma gamma nearly longitudinal polarizations lepton backward asymmetries decays. observables mathcal mathcal gamma mathcal mathcal sizable enhancements predictions. lhcb refined observables lhcb belle pages tables discussions
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42643476
|
10.1007/JHEP08(2016)056
|
We study two dimensional conformal field theories in the semiclassical limit.
In this limit, the four-point function is dominated by intermediate primaries
of particular weights along with their descendants, and the crossing equations
simplify drastically. For a four-point function receiving sufficiently small
contributions from the light primaries, the structure constants involving heavy
primaries follow a universal formula. Applying our results to the four-point
function of the $\mathbb Z_2$ twist field in the symmetric product orbifold, we
produce the Hellerman bound and the logarithmically corrected Cardy formula
that is valid for $h \geq c/12$.Comment: 32 pages, 7 figures. v2, v3: references added, minor clarification
|
Bootstrapping 2D CFTs in the Semiclassical Limit
|
bootstrapping 2d cfts in the semiclassical limit
|
conformal semiclassical limit. dominated primaries weights descendants crossing simplify drastically. receiving sufficiently primaries involving primaries universal formula. mathbb twist orbifold hellerman logarithmically corrected cardy valid .comment pages figures. minor clarification
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42664380
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10.1007/JHEP08(2016)057
|
We examine in greater detail the recent proposal of using superconductors for
detecting dark matter as light as the warm dark matter limit of O(keV).
Detection of such light dark matter is possible if the entire kinetic energy of
the dark matter is extracted in the scattering, and if the experiment is
sensitive to O(meV) energy depositions. This is the case for Fermi-degenerate
materials in which the Fermi velocity exceeds the dark matter velocity
dispersion in the Milky Way of ~10^-3. We focus on a concrete experimental
proposal using a superconducting target with a transition edge sensor in order
to detect the small energy deposits from the dark matter scatterings.
Considering a wide variety of constraints, from dark matter self-interactions
to the cosmic microwave background, we show that models consistent with
cosmological/astrophysical and terrestrial constraints are observable with such
detectors. A wider range of viable models with dark matter mass below an MeV is
available if dark matter or mediator properties (such as couplings or masses)
differ at BBN epoch or in stellar interiors from those in superconductors. We
also show that metal targets pay a strong in-medium suppression for kinetically
mixed mediators; this suppression is alleviated with insulating targets.Comment: 40 pages, 10 figures; v2: updated figures, matches published versio
|
Detecting Superlight Dark Matter with Fermi-Degenerate Materials
|
detecting superlight dark matter with fermi-degenerate materials
|
examine proposal superconductors detecting warm depositions. fermi degenerate fermi exceeds milky concrete proposal superconducting sensor detect deposits scatterings. cosmic microwave cosmological astrophysical terrestrial observable detectors. wider viable mediator couplings epoch interiors superconductors. targets suppression kinetically mediators suppression alleviated insulating pages updated matches versio
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42703325
|
10.1007/JHEP08(2016)058
|
There exists a vast literature examining the electroweak (EW) fine-tuning
problem in supersymmetric scenarios, but little concerned with the dark matter
(DM) one, which should be combined with the former. In this paper, we study
this problem in an, as much as possible, exhaustive and rigorous way. We have
considered the MSSM framework, assuming that the LSP is the lightest
neutralino, $\chi_1^0$, and exploring the various possibilities for the mass
and composition of $\chi_1^0$, as well as different mechanisms for annihilation
of the DM particles in the early Universe (well-tempered neutralinos, funnels
and co-annihilation scenarios). We also present a discussion about the
statistical meaning of the fine-tuning and how it should be computed for the DM
abundance, and combined with the EW fine-tuning. The results are very robust
and model-independent and favour some scenarios (like the h-funnel when
$M_{\chi_1^0}$ is not too close to $m_h/2$) with respect to others (such as the
pure wino case). These features should be taken into account when one explores
"natural SUSY" scenarios and their possible signatures at the LHC and in DM
detection experiments.Comment: 28 pages, 18 figures. References added, matches JHEP published
versio
|
Naturalness of MSSM dark matter
|
naturalness of mssm dark matter
|
vast examining electroweak fine tuning supersymmetric scenarios concerned former. exhaustive rigorous way. mssm lightest neutralino exploring possibilities annihilation universe tempered neutralinos funnels annihilation scenarios meaning fine tuning abundance fine tuning. robust favour scenarios funnel wino explores susy scenarios signatures pages figures. matches jhep versio
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42727979
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10.1007/JHEP08(2016)059
|
We study three-dimensional ${\mathcal N}=2$ supersymmetric gauge theories on
${\Sigma_g \times S^1}$ with a topological twist along $\Sigma_g$, a genus-$g$
Riemann surface. The twisted supersymmetric index at genus $g$ and the
correlation functions of half-BPS loop operators on $S^1$ can be computed
exactly by supersymmetric localization. For $g=1$, this gives a simple UV
computation of the 3d Witten index. Twisted indices provide us with a clean
derivation of the quantum algebra of supersymmetric Wilson loops, for any
Yang-Mills-Chern-Simons-matter theory, in terms of the associated Bethe
equations for the theory on ${\mathbb R}^2 \times S^1$. This also provides a
powerful and simple tool to study 3d ${\mathcal N}=2$ Seiberg dualities.
Finally, we study A- and B-twisted indices for ${\mathcal N}=4$ supersymmetric
gauge theories, which turns out to be very useful for quantitative studies of
three-dimensional mirror symmetry. We also briefly comment on a relation
between the $S^2 \times S^1$ twisted indices and the Hilbert series of
${\mathcal N}=4$ moduli spaces.Comment: 66 pages plus appendix; v2: corrected typos and added reference
|
Comments on twisted indices in 3d supersymmetric gauge theories
|
comments on twisted indices in 3d supersymmetric gauge theories
|
mathcal supersymmetric sigma topological twist sigma genus riemann surface. twisted supersymmetric genus supersymmetric localization. witten index. twisted indices clean derivation supersymmetric wilson loops mills chern simons bethe mathbb powerful mathcal seiberg dualities. twisted indices mathcal supersymmetric turns mirror symmetry. briefly comment twisted indices hilbert mathcal moduli pages corrected typos
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42741825
|
10.1007/JHEP08(2016)060
|
Models in which the 750 GeV resonance ($S$) decays to two light axion-like
particles (ALPs $a$), which in turn decay to collimated photons mimicking the
observed signal, are motivated by Hidden Valley scenarios and could also
provide a mechanism by which a $S \to \gamma \gamma$ signal persists while $S
\to Z \gamma,\; ZZ$ and $WW$ remain subdued in the near future. We point out
that these Hidden Valley like models invoking $S \to aa \to 4 \gamma$ must also
contend with $Z \to a (\to \gamma \gamma) \gamma$ constraints coming from CDF
and ATLAS. Within an effective field theory framework, we work out the
constraints on the couplings of $S$ to $a$ and gauge bosons coming from
photonic $Z$ decays and ensuring that the ALPs decay inside the electromagnetic
calorimeter, in two regimes - where $a$ decays primarily to photons, and where
$a$ also has hadronic branchings. The analysis is done for both when $S$ has a
large as well as a narrow width, and for different relative contributions to
the signal coming from $S \to \gamma \gamma$ and $a \to \gamma \gamma$. Results
for the particular case where $S$ and $a$ belong to the same complex field are
also presented. A $\gamma\gamma$ resonance at the $Z$-pole coming from $Z \to a
\gamma$ is expected in this class of models. Taking benchmark ALP masses below
around 0.4 GeV and, assuming reasonable values for the fake jet rate and the
identification efficiency of the photon-jet, we find the prospects for the
discovery of diphotons at the $Z$-pole.Comment: 19 pages, 11 figure
|
Diphotons at the $Z$-pole in Models of the 750 GeV Resonance Decaying to
Axion-Like Particles
|
diphotons at the $z$-pole in models of the 750 gev resonance decaying to axion-like particles
|
decays axion alps collimated photons mimicking motivated hidden valley scenarios gamma gamma persists gamma subdued future. hidden valley invoking gamma contend gamma gamma gamma coming atlas. couplings bosons coming photonic decays ensuring alps electromagnetic calorimeter regimes decays primarily photons hadronic branchings. narrow coming gamma gamma gamma gamma belong presented. gamma gamma pole coming gamma models. benchmark reasonable fake prospects discovery diphotons pages
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42703771
|
10.1007/JHEP08(2016)061
|
In this paper, we solved numerically the Quantum Spectral Curve (QSC)
equations corresponding to some twist-2 single trace operators with even spin
from the $sl(2)$ sector of $AdS_5/CFT_4$ correspondence. We describe all
technical details of the numerical method which are necessary to implement it
in C++ language.
In the $S=2,4,6,8$ cases, our numerical results confirm the analytical
results, known in the literature for the first 4 coefficients of the strong
coupling expansion for the anomalous dimensions of twist-2 operators. In the
case of the Konishi operator, due to the high precision of the numerical data
we could give numerical predictions to the values of two further coefficients,
as well.
The strong coupling behaviour of the coefficients $c_{a,n}$ in the power
series representation of the ${\bf P}_{\!a}$-functions is also investigated.
Based on our numerical data, in the regime, where the index of the coefficients
is much smaller than $\lambda^{1/4}$, we conjecture that the coefficients have
polynomial index dependence at strong coupling. This allows one to propose a
strong coupling series representation for the ${\bf P}$-functions being valid
far enough from the real short cut. In the paper the qualitative strong
coupling behaviour of the ${\bf P}$-functions at the branch points is also
discussed.Comment: 72 pages, 9 figures, 5 ancillary file
|
Strong coupling results from the numerical solution of the quantum
spectral curve
|
strong coupling results from the numerical solution of the quantum spectral curve
|
solved numerically twist trace correspondence. implement language. confirm anomalous twist operators. konishi precision well. investigated. lambda conjecture coupling. propose valid cut. qualitative branch pages ancillary file
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42740369
|
10.1007/JHEP08(2016)062
|
We present a geometric approach to D-brane model building on the
non-factorisable torus backgrounds of $T^6/\mathbb{Z}_4$, which are $A_3 \times
A_3$ and $A_3 \times A_1 \times B_2$. Based on the counting of `short'
supersymmetric three-cycles per complex structure {\it vev}, the number of
physically inequivalent lattice orientations with respect to the
anti-holomorphic involution ${\cal R}$ of the Type IIA/$\Omega\cal{R}$
orientifold can be reduced to three for the $A_3 \times A_3$ lattice and four
for the $A_3 \times A_1 \times B_2$ lattice. While four independent
three-cycles on $A_3 \times A_3$ cannot accommodate phenomenologically
interesting global models with a chiral spectrum, the eight-dimensional space
of three-cycles on $A_3 \times A_1 \times B_2$ is rich enough to provide for
particle physics models, with several globally consistent two- and
four-generation Pati-Salam models presented here.
We further show that for fractional {\it sLag} three-cycles, the compact
geometry can be rewritten in a $(T^2)^3$ factorised form, paving the way for a
generalisation of known CFT methods to determine the vector-like spectrum and
to derive the low-energy effective action for open string states.Comment: 50+Appendix, 10 figures; v2: references adde
|
Towards Geometric D6-Brane Model Building on non-Factorisable Toroidal
$\mathbb{Z}_4$-Orbifolds
|
towards geometric d6-brane model building on non-factorisable toroidal $\mathbb{z}_4$-orbifolds
|
geometric brane factorisable torus backgrounds mathbb counting supersymmetric cycles physically inequivalent orientations holomorphic involution omega orientifold lattice. cycles accommodate phenomenologically chiral eight cycles globally pati salam here. fractional slag cycles rewritten factorised paving generalisation derive adde
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42705182
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10.1007/JHEP08(2016)064
|
We provide general formulae for the topologically twisted index of a general
three-dimensional ${\cal N}\geq 2$ gauge theory with an M-theory or massive
type IIA dual in the large $N$ limit. The index is defined as the
supersymmetric path integral of the theory on $S^2\times S^1$ in the presence
of background magnetic fluxes for the R- and global symmetries and it is
conjectured to reproduce the entropy of magnetically charged static BPS AdS$_4$
black holes. For a class of theories with an M-theory dual, we show that the
logarithm of the index scales indeed as $N^{3/2}$ (and $N^{5/3}$ in the massive
type IIA case). We find an intriguing relation with the (apparently unrelated)
large $N$ limit of the partition function on $S^3$. We also provide a universal
formula for extracting the index from the large $N$ partition function on $S^3$
and its derivatives and point out its analogy with the attractor mechanism for
AdS black holes.Comment: 39 pages; v2: refs added; v3: typos remove
|
Large $N$ matrix models for 3d ${\cal N}=2$ theories: twisted index,
free energy and black holes
|
large $n$ matrix models for 3d ${\cal n}=2$ theories: twisted index, free energy and black holes
|
formulae topologically twisted massive limit. supersymmetric fluxes symmetries conjectured reproduce magnetically holes. logarithm massive intriguing apparently unrelated partition universal extracting partition derivatives analogy attractor pages refs typos remove
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42645339
|
10.1007/JHEP08(2016)065
|
We consider a conformal complex singlet extension of the Standard Model with
a Higgs portal interaction. The global $U(1)$ symmetry of the complex singlet
can be either broken or unbroken and we study each scenario. In the unbroken
case, the global $U(1)$ symmetry protects the complex singlet from decaying,
leading to an ideal cold dark matter candidate with approximately 100 GeV mass
along with a significant proportion of thermal relic dark matter abundance. In
the broken case, we have developed a renormalization-scale optimization
technique to significantly narrow the parameter space and in some situations,
provide unique predictions for all the model's couplings and masses. We have
found there exists a second Higgs boson with a mass of approximately
$550\,\rm{GeV}$ that mixes with the known $125\,\rm{GeV}$ Higgs with a large
mixing angle $\sin\theta\approx 0.47$ consistent with current experimental
limits. The imaginary part of the complex singlet in the broken case could
provide axion dark matter for a wide range of models. Upon including
interactions of the complex scalar with an additional vector-like fermion, we
explore the possibility of a diphoton excess in both the unbroken and the
broken cases. In the unbroken case, the model can provide a natural explanation
for diphoton excess if extra terms are introduced providing extra contributions
to the singlet mass. In the broken case, we find a set of coupling solutions
that yield a second Higgs boson of mass $720\,\rm{GeV}$ and an $830\,\rm{GeV}$
extra vector-like fermion $F$, which is able to address the $750\,\rm{GeV}$ LHC
diphoton excess. We also provide criteria to determine the symmetry breaking
pattern in both the Higgs and hidden sectors.Comment: 12 pages and 1 figure. Published in JHE
|
Conformal Complex Singlet Extension of the Standard Model: Scenario for
Dark Matter and a Second Higgs Boson
|
conformal complex singlet extension of the standard model: scenario for dark matter and a second higgs boson
|
conformal singlet portal interaction. singlet broken unbroken scenario. unbroken protects singlet decaying ideal cold candidate proportion relic abundance. broken renormalization narrow situations couplings masses. boson mixes theta approx limits. imaginary singlet broken axion models. fermion explore diphoton excess unbroken broken cases. unbroken explanation diphoton excess extra extra singlet mass. broken boson extra fermion diphoton excess. breaking hidden pages figure.
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42692261
|
10.1007/JHEP08(2016)069
|
The infrared dynamics of $2+1$ dimensional quantum electrodynamics (QED$_3$)
with a large number $N$ of fermion flavors is governed by an interacting CFT
that can be studied in the $1/N$ expansion. We use the $1/N$ expansion to
calculate the scaling dimensions of all the lowest three scalar operators that
transform under the $SU(N)$ flavor symmetry as a Young diagram with two columns
of not necessarily equal heights and that have vanishing topological charge. In
the case of $SU(N)$ singlets, we study the mixing of $(\bar \psi_i \psi^i)(\bar
\psi_j \psi^j)$ and $F_{\mu\nu} F^{\mu\nu}$, which are the lowest dimension
parity-even singlets. Our results suggest that these operators are irrelevant
for all $N>1$.Comment: 33 pages, 13 figures, v2 minor improvements, refs adde
|
Anomalous dimensions of scalar operators in $QED_3$
|
anomalous dimensions of scalar operators in $qed_3$
|
infrared electrodynamics fermion flavors governed interacting expansion. transform flavor columns necessarily heights vanishing topological charge. singlets parity singlets. irrelevant .comment pages minor improvements refs adde
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42705985
|
10.1007/JHEP08(2016)070
|
Using the F-theory realization, we identify a subclass of 6d (1,0) SCFTs
whose compactification on a Riemann surface leads to N = 1 4d SCFTs where the
moduli space of the Riemann surface is part of the moduli space of the theory.
In particular we argue that for a special case of these theories (dual to M5
branes probing ADE singularities), we obtain 4d N = 1 theories whose space of
marginal deformations is given by the moduli space of flat ADE connections on a
Riemann surface.Comment: v2: added an exampl
|
F-Theory and N=1 SCFTs in Four Dimensions
|
f-theory and n=1 scfts in four dimensions
|
realization subclass scfts compactification riemann scfts moduli riemann moduli theory. argue branes probing singularities marginal deformations moduli connections riemann exampl
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42731176
|
10.1007/JHEP08(2016)071
|
Imposing infrared boundary conditions on the BFKL equation with running
coupling transforms the complex momentum w-plane cut present in the gluon Green
function into an infinite series of positive Regge poles. In addition, a cut on
the negative w line remains. We consider a Hermitian kernel at leading order
with running coupling and construct the gluon Green function performing the w
integration away from the real axis. We find a strong dependence of the
asymptotic intercepts and collinear behaviour on the non-perturbative choice of
the boundary conditions, in the form of an infrared phase. This is particularly
manifest in the asymmetric infrared/ultraviolet structure of the associated
diffusion in transverse momentum. We find that random walks into the infrared
region are largely reduced in this approach.Comment: 15 pages, 11 figure
|
The Effect of the Infrared Phase of the Discrete BFKL Pomeron on
Transverse Momentum Diffusion
|
the effect of the infrared phase of the discrete bfkl pomeron on transverse momentum diffusion
|
imposing infrared bfkl running transforms gluon infinite regge poles. remains. hermitian kernel running gluon performing away axis. asymptotic intercepts collinear perturbative infrared phase. manifest asymmetric infrared ultraviolet momentum. walks infrared largely pages
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42737825
|
10.1007/JHEP08(2016)075
|
In this paper we give an explicit construction of unfolded equations for
massive higher spin supermultiplets of the minimal (1,0) supersymmetry in AdS_3
space. For that purpose we use an unfolded formulation for massive bosonic and
fermionic higher spins and find supertransformations leaving appropriate set of
unfolded equations invariant. We provide two general supermultiplets (s, s+1/2)
and (s, s-1/2) with arbitrary integer s, as well as a number of lower spin
examples.Comment: 20 pages, no figures. Some comments and references added; v3: typos
correcte
|
Unfolded equations for massive higher spin supermultiplets in AdS_3
|
unfolded equations for massive higher spin supermultiplets in ads_3
|
unfolded massive supermultiplets supersymmetry space. unfolded formulation massive bosonic fermionic spins supertransformations leaving unfolded invariant. supermultiplets integer pages figures. comments typos correcte
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42669948
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10.1007/JHEP08(2016)076
|
We review the mathematical tools required to cull and filter representations
of the Coxeter Group $BC_4$ into providing bases for the construction of
minimal off-shell representations of the 4D, $ {\cal N}$ = 1 spacetime
supersymmetry algebra. Of necessity this includes a description of the
mathematical mechanism by which four dimensional Lorentz symmetry appears as an
emergent symmetry in the context of one dimensional adinkras with four colors
described by the Coxeter Group $BC_4$.Comment: LaTeX twice, 1 figure, 11 ppg, (update includes comment on number of
acceptable four-color adinkras
|
A Proposal On Culling & Filtering A Coxeter Group For 4D, N = 1
Spacetime SUSY Representations
|
a proposal on culling & filtering a coxeter group for 4d, n = 1 spacetime susy representations
|
mathematical cull filter representations coxeter bases representations spacetime supersymmetry algebra. necessity mathematical lorentz emergent adinkras colors coxeter .comment latex twice update comment acceptable adinkras
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42702689
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10.1007/JHEP08(2016)077
|
In this paper we analyze three quantum operations in two dimensional
conformal field theories (CFTs): local projection measurements, creations of
partial entanglement between two CFTs, and swapping of subsystems between two
CFTs. We also give their holographic duals and study time evolutions of
entanglement entropy. By combining these operations, we present an analogue of
quantum teleportation between two CFTs and give its holographic realization. We
introduce a new quantity to probe tripartite entanglement by using local
projection measurement.Comment: 61 pages, 24 figures. v2: comments and refs added. v3: minor
correction
|
EPR Pairs, Local Projections and Quantum Teleportation in Holography
|
epr pairs, local projections and quantum teleportation in holography
|
analyze operations conformal cfts projection creations entanglement cfts swapping subsystems cfts. holographic duals evolutions entanglement entropy. combining operations analogue teleportation cfts holographic realization. quantity tripartite entanglement projection pages figures. comments refs added. minor
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42730016
|
10.1007/JHEP08(2016)079
|
We consider the contribution of sterile neutrinos to the electric dipole
moment of charged leptons in the most minimal realisation of the Inverse Seesaw
mechanism, in which the Standard Model is extended by two right-handed
neutrinos and two sterile fermion states. Our study shows that the two pairs of
(heavy) pseudo-Dirac mass eigenstates can give significant contributions to the
electron electric dipole moment, lying close to future experimental sensitivity
if their masses are above the electroweak scale. The major contribution comes
from two-loop diagrams with pseudo-Dirac neutrino states running in the loops.
In our analysis we further discuss the possibility of having a successful
leptogenesis in this framework, compatible with a large electron electric
dipole moment.Comment: 19 pages, 4 figures, minor changes, one appendix added, version
accepted in JHE
|
Electron electric dipole moment in Inverse Seesaw models
|
electron electric dipole moment in inverse seesaw models
|
sterile neutrinos dipole moment leptons realisation seesaw handed neutrinos sterile fermion states. pseudo dirac eigenstates dipole moment lying electroweak scale. comes diagrams pseudo dirac running loops. successful leptogenesis compatible dipole pages minor
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25015406
|
10.1007/JHEP08(2016)080
|
We study gravity duals to a broad class of N=2 supersymmetric gauge theories
defined on a general class of three-manifold geometries. The gravity
backgrounds are based on Euclidean self-dual solutions to four-dimensional
gauged supergravity. As well as constructing new examples, we prove in general
that for solutions defined on the four-ball the gravitational free energy
depends only on the supersymmetric Killing vector, finding a simple closed
formula when the solution has U(1) x U(1) symmetry. Our result agrees with the
large N limit of the free energy of the dual gauge theory, computed using
localization. This constitutes an exact check of the gauge/gravity
correspondence for a very broad class of gauge theories with a large N limit,
defined on a general class of background three-manifold geometries.Comment: 74 pages, 2 figures; v2: minor change
|
Gravity duals of supersymmetric gauge theories on three-manifolds
|
gravity duals of supersymmetric gauge theories on three-manifolds
|
duals broad supersymmetric manifold geometries. backgrounds euclidean gauged supergravity. constructing ball gravitational supersymmetric killing symmetry. agrees localization. constitutes check correspondence broad manifold pages minor
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non_dup
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[] |
42673891
|
10.1007/JHEP08(2016)081
|
We first propose and study a quantum toy model of black hole dynamics. The
model is unitary, displays quantum thermalization, and the Hamiltonian couples
every oscillator with every other, a feature intended to emulate the color
sector physics of large-$\mathcal{N}$ matrix models. Considering out of
equilibrium initial states, we analytically compute the time evolution of every
correlator of the theory and of the entanglement entropies, allowing a proper
discussion of global thermalization/scrambling of information through the
entire system. Microscopic non-locality causes factorization of reduced density
matrices, and entanglement just depends on the time evolution of occupation
densities. In the second part of the article, we show how the gained intuition
extends to large-$\mathcal{N}$ matrix models, where we provide a gauge
invariant entanglement entropy for `generalized free fields', again depending
solely on the quasinormal frequencies. The results challenge the fast
scrambling conjecture and point to a natural scenario for the emergence of the
so-called brick wall or stretched horizon. Finally, peculiarities of these
models in regards to the thermodynamic limit and the information paradox are
highlighted.Comment: Journal versio
|
Black holes as random particles: entanglement dynamics in infinite range
and matrix models
|
black holes as random particles: entanglement dynamics in infinite range and matrix models
|
propose dynamics. unitary displays thermalization couples oscillator intended emulate mathcal models. analytically correlator entanglement entropies allowing proper thermalization scrambling system. microscopic locality factorization entanglement occupation densities. gained intuition extends mathcal entanglement solely quasinormal frequencies. challenge scrambling conjecture emergence brick stretched horizon. peculiarities regards thermodynamic paradox versio
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non_dup
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[] |
42740713
|
10.1007/JHEP08(2016)082
|
We make a complete one loop calculation of the $tbW$ couplings in the Two
Higgs Doublet Model. We evaluate both the anomalous couplings $g_L$ and $g_R$
as well as left handed and right handed component of $tbW$. The computation is
done in the Feynman gauge using the on-shell scheme renormalization for the
Standard Model wave functions and parameters. We first show that the relative
corrections to these anomalous couplings are rather small in most regions of
the parameter space. We then analyze the effects of these anomalous couplings
on certain observables such as top quark polarization in single top production
through $t-$channel as well as $W^\pm$ boson helicity fractions in top decay.Comment: 30 pages, 7 figures and 6 table
|
$tbW$ Anomalous Couplings in the Two Higgs Doublet Model
|
$tbw$ anomalous couplings in the two higgs doublet model
|
couplings doublet model. anomalous couplings handed handed feynman renormalization parameters. anomalous couplings space. analyze anomalous couplings observables boson helicity fractions pages
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non_dup
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[] |
42738636
|
10.1007/JHEP08(2016)083
|
The high-energy evolution of Wilson line operators, which at leading order is
described by the Balitsky-JIMWLK equations, receives large radiative
corrections enhanced by single and double collinear logarithms at
next-to-leading order and beyond. We propose a method for resumming such
logarithmic corrections to all orders, at the level of the Langevin formulation
of the JIMWLK equation. The ensuing, collinearly-improved Langevin equation
features generalized Wilson line operators, which depend not only upon rapidity
(the logarithm of the longitudinal momentum), but also upon the transverse size
of the color neutral projectile to which the Wilson lines belong. This
additional scale dependence is built up during the evolution, via the condition
that the successive emissions of soft gluons be ordered in time. The presence
of this transverse scale in the Langevin equation furthermore allows for the
resummation of the one-loop running coupling corrections.Comment: 24 pages, 1 figur
|
Collinearly improved JIMWLK evolution in Langevin form
|
collinearly improved jimwlk evolution in langevin form
|
wilson balitsky jimwlk receives radiative collinear logarithms beyond. propose resumming logarithmic orders langevin formulation jimwlk equation. ensuing collinearly langevin wilson rapidity logarithm longitudinal neutral projectile wilson belong. built successive gluons ordered time. langevin resummation running pages figur
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non_dup
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[] |
42731070
|
10.1007/JHEP08(2016)084
|
For general N=5 and N=6 superconformal field theories in three dimensions, we
compute the three-point correlation functions of the supercurrent multiplets.
In each case, N=5 and N=6, the functional form of this correlator is uniquely
fixed modulo an overall coefficient which is related, by superconformal Ward
identities, to the parameter in the two-point function of the supercurrent. The
structure of the correlation functions obtained is consistent with the property
that every N=5 superconformal field theory, considered as a special N=4 theory,
is invariant under the mirror map.Comment: 25 page
|
Implications of N=5, 6 superconformal symmetry in three spacetime
dimensions
|
implications of n=5, 6 superconformal symmetry in three spacetime dimensions
|
superconformal supercurrent multiplets. correlator uniquely modulo superconformal ward identities supercurrent. superconformal mirror
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non_dup
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[] |
42740682
|
10.1007/JHEP08(2016)085
|
The Dirac Hamiltonian formalism is applied to a system in $(2+1)$-dimensions
consisting of a Dirac field $\psi$ minimally coupled to Chern-Simons $U(1)$ and
$SO(2,1)$ connections, $A$ and $\omega$, respectively. This theory is connected
to a supersymmetric Chern-Simons form in which the gravitino has been projected
out (unconventional supersymmetry) and, in the case of a flat background,
corresponds to the low energy limit of graphene. The separation between
first-class and second-class constraints is performed explicitly, and both the
field equations and gauge symmetries of the Lagrangian formalism are fully
recovered. The degrees of freedom of the theory in generic sectors shows that
the propagating states correspond to fermionic modes in the background
determined by the geometry of the graphene sheet and the nondynamical
electromagnetic field. This is shown for the following canonical sectors: i) a
conformally invariant generic description where the spinor field and the
dreibein are locally rescaled; ii) a specific configuration for the Dirac
fermion consistent with its spin, where Weyl symmetry is exchanged by time
reparametrizations; iii) the vacuum sector $\psi=0$, which is of interest for
perturbation theory. For the latter the analysis is adapted to the case of
manifolds with boundary, and the corresponding Dirac brackets together with the
centrally extended charge algebra are found. Finally, the $SU(2)$
generalization of the gauge group is briefly treated, yielding analogous
conclusions for the degrees of freedom.Comment: 17 pages. Accepted version for publication in JHE
|
Dynamical Contents of Unconventional Supersymmetry
|
dynamical contents of unconventional supersymmetry
|
dirac formalism consisting dirac minimally chern simons connections omega respectively. supersymmetric chern simons gravitino projected unconventional supersymmetry graphene. explicitly symmetries lagrangian formalism recovered. freedom generic sectors propagating fermionic graphene sheet nondynamical electromagnetic field. canonical sectors conformally generic spinor dreibein locally rescaled dirac fermion weyl exchanged reparametrizations perturbation theory. adapted manifolds dirac brackets centrally found. generalization briefly yielding analogous pages. publication
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non_dup
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[] |
42671861
|
10.1007/JHEP08(2016)087
|
We introduce a new perspective and a generalization of spectral networks for
4d $\mathcal{N}=2$ theories of class $\mathcal{S}$ associated to Lie algebras
$\mathfrak{g} = \textrm{A}_n$, $\textrm{D}_n$, $\textrm{E}_{6}$, and
$\textrm{E}_{7}$. Spectral networks directly compute the BPS spectra of 2d
theories on surface defects coupled to the 4d theories. A Lie algebraic
interpretation of these spectra emerges naturally from our construction,
leading to a new description of 2d-4d wall-crossing phenomena. Our construction
also provides an efficient framework for the study of BPS spectra of the 4d
theories. In addition, we consider novel types of surface defects associated
with minuscule representations of $\mathfrak{g}$.Comment: 68 pages plus appendices; visit
http://het-math2.physics.rutgers.edu/loom/ to use 'loom,' a program that
generates spectral networks; v2: version published in JHEP plus minor
correction
|
ADE Spectral Networks
|
ade spectral networks
|
perspective generalization mathcal mathcal algebras mathfrak textrm textrm textrm textrm defects theories. algebraic emerges naturally crossing phenomena. theories. defects minuscule representations mathfrak .comment pages appendices visit loom generates jhep minor
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non_dup
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[] |
42699578
|
10.1007/JHEP08(2016)088
|
The AdS/CFT correspondence relates Wilson loops in N=4 SYM to minimal area
surfaces in $AdS_5\times S^5$ space. Recently, a new approach to study minimal
area surfaces in $AdS_3 \subset AdS_5$ was discussed based on a Schroedinger
equation with a periodic potential determined by the Schwarzian derivative of
the shape of the Wilson loop. Here we use the Mathieu equation, a standard
example of a periodic potential, to obtain a class of Wilson loops such that
the area of the dual minimal area surface can be computed analytically in terms
of eigenvalues of such equation. As opposed to previous examples, these minimal
surfaces have an umbilical point (where the principal curvatures are equal) and
are invariant under $\lambda$-deformations. In various limits they reduce to
the single and multiple wound circular Wilson loop and to the regular
light-like polygons studied by Alday and Maldacena. In this last limit, the
periodic potential becomes a series of deep wells each related to a light-like
segment. Small corrections are described by a tight--binding approximation. In
the circular limit they are well approximated by an expansion developed by
A.Dekel. In the particular case of no umbilical points they reduce to a
previous solution proposed by J. Toledo. The construction works both in
Euclidean and Minkowski signature of $AdS_3$.Comment: 32 pages, 3 figure, LaTeX. Version2: References adde
|
Minimal area surfaces dual to Wilson loops and the Mathieu equation
|
minimal area surfaces dual to wilson loops and the mathieu equation
|
correspondence relates wilson loops space. schroedinger schwarzian wilson loop. mathieu wilson loops analytically eigenvalues equation. opposed umbilical principal curvatures lambda deformations. wound circular wilson polygons alday maldacena. wells segment. tight approximation. circular approximated kel. umbilical toledo. euclidean minkowski signature .comment pages latex. adde
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non_dup
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[] |
42705685
|
10.1007/JHEP08(2016)089
|
In this paper, we calculate the topological free energy for a number of
${\mathcal N} \geq 2$ Yang-Mills-Chern-Simons-matter theories at large $N$ and
fixed Chern-Simons levels. The topological free energy is defined as the
logarithm of the partition function of the theory on $S^2 \times S^1$ with a
topological A-twist along $S^2$ and can be reduced to a matrix integral by
exploiting the localization technique. The theories of our interest are dual to
a variety of Calabi-Yau four-fold singularities, including a product of two
asymptotically locally Euclidean singularities and the cone over various
well-known homogeneous Sasaki-Einstein seven-manifolds, $N^{0,1,0}$, $V^{5,2}$,
and $Q^{1,1,1}$. We check that the large $N$ topological free energy can be
matched for theories which are related by dualities, including mirror symmetry
and $\mathrm{SL}(2,\mathbb{Z})$ duality.Comment: 34 pages, v2: refs added, improvement of section 5.1, published
version; v3: typos remove
|
Large $N$ topologically twisted index: necklace quivers, dualities, and
Sasaki-Einstein spaces
|
large $n$ topologically twisted index: necklace quivers, dualities, and sasaki-einstein spaces
|
topological mathcal mills chern simons chern simons levels. topological logarithm partition topological twist exploiting localization technique. calabi singularities asymptotically locally euclidean singularities cone homogeneous sasaki einstein seven manifolds check topological matched dualities mirror mathrm mathbb pages refs typos remove
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non_dup
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[] |
42744330
|
10.1007/JHEP08(2016)090
|
We simultaneously investigate source, detector and matter non-standard
neutrino interactions at the proposed DUNE experiment. Our analysis is
performed using a Markov Chain Monte Carlo exploring the full parameter space.
We find that the sensitivity of DUNE to the standard oscillation parameters is
worsened due to the presence of non-standard neutrino interactions. In
particular, there are degenerate solutions in the leptonic mixing angle
$\theta_{23}$ and the Dirac CP-violating phase $\delta$. We also compute the
expected sensitivities at DUNE to the non-standard interaction parameters. We
find that the sensitivities to the matter non-standard interaction parameters
are substantially stronger than the current bounds (up to a factor of about
15). Furthermore, we discuss correlations between the source/detector and
matter non-standard interaction parameters and find a degenerate solution in
$\theta_{23}$. Finally, we explore the effect of statistics on our results.Comment: 21 pages, 7 figures. Version accepted for publication in JHE
|
A combined study of source, detector and matter non-standard neutrino
interactions at DUNE
|
a combined study of source, detector and matter non-standard neutrino interactions at dune
|
simultaneously dune experiment. markov monte carlo exploring space. dune oscillation worsened interactions. degenerate leptonic theta dirac violating delta sensitivities dune parameters. sensitivities substantially stronger bounds degenerate theta explore pages figures. publication
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non_dup
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[] |
42740966
|
10.1007/JHEP08(2016)091
|
The standard theoretical framework to deal with weak decays of heavy mesons
is the so-called weak effective Hamiltonian. It involves the short-distance
Wilson coefficients, which depend on the renormalisation scale $\mu$. For
specific calculations one has to evolve the Wilson coefficients down from the
electroweak scale $\mu=M_W$ to the typical mass scale of the decay under
consideration. This is done by solving a renormalisation group equation for the
effective operator basis. In this paper the results of a consistent two-step
running of the $c \to u \,\ell^+\ell^-$ Wilson coefficients for dimension-6
operators are presented. This running involves the intermediate scale $\mu=m_b$
(with $M_W > m_b > m_c$) where the bottom quark is integrated out. The matching
coefficients and anomalous dimensions are taken to the required order by
generalizing and extending results from $b \to s$ or $s \to d$ transitions
available in the literature.Comment: 13 pages, 1 figur
|
Higher-order Wilson coefficients for c $\to$ u transitions in the
Standard Model
|
higher-order wilson coefficients for c $\to$ u transitions in the standard model
|
deal decays mesons hamiltonian. involves wilson renormalisation evolve wilson electroweak consideration. solving renormalisation basis. running wilson presented. running involves out. matching anomalous generalizing extending pages figur
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non_dup
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[] |
42736296
|
10.1007/JHEP08(2016)092
|
We show that already at the NLO level the DGLAP evolution kernel Pqq starts
to depend on the choice of the evolution variable. We give an explicit example
of such a variable, namely the maximum of transverse momenta of emitted partons
and we identify a class of evolution variables that leave the NLO Pqq kernel
unchanged with respect to the known standard MS-bar results. The kernels are
calculated using a modified Curci-Furmanski-Petronzio method which is based on
a direct Feynman-graphs calculation.Comment: 16 pages, 4 figure
|
On the dependence of QCD splitting functions on the choice of the
evolution variable
|
on the dependence of qcd splitting functions on the choice of the evolution variable
|
dglap kernel starts variable. momenta emitted partons leave kernel unchanged results. kernels curci furmanski petronzio feynman pages
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non_dup
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[] |
42699272
|
10.1007/JHEP08(2016)093
|
One of the open problems in understanding (0,2) mirror symmetry concerns the
construction of Toda-like Landau-Ginzburg mirrors to (0,2) theories on Fano
spaces. In this paper, we begin to fill this gap by making an ansatz for (0,2)
Toda-like theories mirror to (0,2) supersymmetric nonlinear sigma models on
products of projective spaces, with deformations of the tangent bundle,
generalizing a special case previously worked out for P1xP1. We check this
ansatz by matching correlation functions of the B/2-twisted Toda-like theories
to correlation functions of corresponding A/2-twisted nonlinear sigma models,
computed primarily using localization techniques. These (0,2) Landau-Ginzburg
models admit redundancies, which can lend themselves to multiple
distinct-looking representatives of the same physics, which we discuss.Comment: 35 pages, LaTeX; v2: typos fixed; v3: more typos fixe
|
Toda-like (0,2) mirrors to products of projective spaces
|
toda-like (0,2) mirrors to products of projective spaces
|
mirror concerns toda landau ginzburg mirrors fano spaces. begin fill ansatz toda mirror supersymmetric sigma projective deformations tangent bundle generalizing worked check ansatz matching twisted toda twisted sigma primarily localization techniques. landau ginzburg admit redundancies lend looking representatives pages latex typos typos fixe
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non_dup
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[] |
42738332
|
10.1007/JHEP08(2016)094
|
In this paper, we revisit a scale-invariant extension of the standard model
(SM) with a strongly interacting hidden sector within AdS/QCD approach. Using
the AdS/QCD, we reduce the number of input parameters to three, {\it i.e.}
hidden pion decay constant, hidden pion mass and $\tan\beta$ that is defined as
the ratio of the vacuum expectation values (VEV) of the singlet scalar field
and the SM Higgs boson. As a result, our model has sharp predictability. We
perform the phenomenological analysis of the hidden pions which is one of the
dark matter (DM) candidates in this model. With various theoretical and
experimental constraints we search for the allowed parameter space and find
that both resonance and non-resonance solutions are possible. Some typical
correlations among various observables such as thermal relic density of hidden
pions, Higgs boson signal strengths and DM-nucleon cross section are
investigated. We provide some benchmark points for experimental tests.Comment: minor corrections, version appeared in JHE
|
AdS/QCD approach to the scale-invariant extension of the standard model
with a strongly interacting hidden sector
|
ads/qcd approach to the scale-invariant extension of the standard model with a strongly interacting hidden sector
|
revisit interacting hidden approach. i.e. hidden pion hidden pion beta expectation singlet boson. sharp predictability. phenomenological hidden pions candidates model. possible. observables relic hidden pions boson strengths nucleon investigated. benchmark minor appeared
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non_dup
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[] |
42738974
|
10.1007/JHEP08(2016)096
|
We consider a RG flow in a general su(2) coset model induced by the least
relevant field. This is done using two different approaches. We first compute
the mixing coefficients of certain fields in the UV and IR theories using a
conformal perturbation theory. The necessary structure constants are computed.
The same coefficients can be calculated using the RG domain wall construction
of Gaiotto. We compute the corresponding one-point functions and show that the
two approaches give the same result in the leading order.Comment: 19 pages, references added. arXiv admin note: text overlap with
arXiv:1606.0432
|
RG Domain Wall for the General su(2) Coset Models
|
rg domain wall for the general su(2) coset models
|
coset field. approaches. conformal perturbation theory. computed. gaiotto. pages added. admin overlap
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non_dup
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[] |
42674839
|
10.1007/JHEP08(2016)097
|
We develop the representation of infalling observers and bulk fields in the
CFT as a way to understand the black hole interior in AdS. We first discuss
properties of CFT states which are dual to black holes. We then show that in
the presence of a Killing horizon bulk fields can be decomposed into pieces we
call ingoing and outgoing. The ingoing field admits a simple operator
representation in the CFT, even inside a small black hole at late times, which
leads to a simple CFT description of infalling geodesics. This means classical
infalling observers will experience the classical geometry in the interior. The
outgoing piece of the field is more subtle. In an eternal two-sided geometry it
can be represented as an operator on the left CFT. In a stable one-sided
geometry it can be described using entanglement via the PR construction. But in
an evaporating black hole trans-horizon entanglement breaks down at the Page
time, which means that for old black holes the PR construction fails and the
outgoing field does not see local geometry. This picture of the interior allows
the CFT to reconcile unitary Hawking evaporation with the classical experience
of infalling observers.Comment: 48 pages, LaTeX, 8 figures. v2: minor edits, additional reference.
v3: version to appear in JHE
|
Asymmetric interiors for small black holes
|
asymmetric interiors for small black holes
|
infalling observers interior ads. holes. killing horizon decomposed pieces call ingoing outgoing. ingoing admits infalling geodesics. infalling observers interior. outgoing piece subtle. eternal sided cft. sided entanglement construction. evaporating horizon entanglement breaks holes fails outgoing geometry. picture interior reconcile unitary hawking evaporation infalling pages latex figures. minor edits reference.
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non_dup
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[] |
29520484
|
10.1007/JHEP08(2016)098
|
We present $B_q\to\rho$, $B_q\to\omega$, $B_q\to K^*$, $B_s\to K^*$ and
$B_s\to \phi$ form factors from light-cone sum rules (LCSR) at
$\mathcal{O}(\alpha_s)$ for twist-2 and 3 and $\mathcal{O}(\alpha_s^0)$ for
twist-4 with updated hadronic input parameters. Three asymptotic light-cone
distribution amplitudes of twist-$4$ (and $5$) are determined, necessary for
the form factors to obey the equations of motion. It is argued that the latter
constrain the uncertainty of tensor-to-vector form factor ratios thereby
improving the prediction of zeros of helicity amplitudes of major importance
for $B\to K^*\ell\ell$ angular observables. We provide easy-to-use fits to the
LCSR results, including the full error correlation matrix, in all modes at low
$q^2$ as well as combined fits to LCSR and lattice results covering the entire
kinematic range for $B_q\to K^*$, $B_s\to K^*$ and $B_s\to \phi$. The error
correlation matrix avoids the problem of overestimating the uncertainty in
phenomenological applications. Using the new form factors and recent
computations of non-factorisable contributions we provide Standard Model
predictions for $B\to K^*\gamma$ as well as $B\to K^*\ell^+\ell^-$ and
$B_s\to\phi\mu^+\mu^-$ at low dilepton invariant mass. Employing our $B \to
(\rho,\omega) $ form factor results we extract the CKM element
$|V_\mathrm{ub}|$ from the semileptonic decays $B\to(\rho,\omega) \ell\nu$ and
find good agreement with other exclusive determinations.Comment: 64 pages, 7 figures, 15 tables. v3: Minor clarifications, numerics
unchanged. Matches version published in JHE
|
$B\to V\ell^+\ell^-$ in the Standard Model from Light-Cone Sum Rules
|
$b\to v\ell^+\ell^-$ in the standard model from light-cone sum rules
|
omega cone lcsr mathcal alpha twist mathcal alpha twist updated hadronic parameters. asymptotic cone amplitudes twist obey motion. argued constrain thereby improving zeros helicity amplitudes observables. fits lcsr fits lcsr covering kinematic avoids overestimating phenomenological applications. computations factorisable gamma dilepton mass. employing omega extract mathrm semileptonic decays omega exclusive pages tables. minor clarifications numerics unchanged. matches
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non_dup
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[] |
42681368
|
10.1007/JHEP08(2016)100
|
The relaxion mechanism is a novel solution to the hierarchy problem. In this
first statistical analysis of the relaxion mechanism, we quantify the relative
plausibility of a QCD and a non-QCD relaxion model versus the Standard Model
with Bayesian statistics, which includes an automatic penalty for fine-tuning.
We find that in light of the hierarchy between the weak and Planck scales,
relaxion models are favoured by colossal Bayes-factors. Constraints upon \eg
the vacuum energy during relaxation, however, shrink the Bayes-factors such
that relaxion models are only slightly favoured. Including the bounds on
$\left|\theta_\text{QCD}\right|$ shatters the plausibility of the QCD relaxion
model as it typically yields $\left|\theta_\text{QCD}\right| \gg 0$. Finally,
we augment our models with scalar-field inflation and consider measurements of
inflationary observables from BICEP/Planck. We find that, all told, the
Standard Model is favoured by huge Bayes-factors as the relaxion models require
fine-tuning such that the Hubble parameter is less than the height of the
periodic barriers. Thus, whilst we confirm that relaxion models could solve the
hierarchy problem, we find that their unconventional cosmology demolishes their
plausibility
|
Naturalness of the relaxion mechanism
|
naturalness of the relaxion mechanism
|
relaxion hierarchy problem. relaxion quantify plausibility relaxion bayesian automatic penalty fine tuning. hierarchy planck relaxion favoured colossal bayes factors. relaxation shrink bayes relaxion favoured. bounds theta shatters plausibility relaxion theta augment inflation inflationary observables bicep planck. told favoured huge bayes relaxion fine tuning hubble barriers. whilst confirm relaxion solve hierarchy unconventional cosmology demolishes plausibility
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non_dup
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[] |
42722610
|
10.1007/JHEP08(2016)101
|
The $S$-matrix of a quantum field theory is unchanged by field redefinitions,
and so only depends on geometric quantities such as the curvature of field
space. Whether the Higgs multiplet transforms linearly or non-linearly under
electroweak symmetry is a subtle question since one can make a coordinate
change to convert a field that transforms linearly into one that transforms
non-linearly. Renormalizability of the Standard Model (SM) does not depend on
the choice of scalar fields or whether the scalar fields transform linearly or
non-linearly under the gauge group, but only on the geometric requirement that
the scalar field manifold ${\mathcal M}$ is flat. We explicitly compute the
one-loop correction to scalar scattering in the SM written in non-linear
Callan-Coleman-Wess-Zumino (CCWZ) form, where it has an infinite series of
higher dimensional operators, and show that the $S$-matrix is finite. Standard
Model Effective Field Theory (SMEFT) and Higgs Effective Field Theory (HEFT)
have curved ${\mathcal M}$, since they parametrize deviations from the flat SM
case. We show that the HEFT Lagrangian can be written in SMEFT form if and only
if ${\cal M}$ has a $SU(2)_L \times U(1)_Y$ invariant fixed point. Experimental
observables in HEFT depend on local geometric invariants of ${\mathcal M}$ such
as sectional curvatures, which are of order $1/\Lambda^2$, where $\Lambda$ is
the EFT scale. We give explicit expressions for these quantities in terms of
the structure constants for a general $\mathcal G \to \mathcal H$ symmetry
breaking pattern. (Full abstract in pdf
|
Geometry of the Scalar Sector
|
geometry of the scalar sector
|
unchanged redefinitions geometric quantities curvature space. multiplet transforms linearly linearly electroweak subtle coordinate convert transforms linearly transforms linearly. renormalizability transform linearly linearly geometric requirement manifold mathcal flat. explicitly callan coleman wess zumino ccwz infinite finite. smeft heft curved mathcal parametrize deviations case. heft lagrangian smeft point. observables heft geometric invariants mathcal sectional curvatures lambda lambda scale. expressions quantities mathcal mathcal breaking pattern.
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non_dup
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[] |
42696242
|
10.1007/JHEP08(2016)105
|
We consider the inclusive production of a Higgs boson in gluon-fusion and we
study the impact of threshold resummation at next-to-next-to-next-to-leading
logarithmic accuracy (N$^3$LL) on the recently computed fixed-order prediction
at next-to-next-to-next-to-leading order (N$^3$LO). We propose a conservative,
yet robust way of estimating the perturbative uncertainty from missing higher
(fixed- or logarithmic-) orders. We compare our results with two other
different methods of estimating the uncertainty from missing higher orders: the
Cacciari-Houdeau Bayesian approach to theory errors, and the use of algorithms
to accelerate the convergence of the perturbative series. We confirm that the
best convergence happens at $\mu_R=\mu_F=m_H\,/\,2$, and we conclude that a
reliable estimate of the uncertainty from missing higher orders on the Higgs
cross section at 13 TeV is approximately $\pm4$%.Comment: 27 pages, 6 figures. Version to be published in JHE
|
On the Higgs cross section at N$^3$LO+N$^3$LL and its uncertainty
|
on the higgs cross section at n$^3$lo+n$^3$ll and its uncertainty
|
inclusive boson gluon fusion resummation logarithmic propose conservative robust estimating perturbative missing logarithmic orders. estimating missing orders cacciari houdeau bayesian accelerate perturbative series. confirm happens reliable missing orders .comment pages figures.
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non_dup
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[] |
42727728
|
10.1007/JHEP08(2016)107
|
We investigate compactifications of type II and M-theory down to $AdS_5$ with
generic fluxes that preserve eight supercharges, in the framework of
Exceptional Generalized Geometry. The geometric data and gauge fields on the
internal manifold are encoded in a pair of generalized structures corresponding
to the vector and hyper-multiplets of the reduced five-dimensional
supergravity. Supersymmetry translates into integrability conditions for these
structures, generalizing, in the case of type IIB, the Sasaki-Einstein
conditions. We show that the ten and eleven-dimensional type IIB and M-theory
Killing-spinor equations specialized to a warped $AdS_5$ background imply the
generalized integrability conditions.Comment: 38 page
|
Generalized geometric vacua with eight supercharges
|
generalized geometric vacua with eight supercharges
|
compactifications generic fluxes preserve eight supercharges exceptional geometry. geometric manifold encoded hyper multiplets supergravity. supersymmetry translates integrability generalizing sasaki einstein conditions. eleven killing spinor specialized warped imply integrability
|
non_dup
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[] |
42669139
|
10.1007/JHEP08(2016)108
|
In this work, we calculate the branching ratios for the
$\eta(\eta')\rightarrow\bar{\ell}\ell$ decays, where $\ell = e,\mu$. These
processes have tiny rates in the standard model due to spin flip, loop, and
electromagnetic suppression, for what they could be sensitive to New Physics
effects. In order to provide a reliable input for the Standard Model, we
exploit the general analytical properties of the amplitude. For that purpose,
we invoke the machinery of Canterbury approximants, which provides a systematic
description of the underlying hadronic physics in a data-driven fashion. Given
the current experimental discrepancies, we discuss in detail the role of the
resonant region and comment on the reliability of $\chi$PT calculations.
Finally, we discuss the kind of new physics which we think would be relevant to
account for them.Comment: 35 pages, 18 figures. V2 matches the published versio
|
$\eta$ and $\eta'$ decays into lepton pairs
|
$\eta$ and $\eta'$ decays into lepton pairs
|
branching rightarrow decays tiny flip electromagnetic suppression effects. reliable exploit amplitude. invoke machinery canterbury approximants hadronic fashion. discrepancies resonant comment reliability calculations. kind think pages figures. matches versio
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non_dup
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42691416
|
10.1007/JHEP08(2016)109
|
Higgs portal dark matter (DM) models are simple interesting and viable DM
models. There are three types of the models depending on the DM spin: scalar,
fermion and vector DM models. In this paper, we consider renormalizable,
unitary and gauge invariant Higgs portal DM models, and study how large
parameter regions can be surveyed at the International Linear Collider (ILC)
experiment at $\sqrt{s}=500$ GeV. For the Higgs portal singlet fermion and
vector DM cases, the force mediator involves two scalar propagators, the
SM-like Higgs boson and the dark Higgs boson. We show that their interference
generates interesting and important patterns in the mono-$Z$ plus missing $E_T$
signatures at the ILC, and the results are completely different from those
obtained from the Higgs portal DM models within the effective field theories.
In addition, we show that it would be possible to distinguish the spin of DM in
the Higgs portal scenarios, if the shape of the recoil-mass distribution is
observed. We emphasize that the interplay between these collider observations
and those in the direct detection experiments has to be performed in the model
with renomalizability and unitarity to combine the model analyses in different
scales.Comment: 25 pages, 15 figures; minor changes, references added; discussions
added, numbers in Table 1 correcte
|
Search for Higgs portal DM at the ILC
|
search for higgs portal dm at the ilc
|
portal viable models. fermion models. renormalizable unitary portal surveyed collider sqrt gev. portal singlet fermion mediator involves propagators boson boson. interference generates mono missing signatures portal theories. distinguish portal scenarios recoil observed. emphasize interplay collider renomalizability unitarity combine pages minor discussions correcte
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42727576
|
10.1007/JHEP08(2016)110
|
We study moduli stabilization for type IIB orientifolds compactified on
Calabi-Yau threefolds in the region close to conifold singularities in the
complex structure moduli space. The form of the periods implies new phenomena
like exponential mass hierarchies even in the regime of negligible warping.
Integrating out the heavy conic complex structure modulus leads to an effective
flux induced potential for the axio-dilaton and the remaining complex structure
moduli containing exponentially suppressed terms that imitate non-perturbative
effects. It is shown that this scenario can be naturally combined with the
large volume scenario so that all moduli are dynamically stabilized in the
dilute flux regime. As an application of this moduli stabilization scheme, a
string inspired model of aligned inflation is designed that features a
parametrically controlled hierarchy of mass scales.Comment: 33 pages, 4 figures, v2: final versio
|
String Moduli Stabilization at the Conifold
|
string moduli stabilization at the conifold
|
moduli stabilization orientifolds compactified calabi threefolds conifold singularities moduli space. phenomena exponential hierarchies negligible warping. integrating conic modulus axio dilaton moduli exponentially suppressed imitate perturbative effects. naturally moduli dynamically stabilized dilute regime. moduli stabilization inspired aligned inflation parametrically hierarchy pages versio
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42725043
|
10.1007/JHEP08(2016)111
|
We study direct detection in simplified models of Dark Matter (DM) in which
interactions with Standard Model (SM) fermions are mediated by a heavy vector
boson. We consider fully general, gauge-invariant couplings between the SM, the
mediator and both scalar and fermion DM. We account for the evolution of the
couplings between the energy scale of the mediator mass and the nuclear energy
scale. This running arises from virtual effects of SM particles and its
inclusion is not optional. We compare bounds on the mediator mass from direct
detection experiments with and without accounting for the running. In some
cases the inclusion of these effects changes the bounds by several orders of
magnitude, as a consequence of operator mixing which generates new interactions
at low energy. We also highlight the importance of these effects when
translating LHC limits on the mediator mass into bounds on the direct detection
cross section. For an axial-vector mediator, the running can alter the derived
bounds on the spin-dependent DM-nucleon cross section by a factor of two or
more. Finally, we provide tools to facilitate the inclusion of these effects in
future studies: general approximate expressions for the low energy couplings
and a public code runDM to evolve the couplings between arbitrary energy
scales.Comment: 26 pages + appendices, 9 + 2 figures. The runDM code is available at
https://github.com/bradkav/runDM/. v2: references added, version published in
JHE
|
You can hide but you have to run: direct detection with vector mediators
|
you can hide but you have to run: direct detection with vector mediators
|
simplified fermions boson. couplings mediator fermion couplings mediator scale. running arises virtual inclusion optional. bounds mediator accounting running. inclusion bounds orders generates energy. highlight translating mediator bounds section. axial mediator running alter bounds nucleon more. facilitate inclusion approximate expressions couplings rundm evolve couplings pages appendices figures. rundm
|
non_dup
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[] |
29556212
|
10.1007/JHEP08(2016)112
|
Some of the most arduous and error-prone aspects of precision resummed
calculations are related to the partonic hard process, having nothing to do
with the resummation. In particular, interfacing to parton-distribution
functions, combining various channels, and performing the phase space
integration can be limiting factors in completing calculations. Conveniently,
however, most of these tasks are already automated in many Monte Carlo
programs, such as MadGraph, Alpgen or Sherpa. In this paper, we show how such
programs can be used to produce distributions of partonic kinematics with
associated color structures representing the hard factor in a resummed
distribution. These distributions can then be used to weight convolutions of
jet, soft and beam functions producing a complete resummed calculation. In
fact, only around 1000 unweighted events are necessary to produce precise
distributions. A number of examples and checks are provided, including $e^+e^-$
two- and four-jet event shapes, $n$-jettiness and jet-mass related observables
at hadron colliders. Attached code can be used to modify MadGraph to export the
relevant leading-order hard functions and color structures for arbitrary
processes.Comment: 30 pages, 10 figures, code included with submissio
|
Streamlining resummed QCD calculations using Monte Carlo integration
|
streamlining resummed qcd calculations using monte carlo integration
|
arduous prone precision resummed partonic nothing resummation. interfacing parton combining performing limiting completing calculations. conveniently tasks automated monte carlo programs madgraph alpgen sherpa. programs partonic kinematics representing resummed distribution. convolutions producing resummed calculation. unweighted precise distributions. checks shapes jettiness observables hadron colliders. attached modify madgraph export pages submissio
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non_dup
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[] |
42711537
|
10.1007/JHEP08(2016)114
|
In this work, we have considered a gauged $U(1)_{\rm B-L}$ extension of the
Standard Model (SM) with three right handed neutrinos for anomaly cancellation
and two additional SM singlet complex scalars with non-trivial B-L charges. One
of these is used to spontaneously break the $U(1)_{\rm B-L}$ gauge symmetry,
leading to Majorana masses for the neutrinos through the standard Type I seesaw
mechanism, while the other becomes the dark matter (DM) candidate in the model.
We test the viability of the model to simultaneously explain the DM relic
density observed in the CMB data as well as the Galactic Centre (GC)
$\gamma$-ray excess seen by Fermi-LAT. We show that for DM masses in the range
40-55 GeV and for a wide range of $U(1)_{\rm B-L}$ gauge boson masses, one can
satisfy both these constraints if the additional neutral Higgs scalar has a
mass around the resonance region. In studying the dark matter phenomenology and
GC excess, we have taken into account theoretical as well as experimental
constraints coming from vacuum stability condition, PLANCK bound on DM relic
density, LHC and LUX and present allowed areas in the model parameter space
consistent with all relevant data, calculate the predicted gamma ray flux from
the GC and discuss the related phenomenology.Comment: 33 Pages, 11 Figures, 3 Tables, Version accepted for publication in
JHE
|
Galactic Gamma Ray Excess and Dark Matter Phenomenology in a
$U(1)_{B-L}$ Model
|
galactic gamma ray excess and dark matter phenomenology in a $u(1)_{b-l}$ model
|
gauged handed neutrinos anomaly cancellation singlet scalars trivial charges. spontaneously break majorana neutrinos seesaw candidate model. viability simultaneously relic galactic gamma excess fermi lat. boson satisfy neutral region. studying phenomenology excess coming planck relic gamma pages tables publication
|
non_dup
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[] |
42703769
|
10.1007/JHEP08(2016)115
|
Motivated by the recently improved lattice QCD results on the hadronic matrix
elements entering $\Delta M_{s,d}$ in $B_{s,d}^0-\bar B_{s,d}^0$ mixings and
the resulting increased tensions between $\Delta M_{s,d}$ and $\varepsilon_K$
in the Standard Model and CMFV models, we demonstrate that these tensions can
be removed in 331 models based on the gauge group $SU(3)_C\times SU(3)_L\times
U(1)_X$ both for $M_{Z^\prime}$ in the LHC reach and well beyond it. But the
implied new physics (NP) patterns in $\Delta F=1$ observables depend
sensitively on the value of $|V_{cb}|$. Concentrating the analysis on three 331
models that have been selected by us previously on the basis of their
performance in electroweak precision tests and $\varepsilon^\prime/\varepsilon$
we illustrate this for $|V_{cb}|=0.042$ and $|V_{cb}|=0.040$. We find that
these new lattice data still allow for positive shifts in
$\varepsilon^\prime/\varepsilon$ up to $6\times 10^{-4}$ for
$M_{Z^\prime}=3~TeV$ for both values of $$|V_{cb}|$ but for
$M_{Z^\prime}=10~TeV$ only for $|V_{cb}|=0.040$ such shifts can be obtained. NP
effects in $B_s\to\mu^+\mu^-$ and in the Wilson coefficient $C_9$ are
significantly larger in all three models for the case of $|V_{cb}|=0.040$. In
particular in two models the rate for $B_s\to\mu^+\mu^-$ can be reduced by NP
by $20\%$ for $M_{Z^\prime}=3~TeV$ resulting in values in the ballpark of
central values from CMS and LHCb. In the third model a shift in $C_9$ up to
$C_9^\text{NP}=-0.5$ is possible. We also consider the simplest 331 model,
analyzed recently in the literature, in which $X=Y$, the usual hypercharge. We
find that in this model NP effects in flavour observables are much smaller than
in the three models with $X\not=Y$, in particular NP contributions to the ratio
$\varepsilon^\prime/\varepsilon$ are very strongly suppressed.Comment: LaTeX, 24 pages, 16 figures. Discussion on $V_{ub}$ and $V_{cb}$
improved, two more figures added, conclusions unchange
|
331 Models Facing the Tensions in $\Delta F=2$ Processes with the Impact
on $\varepsilon^\prime/\varepsilon$, $B_s\to\mu^+\mu^-$ and $B\to
K^*\mu^+\mu^-$
|
331 models facing the tensions in $\delta f=2$ processes with the impact on $\varepsilon^\prime/\varepsilon$, $b_s\to\mu^+\mu^-$ and $b\to k^*\mu^+\mu^-$
|
motivated hadronic entering delta mixings tensions delta varepsilon cmfv tensions removed prime implied delta observables sensitively concentrating electroweak precision varepsilon prime varepsilon illustrate shifts varepsilon prime varepsilon prime prime shifts obtained. wilson prime ballpark lhcb. possible. simplest usual hypercharge. flavour observables varepsilon prime varepsilon latex pages figures. unchange
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42729872
|
10.1007/JHEP08(2016)116
|
We explore the momentum analyticity of the static transverse polarization
tensor of a 2+1 dimensional holographic superconductor in its normal phase with
a nonzero chemical potential, aiming at finding the holographic counterpart of
the singularities underlying the Friedel-like oscillations of an ordinary field
theory. We prove that the polarization tensor is a meromorphic function with an
infinite number of poles located on the complex momentum plane off real axis.
With the aid of the WKB approximation these poles are found to lies
asymptotically along two straight lines parallel to the imaginary axis for a
large momentum magnitude. The similarity between the holographic Green's
function and that of an weakly coupled ordinary field theory (e.g., 2+1
dimensional QED) regarding the location of the momentum singularities offers
further support to the validity of the gauge/gravity duality.Comment: 17 pages, 2 figure
|
Momentum Analyticity of Transverse Polarization Tensor in the Normal
Phase of a Holographic Superconductor
|
momentum analyticity of transverse polarization tensor in the normal phase of a holographic superconductor
|
explore analyticity holographic superconductor nonzero aiming holographic counterpart singularities friedel oscillations ordinary theory. meromorphic infinite poles axis. poles lies asymptotically straight imaginary magnitude. similarity holographic weakly ordinary e.g. singularities offers validity pages
|
non_dup
|
[] |
42662368
|
10.1007/JHEP08(2016)117
|
We study the supersymmetric Casimir energy $E_\mathrm{susy}$ of
$\mathcal{N}=1$ field theories with an R-symmetry, defined on rigid
supersymmetric backgrounds $S^1\times M_3$, using a Hamiltonian formalism.
These backgrounds admit an ambi-Hermitian geometry, and we show that the net
contributions to $E_\mathrm{susy}$ arise from certain twisted holomorphic modes
on $\mathbb{R}\times M_3$, with respect to both complex structures. The
supersymmetric Casimir energy may then be identified as a limit of an
index-character that counts these modes. In particular this explains a recent
observation relating $E_\mathrm{susy}$ on $S^1\times S^3$ to the anomaly
polynomial. As further applications we compute $E_\mathrm{susy}$ for certain
secondary Hopf surfaces, and discuss how the index-character may also be used
to compute generalized supersymmetric indices.Comment: 47 pages; v2: footnote 6 added, formula (5.29) changed, Section 6
moved to Appendix
|
The character of the supersymmetric Casimir energy
|
the character of the supersymmetric casimir energy
|
supersymmetric casimir mathrm susy mathcal rigid supersymmetric backgrounds formalism. backgrounds admit ambi hermitian mathrm susy arise twisted holomorphic mathbb structures. supersymmetric casimir character counts modes. explains relating mathrm susy anomaly polynomial. mathrm susy hopf character supersymmetric pages footnote changed moved
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42657837
|
10.1007/JHEP08(2016)118
|
We compute the leading contribution to the mutual information (MI) of two
disjoint spheres in the large distance regime for arbitrary conformal field
theories (CFT) in any dimension. This is achieved by refining the operator
product expansion method introduced by Cardy \cite{Cardy:2013nua}. For CFTs
with holographic duals the leading contribution to the MI at long distances
comes from bulk quantum corrections to the Ryu-Takayanagi area formula.
According to the FLM proposal\cite{Faulkner:2013ana} this equals the bulk MI
between the two disjoint regions spanned by the boundary spheres and their
corresponding minimal area surfaces. We compute this quantum correction and
provide in this way a non-trivial check of the FLM proposal.Comment: 16 pages, 2 figures, acknowledges added to match the submitted JHEP
versio
|
Quantum Corrections to Holographic Mutual Information
|
quantum corrections to holographic mutual information
|
mutual disjoint spheres conformal dimension. refining cardy cite cardy cfts holographic duals distances comes takayanagi formula. proposal cite faulkner equals disjoint spanned spheres surfaces. trivial check pages acknowledges match submitted jhep versio
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non_dup
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[] |
42718584
|
10.1007/JHEP08(2016)120
|
We study properties of a non equilibrium steady state generated when two heat
baths are initially in contact with one another. The dynamics of the system we
study are governed by holographic duality in a large number of dimensions. We
discuss the "phase diagram" associated with the steady state; the dual,
dynamical, black hole description of this problem; and its relation to the
fluid/gravity correspondence.Comment: 34 pages, 35 figures; v2 ref added, bug in hyperlinks fixed; v3
clarifying remarks added, version to appear in JHE
|
The holographic dual of a Riemann problem in a large number of
dimensions
|
the holographic dual of a riemann problem in a large number of dimensions
|
steady baths initially another. governed holographic duality dimensions. steady pages hyperlinks clarifying remarks
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non_dup
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[] |
29500728
|
10.1007/JHEP08(2016)121
|
Consider an arbitrary local quantum field theory with a gap or an arbitrary
gapless free theory. We consider states in such a theory, that describe two
entangled particles localized in disjoint regions of space. We show that in
such a state, to leading order, R\'{e}nyi entropies of spatial regions,
containing only one of the particles are same as their quantum mechanical
counterparts, after subtraction of vacuum contribution. Subleading corrections
depend on overlap of wave functions. These results suggest that Von Neumann
entropy of a spatial region, after subtraction of vacuum contribution, can
serve as a measure of entanglement of indistinguishable particles in pure
states.Comment: 14 pages, v5: JHEP published versio
|
Entanglement of Spatial Regions vs. Entanglement of Particles
|
entanglement of spatial regions vs. entanglement of particles
|
gapless theory. entangled localized disjoint space. entropies counterparts subtraction contribution. subleading overlap functions. neumann subtraction serve entanglement indistinguishable pages jhep versio
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non_dup
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[] |
42697229
|
10.1007/JHEP08(2016)123
|
We construct a three dimensional deconfinement method which enables us to
find new three-dimensional dualities and we apply various techniques developed
in four dimensional supersymmetric gauge theories, such as the product gauge
groups and Seiberg-Witten curves to the three dimensional $\mathcal{N}=2$
supersymmetric gauge theories. Dual descriptions of three dimensional
$\mathcal{N}=2$ supersymmetric gauge theories which involve two-index matters,
for example, adjoint, symmetric, and anti-symmetric matters without
superpotentials can be obtained. These matters are described in terms of
s-confining phases of the supersymmetric gauge theories.Comment: 46 page
|
3d Deconfinement, Product gauge group, Seiberg-Witten and New 3d
dualities
|
3d deconfinement, product gauge group, seiberg-witten and new 3d dualities
|
deconfinement enables dualities supersymmetric seiberg witten mathcal supersymmetric theories. descriptions mathcal supersymmetric involve matters adjoint matters superpotentials obtained. matters confining supersymmetric
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non_dup
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[] |
42695984
|
10.1007/JHEP08(2016)124
|
Based on the gauge/gravity correspondence, the hydrodynamic response
coefficients, shear and Hall viscosities, have been studied. The holographic
model of Einstein-Maxwell- AdS $(3+1)$-dimensional system additionally coupled
with the another gauge field mimicking the {\it dark matter} sector, as well
as, gravitational Chern-Simons term bounded with a dynamical scalar field, were
taken into account. Condensation of the scalar field provides the parity
violating term. Both shear and Hall viscosities have been calculated and their
dependence on $\alpha$ - the coupling constant between matter and {\it dark
matter} sectors has been studied. To the lowest order in the derivative
expansion and perturbation in $\alpha$, the shear viscosity is not influenced
by the {\it dark matter}, while the Hall component linearly depends on
$\alpha$.Comment: JHEP style, this version meets the published one, JHEP08 (2016) 12
|
Viscosity of holographic fluid in the presence of dark matter sector
|
viscosity of holographic fluid in the presence of dark matter sector
|
correspondence hydrodynamic hall viscosities studied. holographic einstein maxwell additionally mimicking gravitational chern simons account. condensation parity violating term. hall viscosities alpha sectors studied. perturbation alpha viscosity influenced hall linearly alpha .comment jhep style meets jhep
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non_dup
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[] |
42738083
|
10.1007/JHEP08(2016)125
|
We propose a new approach to the LHC dark matter search analysis within the
effective field theory (EFT) framework by utilising the K-matrix unitarisation
formalism. This approach provides a reasonable estimate of the dark matter
production cross section at high energies, and hence allows reliable bounds to
be placed on the cut-off scale of relevant operators without running into the
problem of perturbative unitarity violation. We exemplify this procedure for
the effective operator D5 in monojet dark matter searches in the collinear
approximation. We compare our bounds to those obtained using the truncation
method and identify a parameter region where the unitarisation prescription
leads to more stringent bounds.Comment: 20 pages, 7 figures. References added and minor corrections made to
match published versio
|
Unitarisation of EFT Amplitudes for Dark Matter Searches at the LHC
|
unitarisation of eft amplitudes for dark matter searches at the lhc
|
propose utilising unitarisation formalism. reasonable reliable bounds placed running perturbative unitarity violation. exemplify monojet searches collinear approximation. bounds truncation unitarisation prescription stringent pages figures. minor match versio
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non_dup
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[] |
42743832
|
10.1007/JHEP08(2016)126
|
A consistent theoretical description of physics at high energies requires an
assessment of vacuum stability in either the Standard Model or any extension of
it. Especially supersymmetric extensions allow for several vacua and the choice
of the desired electroweak one gives strong constraints on the parameter space.
As the general parameter space in the Minimal Supersymmetric Standard Model is
huge, any severe constraint on it unrelated to direct phenomenological
observations enhances the predictability of the model. We perform an updated
analysis of possible charge and color breaking minima without relying on fixed
directions in field space that minimize certain terms in the potential (known
as "D-flat" directions). Concerning the cosmological stability of false vacua,
we argue that there are always directions in configuration space which lead to
very short-lived vacua and therefore such exclusions are strict. In addition to
existing strong constraints on the parameter space, we find even stronger
constraints extending the field space compared to previous analyses and combine
those constraints with predictions for the light CP-even Higgs mass in the
Minimal Supersymmetric Standard Model. Low masses for supersymmetric partners
are excluded from vacuum stability in combination with the 125 GeV Higgs and
the allowed parameter space opens at a few TeV.Comment: 32 pages, 10 figures; v3: typos corrected, matches version to be
published in JHE
|
A new view on vacuum stability in the MSSM
|
a new view on vacuum stability in the mssm
|
supersymmetric extensions vacua desired electroweak space. supersymmetric huge unrelated phenomenological enhances predictability model. updated breaking minima relying directions minimize directions concerning cosmological false vacua argue directions lived vacua exclusions strict. stronger extending combine supersymmetric model. supersymmetric partners excluded opens pages typos corrected matches
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non_dup
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[] |
42660390
|
10.1007/JHEP08(2016)128
|
Left-Right (LR) models are extensions of the Standard Model where left-right
symmetry is restored at high energies, and which are strongly constrained by
kaon mixing described in the framework of the $|\Delta S|=2$ effective
Hamiltonian. We consider the short-distance QCD corrections to this Hamiltonian
both in the Standard Model (SM) and in LR models. The leading logarithms
occurring in these short-distance corrections can be resummed within a
rigourous Effective Field Theory (EFT) approach integrating out heavy degrees
of freedom progressively, or using an approximate simpler method of regions
identifying the ranges of loop momentum generating large logarithms in the
relevant two-loop diagrams. We compare the two approaches in the SM at
next-to-leading order, finding a very good agreement when one scale dominates
the problem, but only a fair agreement in the presence of a large logarithm at
leading order. We compute the short-distance QCD corrections for LR models at
next-to-leading order using the method of regions, and we compare the results
with the EFT approach for the $WW'$ box with two charm quarks (together with
additional diagrams forming a gauge-invariant combination), where a large
logarithm occurs already at leading order. We conclude by providing
next-to-leading-order estimates for $cc$, $ct$ and $tt$ boxes in LR models.Comment: Accepted for publication in JHE
|
Short-distance QCD corrections to $K^0\bar{K}^0$ mixing at
next-to-leading order in Left-Right models
|
short-distance qcd corrections to $k^0\bar{k}^0$ mixing at next-to-leading order in left-right models
|
extensions restored constrained kaon delta hamiltonian. models. logarithms occurring resummed rigourous integrating freedom progressively approximate simpler identifying ranges generating logarithms diagrams. dominates fair logarithm order. charm quarks diagrams forming logarithm order. boxes publication
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non_dup
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[] |
42684058
|
10.1007/JHEP08(2016)129
|
Fractional statistics and quantum chaos are both phenomena associated with
the non-local storage of quantum information. In this article, we point out a
connection between the butterfly effect in (1+1)-dimensional rational conformal
field theories and fractional statistics in (2+1)-dimensional topologically
ordered states. This connection comes from the characterization of the
butterfly effect by the out-of-time-order-correlator proposed recently. We show
that the late-time behavior of such correlators is determined by universal
properties of the rational conformal field theory such as the modular S-matrix
and conformal spins. Using the bulk-boundary correspondence between rational
conformal field theories and (2+1)-dimensional topologically ordered states, we
show that the late time behavior of out-of-time-order-correlators is
intrinsically connected with fractional statistics in the topological order. We
also propose a quantitative measure of chaos in a rational conformal field
theory, which turns out to be determined by the topological entanglement
entropy of the corresponding topological order.Comment: Published version, 1+25 pages, 10 figure
|
Fractional Statistics and the Butterfly Effect
|
fractional statistics and the butterfly effect
|
fractional chaos phenomena storage information. connection butterfly rational conformal fractional topologically ordered states. connection comes butterfly correlator recently. correlators universal rational conformal modular conformal spins. correspondence rational conformal topologically ordered correlators intrinsically fractional topological order. propose chaos rational conformal turns topological entanglement topological pages
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non_dup
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[] |
42740888
|
10.1007/JHEP08(2016)130
|
We investigate the short interval expansion of the R\'enyi entropy for
two-dimensional conformal field theory (CFT) on a torus. We require the length
of the interval $\ell$ to be small with respect to the spatial and temporal
sizes of the torus. The operator product expansion of the twist operators
allows us to compute the short interval expansion of the R\'enyi entropy at any
temperature. In particular, we pay special attention to the large $c$ CFTs dual
to the AdS$_3$ gravity and its cousins. At both low and high temperature
limits, we read the R\'enyi entropies to order $\ell^6$, and find good
agreements with holographic results. Moreover, the expansion allows us to read
$1/c$ contribution, which is hard to get by expanding the thermal density
matrix. We generalize the study to the case with the chemical potential as
well.Comment: 19 pages; V2, 19 pages, typos corrected, published versio
|
Short interval expansion of R\'enyi entropy on torus
|
short interval expansion of r\'enyi entropy on torus
|
enyi conformal torus. sizes torus. twist enyi temperature. cfts cousins. read enyi entropies agreements holographic results. read expanding matrix. generalize pages pages typos corrected versio
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non_dup
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42723288
|
10.1007/JHEP08(2016)132
|
The KKLT construction of dS vacua relies on an uplift term that arises from
an anti-D3-brane. It was argued by Kachru, Pearson and Verlinde that this
anti-D3-brane is an excited state in a supersymmetric theory since it can decay
to a supersymmetric ground state. Hence the anti-D3-brane breaks supersymmetry
spontaneously and one should be able to package all the world-volume fields on
the anti-D3-brane into a four dimensional $\cal{N}=1$ supersymmetric action.
Here we extend previous results and identify the constrained superfields that
correspond to all the degrees of freedom on the anti-D3-brane. In particular,
we show explicitly that the four 4D worldvolume spinors give rise to
constrained chiral multiplets $S$ and $Y^i$, $i=1,2,3$ that satisfy
$S^2=SY^i=0$. We also conjecture (and provide evidence in a forthcoming
publication) that the vector field $A_\mu$ and the three scalars $\phi^i$ give
rise to a field strength multiplet $W_\alpha$ and three chiral multiplets $H^i$
that satisfy the constraints $S W_\alpha= \bar{D}_{\dot \alpha} (S \bar
H^i)=0$. This is the first time that such constrained multiplets appear in
string theory constructions.Comment: 20 pages, v2: references adde
|
Constrained superfields from an anti-D3-brane in KKLT
|
constrained superfields from an anti-d3-brane in kklt
|
kklt vacua relies uplift arises brane. argued kachru pearson verlinde brane excited supersymmetric supersymmetric state. brane breaks supersymmetry spontaneously package brane supersymmetric action. extend constrained superfields freedom brane. explicitly worldvolume spinors constrained chiral multiplets satisfy conjecture forthcoming publication scalars multiplet alpha chiral multiplets satisfy alpha alpha constrained multiplets pages adde
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non_dup
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42744161
|
10.1007/JHEP08(2016)134
|
We compute two-loop form factors of operators in the $SU(2|3)$ closed
subsector of $N=4$ supersymmetric Yang-Mills. In particular, we focus on the
non-protected, dimension-three operators $\mathrm{Tr} (X[Y,Z])$ and
$\mathrm{Tr} ( \psi \psi)$ for which we compute the four possible two-loop form
factors, and corresponding remainder functions, with external states $\langle
\bar{X} \bar{Y} \bar{Z}|$ and $\langle \bar{\psi} \bar{\psi}|$. Interestingly,
the maximally transcendental part of the two-loop remainder of $\langle\bar{X}
\bar{Y} \bar{Z}| \mathrm{Tr} (X[Y,Z]) |0\rangle$ turns out to be identical to
that of the corresponding known quantity for the half-BPS operator $\mathrm{Tr}
(X^3)$. We also find a surprising connection between the terms subleading in
transcendentality and certain a priori unrelated remainder densities introduced
in the study of the spin chain Hamiltonian in the SU(2) sector. Next, we use
our calculation to resolve the mixing, recovering anomalous dimensions and
eigenstates of the dilatation operator in the SU(2|3) sector at two loops. We
also speculate on potential connections between our calculations in $N=4$ super
Yang-Mills and Higgs + multi-gluon amplitudes in QCD in an effective Lagrangian
approach.Comment: 40+1 pages, v3: typos corrected, version published in JHE
|
The SU(2|3) dynamic two-loop form factors
|
the su(2|3) dynamic two-loop form factors
|
subsector supersymmetric mills. protected mathrm mathrm remainder langle langle interestingly maximally transcendental remainder langle mathrm rangle turns quantity mathrm surprising connection subleading transcendentality priori unrelated remainder densities sector. resolve recovering anomalous eigenstates dilatation loops. speculate connections super mills gluon amplitudes lagrangian pages typos corrected
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non_dup
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42726179
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10.1007/JHEP08(2016)135
|
We review and investigate different aspects of scalar fields in supergravity
theories both when they parametrize symmetric spaces and when they parametrize
spaces of special holonomy which are not necessarily symmetric (Kahler and
Quaternionic-Kahler spaces): their role in the definition of derivatives of the
fermions covariant under the R-symmetry group and (in gauged supergravities)
under some gauge group, their dualization into (d-2)-forms, their role in the
supersymmetry transformation rules (via fermion shifts, for instance) etc. We
find a general definition of momentum map that applies to any manifold
admitting a Killing vector and coincides with those of the holomorphic and
tri-holomorphic momentum maps in Kahler and Quaternionic-Kahler spaces and with
an independent definition that can be given in symmetric spaces. We show how
the momentum map occurs ubiquitously: in gauge-covariant derivatives of
fermions, in fermion shifts, in the supersymmetry transformation rules of
(d-2)-forms etc. We also give the general structure of the
Noether-Gaillard-Zumino conserved currents in theories with fields of different
ranks in any dimension.Comment: 62 pages. A few minor misprints correcte
|
On the dualization of scalars into (d-2)-forms in supergravity. Momentum
maps, R-symmetry and gauged supergravity
|
on the dualization of scalars into (d-2)-forms in supergravity. momentum maps, r-symmetry and gauged supergravity
|
supergravity parametrize parametrize holonomy necessarily kahler quaternionic kahler derivatives fermions covariant gauged supergravities dualization supersymmetry fermion shifts etc. applies manifold admitting killing coincides holomorphic holomorphic kahler quaternionic kahler spaces. ubiquitously covariant derivatives fermions fermion shifts supersymmetry etc. noether gaillard zumino conserved currents ranks pages. minor misprints correcte
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non_dup
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42720926
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10.1007/JHEP08(2016)136
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D3 branes stretching between webs of (p,q) 5branes provide an interesting
class of 3d N=2 theories. For generic pq-webs however the low energy field
theory is not known. We use 3d mirror symmetry and Type IIB S-duality to
construct Abelian gauge theories corresponding to D3 branes ending on both
sides of a pq-web made of many coincident NS5's intersecting one D5. These
theories contain chiral monopole operators in the superpotential and enjoy a
non trivial pattern of global symmetry enhancements. In the special case of the
pq-web with one D5 and one NS5, the 3d low energy SCFT admits three dual
formulations. This triality can be applied locally inside bigger quiver gauge
theories. We prove our statements using partial mirror symmetry `a la
Kapustin-Strassler, showing the equality of the S^3_b partition functions and
studying the quantum chiral rings.Comment: 52 pages, 20 figure
|
3d N=2 mirror symmetry, pq-webs and monopole superpotentials
|
3d n=2 mirror symmetry, pq-webs and monopole superpotentials
|
branes stretching webs branes theories. generic webs known. mirror duality abelian branes ending sides coincident intersecting chiral monopole superpotential enjoy trivial enhancements. scft admits formulations. triality locally bigger quiver theories. statements mirror kapustin strassler equality partition studying chiral pages
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non_dup
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42735225
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10.1007/JHEP08(2016)138
|
The problem with the U-duality transformation of membrane on $T^{n}$ is
recently addressed in [arXiv:1509.02915 [hep-th]]. We will consider the
U-duality transformation rule of membrane on $T^{n}\times R$. It turns out that
winding modes on $T^{n}$ should be taken into account, since the duality
transformation may bring the membrane configuration without winding modes into
the one with winding modes. With the winding modes added, the membrane
worldvolume theory in lightcone gauge is equivalent to the $n+1$ dimensional
super-Yang-Mills (SYM) theory in $\tilde{T}^{n}$, which has $SL(2,Z)\times
SL(3,Z)$ and $SL(5,Z)$ symmetries for $n=3$ and $n=4$, respectively. The
$SL(2,Z)\times SL(3,Z)$ transformation can be realized classically, making the
on-shell field configurations transformed into each other. However, the
$SL(5,Z)$ symmetry may only be realized at the quantum level, since the
classical $5d$ SYM field configurations cannot form the representation of
$SL(5,Z)$.Comment: 19 pages; v2: 20 pages, reference corrected, extended discussion in
section 5, journal versio
|
U-duality transformation of membrane on $T^{n}$ revisited
|
u-duality transformation of membrane on $t^{n}$ revisited
|
duality addressed duality turns winding duality bring winding winding modes. winding worldvolume lightcone super mills tilde symmetries respectively. realized classically configurations transformed other. realized configurations .comment pages pages corrected versio
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non_dup
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42668773
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10.1007/JHEP08(2016)141
|
We define a nonabelian version of particle-vortex duality, by dimensionally
extending usual (1+1)-dimensional nonabelian T-duality to (2+1) dimensions.
While we will explicitly describe a global $SU(2)$ symmetry, our methods can
also be applied to a larger group $G$, by gauging an appropriate subgroup. We
will exemplify our duality with matter in both adjoint and fundamental
representations by considering a modification of ${\cal N}=2$ supersymmetric
Yang-Mills theory (Seiberg-Witten theory reduced to (2+1) dimensions), and an
$SU(2)\times U(1)$ color-flavor locked theory that exhibits nonabelian vortex
solutions.Comment: 23 pages, no figure
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A nonabelian particle-vortex duality in gauge theories
|
a nonabelian particle-vortex duality in gauge theories
|
nonabelian vortex duality dimensionally extending usual nonabelian duality dimensions. explicitly gauging subgroup. exemplify duality adjoint representations modification supersymmetric mills seiberg witten flavor locked exhibits nonabelian vortex pages
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non_dup
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29544008
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10.1007/JHEP08(2016)142
|
We propose field equations for the conformal higher spin system in three
dimensions coupled to a conformal scalar field with a sixth order potential.
Both the higher spin equation and the unfolded equation for the scalar field
have source terms and are based on a conformal higher spin algebra which we
treat as an expansion in multi-commutators. Explicit expressions for the source
terms are suggested and subjected to some simple tests. We also discuss a
cascading relation between the Chern-Simons action for the higher spin gauge
theory and an action containing a term for each spin that generalizes the spin
2 Chern-Simons action in terms of the spin connection expressed in terms of the
frame field. This cascading property is demonstrated in the free theory for
spin 3 but should work also in the complete higher spin theory.Comment: v2: 20 pages, misprints corrected, footnotes adde
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On the conformal higher spin unfolded equation for a three-dimensional
self-interacting scalar field
|
on the conformal higher spin unfolded equation for a three-dimensional self-interacting scalar field
|
propose conformal conformal sixth potential. unfolded conformal treat commutators. expressions subjected tests. cascading chern simons generalizes chern simons connection field. cascading pages misprints corrected footnotes adde
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non_dup
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42732077
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10.1007/JHEP08(2016)143
|
We develop a polynomial reduction procedure that transforms any gauge fixed
CHY amplitude integrand for $n$ scattering particles into a $\sigma$-moduli
multivariate polynomial of what we call the $\textit{standard form}$. We show
that a standard form polynomial must have a specific $\textit{ladder type}$
monomial structure, which has finite size at any $n$, with highest multivariate
degree given by $(n-3)(n-4)/2$. This set of monomials spans a complete basis
for polynomials with rational coefficients in kinematic data on the support of
scattering equations. Subsequently, at tree and one-loop level, we employ the
global residue theorem to derive a prescription that evaluates any CHY
amplitude by means of collecting simple residues at infinity only. The
prescription is then applied explicitly to some tree and one-loop amplitude
examples.Comment: 28 pages, published versio
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Polynomial reduction and evaluation of tree- and loop-level CHY
amplitudes
|
polynomial reduction and evaluation of tree- and loop-level chy amplitudes
|
transforms integrand sigma moduli multivariate call textit textit ladder monomial multivariate monomials spans polynomials rational kinematic equations. subsequently employ residue derive prescription evaluates collecting infinity only. prescription explicitly pages versio
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42737245
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10.1007/JHEP08(2016)144
|
In this paper we wish to find the corresponding Gibbons-Hawking-York term for
the most general quadratic in curvature gravity by using Coframe slicing within
the Arnowitt-Deser-Misner (ADM) decomposition of spacetime in four dimensions.
In order to make sure that the higher derivative gravity is ghost and tachyon
free at a perturbative level, one requires infinite covariant derivatives,
which yields a generalised covariant infinite derivative theory of gravity. We
will be exploring the boundary term for such a covariant infinite derivative
theory of gravity.Comment: 37 page
|
Generalised Boundary Terms for Higher Derivative Theories of Gravity
|
generalised boundary terms for higher derivative theories of gravity
|
wish gibbons hawking quadratic curvature coframe slicing arnowitt deser misner decomposition spacetime dimensions. sure ghost tachyon perturbative infinite covariant derivatives generalised covariant infinite gravity. exploring covariant infinite
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non_dup
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42737783
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10.1007/JHEP08(2016)145
|
We show how to correctly treat threshold singularities in fixed-order
perturbative calculations of the electron anomalous magnetic moment and
hadronic pair production processes such as top pair production. With respect to
the former, we demonstrate the equivalence of the "non-perturbative", resummed
treatment of the vacuum polarization contribution, whose spectral function
exhibits bound state poles, with the fixed-order calculation by identifying a
threshold localized term in the four-loop spectral function. In general, we
find that a modification of the dispersion relation by threshold subtractions
is required to make fixed-order calculations well-defined and provide the
subtraction term. We then solve the apparent problem of a divergent convolution
of the partonic cross section with the parton luminosity in the computation of
the top pair production cross section starting from the fourth-order
correction. We find that when the computation is performed in the usual way as
an integral of real and virtual corrections over phase space at a given order
in the expansion in the strong coupling, an additional contribution has to be
added at N3LO.Comment: 15 pages, 3 figure
|
Threshold singularities, dispersion relations and fixed-order
perturbative calculations
|
threshold singularities, dispersion relations and fixed-order perturbative calculations
|
correctly treat singularities perturbative anomalous moment hadronic production. former equivalence perturbative resummed exhibits poles identifying localized function. modification subtractions subtraction term. solve apparent divergent convolution partonic parton luminosity fourth correction. usual virtual pages
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non_dup
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42697224
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10.1007/JHEP08(2016)146
|
In the context of non-geometric type II orientifold compactifications, there
have been two formulations for representing the various NS-NS
Bianchi-identities. In the first formulation, the standard three-form flux
($H_3$), the geometric flux ($\omega$) and the non-geometric fluxes ($Q$ and
$R$) are expressed by using the real six-dimensional indices (e.g. $H_{ijk},
\omega_{ij}{}^k, Q_i{}^{jk}$ and $R^{ijk}$), and this formulation has been
heavily utilized for simplifying the scalar potentials in
toroidal-orientifolds. On the other hand, relevant for the studies beyond
toroidal backgrounds, a second formulation is utilized in which all flux
components are written in terms of various involutively even/odd $(2,1)$- and
$(1,1)$-cohomologies of the complex threefold. In the lights of recent model
building interests and some observations made in arXiv:0705.3410 and
arXiv:0709.2186, in this article, we revisit two most commonly studied toroidal
examples in detail to illustrate that the present forms of these two
formulations are not completely equivalent. To demonstrate the same, we
translate all the identities of the first formulation into cohomology
ingredients, and after a tedious reshuffling of the subsequent constraints,
interestingly we find that all the identities of the second formulation are
embedded into the first formulation which has some additional constraints. In
addition, we look for the possible solutions of these Bianchi identities in a
detailed analysis, and we find that some solutions can reduce the size of
scalar potential very significantly, and in some cases are too strong to break
the no-scale structure completely. Finally, we also comment on the influence of
imposing some of the solutions of Bianchi identities in studying moduli
stabilization.Comment: version 3: 46 pages; improved presentation with some clarifications
added on page 18; to appear in JHE
|
Revisiting the two formulations of Bianchi identities and their
implications on moduli stabilization
|
revisiting the two formulations of bianchi identities and their implications on moduli stabilization
|
geometric orientifold compactifications formulations representing bianchi identities. formulation geometric omega geometric fluxes indices e.g. omega formulation heavily utilized simplifying potentials toroidal orientifolds. toroidal backgrounds formulation utilized involutively cohomologies threefold. lights interests revisit commonly toroidal illustrate formulations equivalent. translate identities formulation cohomology ingredients tedious reshuffling interestingly identities formulation embedded formulation constraints. look bianchi identities break completely. comment imposing bianchi identities studying moduli pages presentation clarifications
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non_dup
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42667444
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10.1007/JHEP08(2016)148
|
We demonstrate that Kerr-CFT duality can be extended to super-entropic black
holes, which have non-compact horizons with finite area. We demonstrate that
this duality is robust insofar as the ultra-spinning limit of a Kerr-AdS black
hole (which yields the super-entropic class)commutes with the near-horizon
limit (which yields the Kerr-CFT duality). Consequently the Bekeinstein-Hawking
and the CFT entropies are equivalent. We show that the duality holds for both
singly-spinning super-entropic black holes in 4 dimensions and for
doubly-spinning super-entropic black holes of gauged supergravity in 5
dimensions. In both cases we obtain not only the expected left/right
temperatures, but also temperatures associated with electric charge and with a
new thermodynamic parameter specific to super-entropic black holes.Comment: 10 pages and 1 figur
|
Super-Entropic Black Holes and the Kerr-CFT Correspondence
|
super-entropic black holes and the kerr-cft correspondence
|
kerr duality super entropic holes horizons area. duality robust insofar ultra spinning kerr super entropic commutes horizon kerr duality bekeinstein hawking entropies equivalent. duality singly spinning super entropic holes doubly spinning super entropic holes gauged supergravity dimensions. thermodynamic super entropic pages figur
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non_dup
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42734290
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10.1007/JHEP08(2016)151
|
We discuss a simple model of thermal relic dark matter whose mass can be much
larger than the so-called unitarity limit on the mass of point-like particle
dark matter. The model consists of new strong dynamics with one flavor of
fermions in the fundamental representation which is much heavier than the
dynamical scale of the new strong dynamics. Dark matter is identified with the
lightest baryonic hadron of the new dynamics. The baryonic hadrons annihilate
into the mesonic hadrons of the new strong dynamics when they have large radii.
Resultantly, thermal relic dark matter with a mass in the PeV range is
possible.Comment: 24 pages, 10 figure
|
Thermal Relic Dark Matter Beyond the Unitarity Limit
|
thermal relic dark matter beyond the unitarity limit
|
relic unitarity matter. flavor fermions heavier dynamics. lightest baryonic hadron dynamics. baryonic hadrons annihilate mesonic hadrons radii. resultantly relic pages
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non_dup
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42744286
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10.1007/JHEP08(2016)152
|
We show that scattering amplitudes in planar N = 4 Super Yang-Mills in
multi-Regge kinematics can naturally be expressed in terms of single-valued
iterated integrals on the moduli space of Riemann spheres with marked points.
As a consequence, scattering amplitudes in this limit can be expressed as
convolutions that can easily be computed using Stokes' theorem. We apply this
framework to MHV amplitudes to leading-logarithmic accuracy (LLA), and we prove
that at L loops all MHV amplitudes are determined by amplitudes with up to L +
4 external legs. We also investigate non-MHV amplitudes, and we show that they
can be obtained by convoluting the MHV results with a certain helicity flip
kernel. We classify all leading singularities that appear at LLA in the Regge
limit for arbitrary helicity configurations and any number of external legs.
Finally, we use our new framework to obtain explicit analytic results at LLA
for all MHV amplitudes up to five loops and all non-MHV amplitudes with up to
eight external legs and four loops.Comment: 104 pages, six awesome figures and ancillary files containing the
results in Mathematica forma
|
Multi-Regge kinematics and the moduli space of Riemann spheres with
marked points
|
multi-regge kinematics and the moduli space of riemann spheres with marked points
|
amplitudes planar super mills regge kinematics naturally valued iterated integrals moduli riemann spheres marked points. amplitudes convolutions stokes theorem. amplitudes logarithmic loops amplitudes amplitudes legs. amplitudes convoluting helicity flip kernel. classify singularities regge helicity configurations legs. analytic amplitudes loops amplitudes eight legs pages awesome ancillary files mathematica forma
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non_dup
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42742843
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10.1007/JHEP08(2016)153
|
If a sterile neutrino nu_s with an eV-scale mass and a sizeable mixing to the
electron neutrino exists, as indicated by the reactor and gallium neutrino
anomalies, a strong resonance enhancement of nu_e-nu_s oscillations of
atmospheric neutrinos should occur in the TeV energy range. At these energies
neutrino flavour transitions in the 3+1 scheme depend on just one neutrino mass
squared difference and are fully described within a 3-flavour oscillation
framework. We demonstrate that the flavour transitions of atmospheric nu_e can
actually be very accurately described in a 2-flavour framework, with neutrino
flavour evolution governed by an inhomogeneous Schroedinger-like equation.
Evolution equations of this type have not been previously considered in the
theory of neutrino oscillations.Comment: 10 pages, 2 figures. v2: typos corrected. v3: some equations in
section 2 reordered, section 3 expanded, figures enhanced and figure captions
improved following referee's suggestions. Matches JHEP versio
|
Atmospheric neutrinos, $nu_e-nu_s$ oscillations, and a novel neutrino
evolution equation
|
atmospheric neutrinos, $nu_e-nu_s$ oscillations, and a novel neutrino evolution equation
|
sterile sizeable reactor gallium anomalies enhancement oscillations neutrinos range. flavour squared flavour oscillation framework. flavour accurately flavour flavour governed inhomogeneous schroedinger equation. pages figures. typos corrected. reordered expanded captions referee suggestions. matches jhep versio
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non_dup
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42715312
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10.1007/JHEP08(2016)154
|
The framework of exceptional field theory is extended by introducing
consistent deformations of its generalised Lie derivative. For the first time,
massive type IIA supergravity is reproduced geometrically as a solution of the
section constraint. This provides a unified description of all ten- and
eleven-dimensional maximal supergravities. The action of the E7 deformed theory
is constructed, and reduces to those of exceptional field theory and gauged
maximal supergravity in respective limits. The relation of this new framework
to other approaches for generating the Romans mass non-geometrically is
discussed.Comment: 39 pages. v2: typos corrected, references added. v3: typos corrected,
references added, published versio
|
The exceptional story of massive IIA supergravity
|
the exceptional story of massive iia supergravity
|
exceptional introducing deformations generalised derivative. massive supergravity reproduced geometrically constraint. unified eleven maximal supergravities. deformed reduces exceptional gauged maximal supergravity respective limits. generating romans geometrically pages. typos corrected added. typos corrected versio
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non_dup
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42750709
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10.1007/JHEP08(2016)155
|
For the first time the next-to-leading-order electroweak corrections to the
full off-shell production of two top quarks that decay leptonically are
presented. This calculation includes all off-shell, non-resonant, and
interference effects for the 6-particle phase space. While the electroweak
corrections are below one per cent for the integrated cross section, they reach
up to 15% in the high-transverse-momentum region of distributions. To support
the results of the complete one-loop calculation, we have in addition evaluated
the electroweak corrections in two different pole approximations, one requiring
two on-shell top quarks and one featuring two on-shell W bosons. While the
former deviates by up to 10% from the full calculation for certain
distributions, the latter provides a very good description for most
observables. The increased centre-of-mass energy of the LHC makes the inclusion
of electroweak corrections extremely relevant as they are particularly large in
the Sudakov regime where new physics is expected to be probed.Comment: 33 pages,23 eps-figures. Matches the published version. Typo fixed in
equations (2.18) and (2.19
|
NLO electroweak corrections to off-shell top-antitop production with
leptonic decays at the LHC
|
nlo electroweak corrections to off-shell top-antitop production with leptonic decays at the lhc
|
electroweak quarks leptonically presented. resonant interference space. electroweak cent distributions. electroweak pole approximations requiring quarks featuring bosons. former deviates observables. inclusion electroweak extremely sudakov pages figures. matches version. typo
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non_dup
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42678555
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10.1007/JHEP08(2016)156
|
QED with a large number $N$ of massless fermionic degrees of freedom has a
conformal phase in a range of space-time dimensions. We use a large $N$
diagrammatic approach to calculate the leading corrections to $C_T$, the
coefficient of the two-point function of the stress-energy tensor, and $C_J$,
the coefficient of the two-point function of the global symmetry current. We
present explicit formulae as a function of $d$ and check them versus the
expectations in 2 and $4-\epsilon$ dimensions. Using our results in higher even
dimensions we find a concise formula for $C_T$ of the conformal Maxwell theory
with higher derivative action $F_{\mu \nu} (-\nabla^2)^{\frac{d}{2}-2} F^{\mu
\nu}$. In $d=3$, QED has a topological symmetry current, and we calculate the
correction to its two-point function coefficient, $C^{\textrm{top}}_{J}$. We
also show that some RG flows involving QED in $d=3$ obey $C_T^{\rm UV} >
C_T^{\rm IR}$ and discuss possible implications of this inequality for the
symmetry breaking at small values of $N$.Comment: 29 pages, 9 figures. v3: minor improvements, references adde
|
On $C_{J}$ and $C_{T}$ in Conformal QED
|
on $c_{j}$ and $c_{t}$ in conformal qed
|
massless fermionic freedom conformal dimensions. diagrammatic current. formulae check expectations epsilon dimensions. concise conformal maxwell nabla frac topological textrm flows involving obey inequality breaking .comment pages figures. minor improvements adde
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non_dup
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42742170
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10.1007/JHEP08(2016)157
|
We revisit the production of baryon asymmetries in the minimal type I seesaw
model with heavy Majorana singlets in the GeV range. In particular we include
"washout" effects from scattering processes with gauge bosons, Higgs decays and
inverse decays, besides the dominant top scatterings. We show that in the
minimal model with two singlets, and for an inverted light neutrino ordering,
future measurements from SHiP and neutrinoless double beta decay could in
principle provide sufficient information to predict the matter-antimatter
asymmetry in the universe. We also show that SHiP measurements could provide
very valuable information on the PMNS CP phases.Comment: Minor changes to match JHEP versio
|
Testable Baryogenesis in Seesaw Models
|
testable baryogenesis in seesaw models
|
revisit baryon asymmetries seesaw majorana singlets range. washout bosons decays decays besides scatterings. singlets inverted ordering ship neutrinoless beta predict antimatter asymmetry universe. ship valuable pmns minor match jhep versio
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non_dup
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42682304
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10.1007/JHEP08(2016)158
|
We explore holographic entanglement entropy in ten-dimensional supergravity
solutions. It has been proposed that entanglement entropy can be computed in
such top-down models using minimal surfaces which asymptotically wrap the
compact part of the geometry. We show explicitly in a wide range of examples
that the holographic entanglement entropy thus computed agrees with the
entanglement entropy computed using the Ryu-Takayanagi formula from the
lower-dimensional Einstein metric obtained from reduction over the compact
space. Our examples include not only consistent truncations but also cases in
which no consistent truncation exists and Kaluza-Klein holography is used to
identify the lower-dimensional Einstein metric. We then give a general proof,
based on the Lewkowycz-Maldacena approach, of the top-down entanglement entropy
formula.Comment: 40 page
|
Entanglement entropy in top-down models
|
entanglement entropy in top-down models
|
explore holographic entanglement supergravity solutions. entanglement asymptotically wrap geometry. explicitly holographic entanglement agrees entanglement takayanagi einstein space. truncations truncation kaluza klein holography einstein metric. lewkowycz maldacena entanglement
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non_dup
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42711785
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10.1007/JHEP08(2016)160
|
We present a new algorithm to construct a purely four dimensional
representation of higher-order perturbative corrections to physical
cross-sections at next-to-leading order (NLO). The algorithm is based on the
loop-tree duality (LTD), and it is implemented by introducing a suitable
mapping between the external and loop momenta of the virtual scattering
amplitudes, and the external momenta of the real emission corrections. In this
way, the sum over degenerate infrared states is performed at integrand level
and the cancellation of infrared divergences occurs locally without introducing
subtraction counter-terms to deal with soft and final-state collinear
singularities. The dual representation of ultraviolet counter-terms is also
discussed in detail, in particular for self-energy contributions. The method is
first illustrated with the scalar three-point function, before proceeding with
the calculation of the physical cross-section for $\gamma^* \to q \bar{q}(g)$,
and its generalisation to multi-leg processes. The extension to
next-to-next-to-leading order (NNLO) is briefly commented.Comment: 39 pages, 7 figures. Final version published in JHE
|
Four-dimensional unsubtraction from the loop-tree duality
|
four-dimensional unsubtraction from the loop-tree duality
|
purely perturbative duality implemented introducing momenta virtual amplitudes momenta corrections. degenerate infrared integrand cancellation infrared divergences locally introducing subtraction counter deal collinear singularities. ultraviolet counter contributions. illustrated proceeding gamma generalisation processes. nnlo briefly pages figures.
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non_dup
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42750064
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10.1007/JHEP08(2016)161
|
We study the holographic dual description of a superconductor in which the
gravity sector consists of a Maxwell field and a charged scalar field which
except its minimal coupling to gravity it is also coupled kinematically to
Einstein tensor. As the strength of the new coupling is increased, the critical
temperature below which the scalar field condenses is lowering, the
condensation gap decreases faster than the temperature, the width of the
condensation gap is not proportional to the size of the condensate and at low
temperatures the condensation gap tends to zero for the strong coupling. These
effects which are the result of the presence of the coupling of the scalar
field to the Einstein tensor in the gravity bulk, provide a dual description of
impurities concentration in a superconducting state on the boundary.Comment: 9 pages, 4 figures; V2: References added; Version accepted for
publication in JHE
|
Building a Holographic Superconductor with a Scalar Field Coupled
Kinematically to Einstein Tensor
|
building a holographic superconductor with a scalar field coupled kinematically to einstein tensor
|
holographic superconductor maxwell kinematically einstein tensor. condenses lowering condensation faster condensation condensate condensation tends coupling. einstein impurities superconducting pages publication
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non_dup
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42738674
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10.1007/JHEP08(2016)162
|
We argue that the degrees of freedom in a d-dimensional CFT can be
re-organized in an insightful way by studying observables on the moduli space
of causal diamonds (or equivalently, the space of pairs of timelike separated
points). This 2d-dimensional space naturally captures some of the fundamental
nonlocality and causal structure inherent in the entanglement of CFT states.
For any primary CFT operator, we construct an observable on this space, which
is defined by smearing the associated one-point function over causal diamonds.
Known examples of such quantities are the entanglement entropy of vacuum
excitations and its higher spin generalizations. We show that in holographic
CFTs, these observables are given by suitably defined integrals of dual bulk
fields over the corresponding Ryu-Takayanagi minimal surfaces. Furthermore, we
explain connections to the operator product expansion and the first law of
entanglement entropy from this unifying point of view. We demonstrate that for
small perturbations of the vacuum, our observables obey linear two-derivative
equations of motion on the space of causal diamonds. In two dimensions, the
latter is given by a product of two copies of a two-dimensional de Sitter
space. For a class of universal states, we show that the entanglement entropy
and its spin-three generalization obey nonlinear equations of motion with local
interactions on this moduli space, which can be identified with Liouville and
Toda equations, respectively. This suggests the possibility of extending the
definition of our new observables beyond the linear level more generally and in
such a way that they give rise to new dynamically interacting theories on the
moduli space of causal diamonds. Various challenges one has to face in order to
implement this idea are discussed.Comment: 84 pages, 12 figures; v2: expanded discussion on constraints in
section 7, matches published versio
|
Entanglement, Holography and Causal Diamonds
|
entanglement, holography and causal diamonds
|
argue freedom organized insightful studying observables moduli causal diamonds equivalently timelike separated naturally captures nonlocality causal inherent entanglement states. observable smearing causal diamonds. quantities entanglement excitations generalizations. holographic cfts observables suitably integrals takayanagi surfaces. connections entanglement unifying view. perturbations observables obey causal diamonds. copies sitter space. universal entanglement generalization obey moduli liouville toda respectively. extending observables dynamically interacting moduli causal diamonds. challenges implement pages expanded matches versio
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non_dup
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42665301
|
10.1007/JHEP08(2016)163
|
The discussions on the connection between gravity and thermodynamics attract
much attention recently. We consider a static self-gravitating perfect fluid
system in $f(R)$ gravity, which is an important theory could explain the
accelerated expansion of the universe. We first show that the
Tolman-Oppenheimer-Volkoff equation of $f(R)$ theories can be obtained by
thermodynamical method in spherical symmetric spacetime. Then we prove that the
maximum entropy principle is also valid for $f(R)$ gravity in general static
spacetimes beyond spherical symmetry. The result shows that if the constraint
equation is satisfied and the temperature of fluid obeys Tolmans law, the
extrema of total entropy implies other components of gravitational equations.
Conversely, if $f(R)$ gravitational equation hold, the total entropy of the
fluid should be extremum. Our work suggests a general and solid connection
between $f(R)$ gravity and thermodynamics.Comment: 18 pages. arXiv admin note: text overlap with arXiv:1404.6601 by
other author
|
General proof of the entropy principle for self-gravitating fluid in
f(R) Gravity
|
general proof of the entropy principle for self-gravitating fluid in f(r) gravity
|
discussions connection thermodynamics attract recently. gravitating perfect accelerated universe. tolman oppenheimer volkoff thermodynamical spherical spacetime. valid spacetimes spherical symmetry. satisfied obeys tolmans extrema gravitational equations. conversely gravitational hold extremum. connection pages. admin overlap
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non_dup
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[] |
42721795
|
10.1007/JHEP08(2016)164
|
We present the integrand decomposition of multiloop scattering amplitudes in
parallel and orthogonal space-time dimensions, $d=d_\parallel+d_\perp$, being
$d_\parallel$ the dimension of the parallel space spanned by the legs of the
diagrams. When the number $n$ of external legs is $n\le 4$, the corresponding
representation of the multiloop integrals exposes a subset of integration
variables which can be easily integrated away by means of Gegenbauer
polynomials orthogonality condition. By decomposing the integration momenta
along parallel and orthogonal directions, the polynomial division algorithm is
drastically simplified. Moreover, the orthogonality conditions of Gegenbauer
polynomials can be suitably applied to integrate the decomposed integrand,
yielding the systematic annihilation of spurious terms. Consequently, multiloop
amplitudes are expressed in terms of integrals corresponding to irreducible
scalar products of loop momenta and external momenta. We revisit the one-loop
decomposition, which turns out to be controlled by the maximum-cut theorem in
different dimensions, and we discuss the integrand reduction of two-loop planar
and non-planar integrals up to $n=8$ legs, for arbitrary external and internal
kinematics. The proposed algorithm extends to all orders in perturbation
theory.Comment: 64 pages, 4 figures, 8 table
|
Adaptive Integrand Decomposition in parallel and orthogonal space
|
adaptive integrand decomposition in parallel and orthogonal space
|
integrand decomposition multiloop amplitudes orthogonal perp spanned legs diagrams. legs multiloop integrals exposes away gegenbauer polynomials orthogonality condition. decomposing momenta orthogonal directions division drastically simplified. orthogonality gegenbauer polynomials suitably integrate decomposed integrand yielding annihilation spurious terms. multiloop amplitudes integrals irreducible momenta momenta. revisit decomposition turns integrand planar planar integrals legs kinematics. extends orders perturbation pages
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non_dup
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42711981
|
10.1007/JHEP08(2016)165
|
We develop a renormalization method for holographic entanglement entropy
based on area renormalization of entangling surfaces. The renormalized
entanglement entropy is derived for entangling surfaces in asymptotically
locally anti-de Sitter spacetimes in general dimensions and for entangling
surfaces in four dimensional holographic renormalization group flows. The
renormalized entanglement entropy for disk regions in $AdS_4$ spacetimes agrees
precisely with the holographically renormalized action for $AdS_4$ with
spherical slicing and hence with the F quantity, in accordance with the
Casini-Huerta-Myers map. We present a generic class of holographic RG flows
associated with deformations by operators of dimension $3/2 < \Delta < 5/2$ for
which the F quantity increases along the RG flow, hence violating the strong
version of the F theorem. We conclude by explaining how the renormalized
entanglement entropy can be derived directly from the renormalized partition
function using the replica trick i.e. our renormalization method for the
entanglement entropy is inherited directly from that of the partition function.
We show explicitly how the entanglement entropy counterterms can be derived
from the standard holographic renormalization counterterms for asymptotically
locally anti-de Sitter spacetimes.Comment: 44 page
|
Renormalized entanglement entropy
|
renormalized entanglement entropy
|
renormalization holographic entanglement renormalization entangling surfaces. renormalized entanglement entangling asymptotically locally sitter spacetimes entangling holographic renormalization flows. renormalized entanglement spacetimes agrees precisely holographically renormalized spherical slicing quantity accordance casini huerta myers map. generic holographic flows deformations delta quantity violating theorem. explaining renormalized entanglement renormalized partition replica trick i.e. renormalization entanglement inherited partition function. explicitly entanglement counterterms holographic renormalization counterterms asymptotically locally sitter
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non_dup
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[] |
42746871
|
10.1007/JHEP08(2016)166
|
Using an expansion in large number of dimensions, taken to subleading orders,
we discuss several issues concerning the Gregory-Laflamme instabilities. We map
out the phase diagram of neutral and charged black strings, and comment on the
possible transition in the nature of the final state of the instability at
higher order in the 1/D expansion. We also discuss unstable black membranes,
and show that in certain limits the preferred shape of the non-uniform phase is
a triangular lattice.Comment: 20 pages, 4 figures; v3: published versio
|
On Brane Instabilities in the Large $D$ Limit
|
on brane instabilities in the large $d$ limit
|
subleading orders concerning gregory laflamme instabilities. neutral strings comment instability expansion. unstable membranes preferred triangular pages versio
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non_dup
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[] |
42748891
|
10.1007/JHEP08(2016)167
|
We consider the application of twistor theory to five-dimensional anti-de
Sitter space. The twistor space of AdS$_5$ is the same as the ambitwistor space
of the four-dimensional conformal boundary; the geometry of this correspondence
is reviewed for both the bulk and boundary. A Penrose transform allows us to
describe free bulk fields, with or without mass, in terms of data on twistor
space. Explicit representatives for the bulk-to-boundary propagators of scalars
and spinors are constructed, along with twistor action functionals for the free
theories. Evaluating these twistor actions on bulk-to-boundary propagators is
shown to produce the correct two-point functions.Comment: 24 pages, 4 figures. v2: typos fixed, published versio
|
Twistor methods for AdS$_5$
|
twistor methods for ads$_5$
|
twistor sitter space. twistor ambitwistor conformal correspondence reviewed boundary. penrose transform twistor space. representatives propagators scalars spinors twistor functionals theories. evaluating twistor propagators pages figures. typos versio
|
non_dup
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[] |
42732976
|
10.1007/JHEP08(2016)168
|
The addition of supersymmetric Chern-Simons terms to ${\cal N}=8$
super-Yang-Mills theory in three-dimensions is expected to make the latter flow
into infrared superconformal phases. We address this problem holographically by
studying the effect of the Romans mass on the D2-brane near-horizon geometry.
Working in a consistent, effective four-dimensional setting provided by $D=4$
${\cal N}=8$ supergravity with a dyonic $\textrm{ISO(7)}$ gauging, we verify
the existence of a rich web of supersymmetric domain walls triggered by the
Romans mass that interpolate between the (four-dimensional description of the)
D2-brane and various superconformal phases. We also construct domain walls for
which both endpoints are superconformal. While most of our results are
numerical, we provide analytic results for the $\textrm{SU}(3)\times
\textrm{U}(1)$-invariant flow into an ${\cal N}=2$ conformal phase recently
discovered.Comment: 20 pages plus appendices, 5 figures. v2: typos corrected, published
tex
|
Romans-mass-driven flows on the D2-brane
|
romans-mass-driven flows on the d2-brane
|
supersymmetric chern simons super mills infrared superconformal phases. holographically studying romans brane horizon geometry. supergravity dyonic textrm gauging verify supersymmetric walls triggered romans interpolate brane superconformal phases. walls endpoints superconformal. analytic textrm textrm conformal pages appendices figures. typos corrected
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non_dup
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[] |
42715190
|
10.1007/JHEP08(2016)170
|
The global properties of the final states produced in hadronic interactions
of protons at centre-of-mass energies of future hadron colliders (such as
FCC-hh at CERN, and SppC in China), are studied. The predictions of various
Monte Carlo (MC) event generators used in collider physics (PYTHIA 6, PYTHIA 8,
and PHOJET) and in ultrahigh-energy cosmic-rays studies (EPOS, and QGSJET) are
compared. Despite their different underlying modeling of hadronic interactions,
their predictions for proton-proton (p-p) collisions at $\sqrt{s}$ = 100 TeV
are quite similar. The average of all MC predictions (except PHOJET) for the
different observables are: (i) p-p inelastic cross sections $\sigma_{\rm inel}$
= 105 $\pm$ 2 mb; (ii) total charged multiplicity $\rm N_{_{\rm ch}}$ = 150
$\pm$ 20; (iii) charged particle pseudorapidity density at midrapidity $\rm
dN_{ch}/d\eta|_{\eta=0} = 9.6 \pm 0.2$; (iv) energy density at midrapidity $\rm
dE/d\eta|_{\eta=0} = 13.6 \pm 1.5$ GeV, and $\rm dE/d\eta|_{\eta=5} = 670 \pm
70$ GeV at the edge of the central region; and (v) average transverse momenta
at midrapidities $\rm < p_{T}> = 0.76 \pm 0.07$ GeV/c. At midrapidity, EPOS and
QGSJET-II predict larger per-event multiplicity probabilities at very low ($\rm
N_{\rm ch}<3$) and very high ($\rm N_{\rm ch}>100$) particle multiplicities,
whereas PYTHIA 6 and 8 feature higher yields in the intermediate region $\rm
N_{\rm ch}\approx$ 30--80. These results provide useful information for the
estimation of the detector occupancies and energy deposits from pileup
collisions at the expected large FCC-hh/SppC luminosities.Comment: 10 pages, 11 figures. Minor changes. Matches version published in
JHE
|
Global properties of proton-proton collisions at $\sqrt{s}$ = 100 TeV
|
global properties of proton-proton collisions at $\sqrt{s}$ = 100 tev
|
hadronic protons hadron colliders cern sppc studied. monte carlo generators collider pythia pythia phojet ultrahigh cosmic rays epos qgsjet compared. hadronic proton proton collisions sqrt similar. phojet observables inelastic sigma inel multiplicity pseudorapidity midrapidity midrapidity momenta midrapidities midrapidity epos qgsjet predict multiplicity probabilities multiplicities pythia approx occupancies deposits pileup collisions sppc pages figures. minor changes. matches
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non_dup
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[] |
42723863
|
10.1007/JHEP08(2016)171
|
We use effective kinetic theory, accurate at weak coupling, to simulate the
pre-equilibrium evolution of transverse energy and flow perturbations in
heavy-ion collisions. We provide a Green function which propagates the initial
perturbations to the energy-momentum tensor at a time when hydrodynamics
becomes applicable. With this map, the complete pre-thermal evolution from
saturated nuclei to hydrodynamics can be modelled in a perturbatively
controlled way.Comment: 25 pages, 9 figures (prepared for submission to JHEP). Differences
from version 1: updated figures 3(b), 5, 7, 8 and 9, replaced appendix
|
Initial conditions for hydrodynamics from weakly coupled pre-equilibrium
evolution
|
initial conditions for hydrodynamics from weakly coupled pre-equilibrium evolution
|
simulate perturbations collisions. propagates perturbations hydrodynamics applicable. saturated nuclei hydrodynamics modelled perturbatively pages submission jhep updated replaced
|
non_dup
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[] |
29524506
|
10.1007/JHEP08(2016)174
|
We study the conjecture made by Chang, Minwalla, Sharma, and Yin on the
duality between the N=6 Vasiliev higher spin theory on AdS_4 and the N=6
Chern-Simons-matter theory, so-called ABJ theory, with gauge group U(N) x
U(N+M). Building on our earlier results on the ABJ partition function, we
develop the systematic 1/M expansion, corresponding to the weak coupling
expansion in the higher spin theory, and compare the leading 1/M correction,
with our proposed prescription, to the one-loop free energy of the N=6 Vasiliev
theory. We find an agreement between the two sides up to an ambiguity that
appears in the bulk one-loop calculation.Comment: 35 pages, 1 figure. v3: A sign error and the choice of boundary
conditions in the higher spin one-loop calculation have been corrected.
Accordingly, slight changes have been made to the details of the conclusions,
improving the clai
|
ABJ Theory in the Higher Spin Limit
|
abj theory in the higher spin limit
|
conjecture chang minwalla sharma duality vasiliev chern simons partition prescription vasiliev theory. sides ambiguity pages figure. corrected. accordingly slight improving clai
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non_dup
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[] |
42698751
|
10.1007/JHEP08(2016)175
|
We study the $(1,0)$ six-dimensional SCFTs living on defects of non-geometric
heterotic backgrounds (T-fects) preserving a $E_7\times E_8$ subgroup of
$E_8\times E_8$. These configurations can be dualized explicitly to F-theory on
elliptic K3-fibered non-compact Calabi-Yau threefolds. We find that the
majority of the resulting dual threefolds contain non-resolvable singularities.
In those cases in which we can resolve the singularities we explicitly
determine the SCFTs living on the defect. We find a form of duality in which
distinct defects are described by the same IR fixed point. For instance, we
find that a subclass of non-geometric defects are described by the SCFT arising
from small heterotic instantons on ADE singularities.Comment: 68 pages, 6 figure
|
Heterotic T-fects, 6D SCFTs, and F-Theory
|
heterotic t-fects, 6d scfts, and f-theory
|
scfts living defects geometric heterotic backgrounds fects preserving subgroup configurations dualized explicitly elliptic fibered calabi threefolds. majority threefolds resolvable singularities. resolve singularities explicitly scfts living defect. duality defects point. subclass geometric defects scft arising heterotic instantons pages
|
non_dup
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[] |
42744461
|
10.1007/JHEP08(2016)176
|
We define and compute the dressed elliptic genus of N = 2 heterotic
compactifications with torsion that are principal two-torus bundles over a K3
surface. We consider the most general gauge bundle compatible with
supersymmetry, a stable holomorphic vector bundle over the base together with
an Abelian bundle over the total space, generalizing the computation previously
done by the authors in the absence of the latter. Starting from a (0,2) gauged
linear sigma-model with torsion we use supersymmetric localization to obtain
the result. We provide also a mathematical definition of the dressed elliptic
genus as a modified Euler characteristic and prove that both expressions agree
for hypersurfaces in weighted projective spaces. Finally we show that it admits
a natural decomposition in terms of N = 4 superconformal characters, that may
be useful to investigate moonshine phenomena for this wide class of N = 2
vacua, that includes K3*T2 compactifications as special cases.Comment: 36 pages, version published in JHE
|
Dressed elliptic genus of heterotic compactifications with torsion and
general bundles
|
dressed elliptic genus of heterotic compactifications with torsion and general bundles
|
dressed elliptic genus heterotic compactifications torsion principal torus bundles surface. bundle compatible supersymmetry holomorphic bundle abelian bundle generalizing latter. gauged sigma torsion supersymmetric localization result. mathematical dressed elliptic genus euler expressions agree hypersurfaces weighted projective spaces. admits decomposition superconformal characters moonshine phenomena vacua compactifications pages
|
non_dup
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[] |
42684868
|
10.1007/JHEP08(2016)177
|
We investigate the behavior of entanglement entropy at finite temperature and
chemical potential for strongly coupled large-N gauge theories in
$d$-dimensions ($d\ge 3$) that are dual to Anti-de Sitter-Reissner-Nordstrom
geometries in $(d+1)-$dimensions, in the context of gauge-gravity duality. We
develop systematic expansions based on the Ryu-Takayanagi prescription that
enable us to derive analytic expressions for entanglement entropy and mutual
information in different regimes of interest. Consequently, we identify the
specific regions of the bulk geometry that contribute most significantly to the
entanglement entropy of the boundary theory at different limits. We define a
scale, dubbed as the effective temperature, which determines the behavior of
entanglement in different regimes. At high effective temperature, entanglement
entropy is dominated by the thermodynamic entropy, however, mutual information
subtracts out this contribution and measures the actual quantum entanglement.
Finally, we study the entanglement/disentanglement transition of mutual
information in the presence of chemical potential which shows that the quantum
entanglement between two sub-regions decreases with the increase of chemical
potential.Comment: 38 pages, multiple figure
|
Aspects of Holographic Entanglement at Finite Temperature and Chemical
Potential
|
aspects of holographic entanglement at finite temperature and chemical potential
|
entanglement sitter reissner nordstrom geometries duality. expansions takayanagi prescription enable derive analytic expressions entanglement mutual regimes interest. entanglement limits. dubbed determines entanglement regimes. entanglement dominated thermodynamic mutual subtracts entanglement. entanglement disentanglement mutual entanglement pages
|
non_dup
|
[] |
83853700
|
10.1007/JHEP08(2017)002
|
We compute holographic R\'enyi entropies for spherical entangling surfaces on
the boundary while considering third order Lovelock gravity with negative
cosmological constant in the bulk. Our study shows that third order Lovelock
black holes with hyperbolic event horizon are unstable, and at low temperatures
those with smaller mass are favoured, giving rise to first order phase
transitions in the bulk. We determine regions in the Lovelock parameter space
in arbitrary dimensions, where bulk phase transitions happen and where boundary
causality constraints are met. We show that each of these points corresponds to
a dual boundary conformal field theory whose R\'enyi entropy exhibits a kink at
a certain critical index $n$.Comment: 19 pages, 5 figures; published versio
|
Non-analyticity of holographic R\'enyi entropy in Lovelock gravity
|
non-analyticity of holographic r\'enyi entropy in lovelock gravity
|
holographic enyi entropies spherical entangling lovelock cosmological bulk. lovelock holes hyperbolic horizon unstable favoured giving bulk. lovelock happen causality met. conformal enyi exhibits kink .comment pages versio
|
non_dup
|
[] |
132157646
|
10.1007/JHEP08(2017)002.pdf
|
We compute holographic Rényi entropies for spherical entangling surfaces on the boundary while considering third order Lovelock gravity with negative cosmological constant in the bulk. Our study shows that third order Lovelock black holes with hyperbolic event horizon are unstable, and at low temperatures those with smaller mass are favoured, giving rise to first order phase transitions in the bulk. We determine regions in the Lovelock parameter space in arbitrary dimensions, where bulk phase transitions happen and where boundary causality constraints are met. We show that each of these points corresponds to a dual boundary conformal field theory whose Rényi entropy exhibits a kink at a certain critical index n.This research
was supported in part by the Icelandic Research Fund under contracts 163419-051 and
163422-051, and by grants from the University of Iceland Research Fund.Peer Reviewe
|
Non-analyticity of holographic Rényi entropy in Lovelock gravity
|
non-analyticity of holographic rényi entropy in lovelock gravity
|
holographic rényi entropies spherical entangling lovelock cosmological bulk. lovelock holes hyperbolic horizon unstable favoured giving bulk. lovelock happen causality met. conformal rényi exhibits kink n.this icelandic fund contracts grants iceland fund.peer reviewe
|
non_dup
|
[] |
83849327
|
10.1007/JHEP08(2017)003
|
In the so-called (2,2) theory, which is the U(N)^4 circular quiver
superconformal Chern-Simons theory with levels (k,0,-k,0), it was known that
the instanton effects are described by the free energy of topological strings
whose Gopakumar-Vafa invariants coincide with those of the local D_5 del Pezzo
geometry. By considering two types of one-parameter rank deformations U(N) x
U(N+M) x U(N+2M) x U(N+M) and U(N+M) x U(N) x U(N+M) x U(N), we classify the
known diagonal BPS indices by degrees. Together with other two types of
one-parameter deformations, we further propose the topological string
expression when both of the above two deformations are turned on.Comment: 57 pages, 3 eps figures, published version (with data added
|
Instanton Effects in Rank Deformed Superconformal Chern-Simons Theories
from Topological Strings
|
instanton effects in rank deformed superconformal chern-simons theories from topological strings
|
circular quiver superconformal chern simons instanton topological strings gopakumar vafa invariants coincide pezzo geometry. deformations classify diagonal indices degrees. deformations propose topological deformations turned pages
|
non_dup
|
[] |
78507123
|
10.1007/JHEP08(2017)004
|
Building on recent advances in the understanding of gauge-Yukawa theories we
explore possibilities to UV-complete the Standard Model in an asymptotically
safe manner. Minimal extensions are based on a large flavor sector of
additional fermions coupled to a scalar singlet matrix field. We find that
asymptotic safety requires fermions in higher representations of $SU(3)_C\times
SU(2)_L$. Possible signatures at colliders are worked out and include
$R$-hadron searches, diboson signatures and the evolution of the strong and
weak coupling constants.Comment: 52 pages, 23 figures, 7 tables, published version. v2: clarifications
and results (weak sector, Fig 18) added, some plots updated post-Moriond
2017, typos remove
|
Directions for model building from asymptotic safety
|
directions for model building from asymptotic safety
|
advances yukawa explore possibilities asymptotically safe manner. extensions flavor fermions singlet field. asymptotic fermions representations signatures colliders worked hadron searches diboson signatures pages tables version. clarifications plots updated moriond typos remove
|
non_dup
|
[] |
73991149
|
10.1007/JHEP08(2017)005
|
For models with several Higgs doublets we present an alternative method to
the one proposed by Branco, Gerard and Grimus, in 1984, to check whether or not
CP is spontaneously violated in the Higgs potential. The previous method is
powerful and rigorous. It requires the identification of a matrix $U$
corresponding to a symmetry of the Lagrangian and verifying a simple relation
involving the vacuum expectation values. The nonexistence of such a matrix
signals spontaneous CP violation. However, as the number of Higgs doublets
increases, finding such a matrix $U$ may not be straightforward and it may turn
out to be easier to analyse the potential by going to the so-called Higgs
basis. The transformation to the Higgs basis is straightforward once the vacuum
expectation values are known. The method proposed in this work is also powerful
and rigorous and can be particularly useful to analyse models with more than
two Higgs doublets and with continuous symmetries.Comment: 9 pages, no figures. v2: minor changes, matching JHEP versio
|
A Simple Method to detect spontaneous CP Violation in multi-Higgs models
|
a simple method to detect spontaneous cp violation in multi-higgs models
|
doublets branco gerard grimus check spontaneously violated potential. powerful rigorous. lagrangian verifying involving expectation values. nonexistence spontaneous violation. doublets straightforward easier analyse going basis. straightforward expectation known. powerful rigorous analyse doublets pages figures. minor matching jhep versio
|
non_dup
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[] |
83846432
|
10.1007/JHEP08(2017)007
|
We construct two new SL(2,Z) invariant vacua of type IIB string theory which
are bound states of $(p,q)$ strings with $(m,n)$ 5-branes, written as ((F, D1),
(NS5, D5)) and preserve 1/4 of the full space-time supersymmetries. For the
first case, the strings live inside the 5-brane world-volume and in the second
case the strings are perpendicular to the 5-brane world-volume. In the first
case, naively one would expect an attractive interaction between the strings
and the 5-branes due to attractive force between F and D5 and also between D1
and NS5. We find that 1/4 BPS bound state exists only when the vacuum moduli
satisfy certain condition which is found to be consistent with the no-force
condition between the branes. No such complication arises for the second case.
The tension formulae and the various other descendant states which can be
obtained by the application of T-duality for both these bound states are
discussed.Comment: 22 pages, 1 table, minor changes and one reference added, the version
to appear in JHE
|
On 1/4 BPS ((F, D1), (NS5, D5)) bound states of type IIB string theory
|
on 1/4 bps ((f, d1), (ns5, d5)) bound states of type iib string theory
|
vacua strings branes preserve supersymmetries. strings live brane strings perpendicular brane volume. naively attractive strings branes attractive moduli satisfy branes. complication arises case. tension formulae descendant duality pages minor
|
non_dup
|
[] |
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