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33615991
|
10.1007/JHEP07(2014)103
|
The first observation of the Cabibbo-suppressed decay $\Lambda_b^0\rightarrow J/\psi p \pi^-$ is reported using a data sample of proton-proton collisions at 7 and 8 TeV, corresponding to an integrated luminosity of 3 $\rm fb^{-1}$. A prominent signal is observed and the branching fraction relative to the decay mode $\Lambda_b^0\rightarrow J/\psi p K^-$ is determined to be $$ \frac{{\cal B}(\Lambda_b^0\rightarrow J/\psi p \pi^-)}{{\cal B}(\Lambda_b^0\rightarrow J/\psi p K^-)}=0.0824\pm0.0025\:(\text{stat})\pm0.0042\:(\text{syst}). $$ A search for direct CP violation is performed. The difference in the CP asymmetries between these two decays is found to be $$ {\cal A}_{CP}(\Lambda_b^0\rightarrow J/\psi p \pi^-)-{\cal A}_{CP}(\Lambda_b^0\rightarrow J/\psi p K^-)=(+5.7\pm 2.4\:(\text{stat})\pm1.2\:(\text{syst}))\%, $$ which is compatible with CP symmetry at the $2.2\sigma$ level
|
Observation of the $\Lambda_b^0\rightarrow J/\psi p \pi^-$ decay
|
observation of the $\lambda_b^0\rightarrow j/\psi p \pi^-$ decay
|
cabibbo suppressed lambda rightarrow proton proton collisions luminosity prominent branching lambda rightarrow frac lambda rightarrow lambda rightarrow stat syst violation performed. asymmetries decays lambda rightarrow lambda rightarrow stat syst compatible sigma
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non_dup
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[] |
35083138
|
10.1007/JHEP07(2014)106
|
We study the bound states of heavy-light quark-antiquark system in the relativistic potential model, where the potential includes the long-distance confinement term, the short-distance Coulomb term and spin-dependent term. The spectrum of B , B * , D , D * and states with higher orbital quantum numbers are obtained. Compared with previous results predicted in the relativistic potential model, the predictions are improved and extended in this work, more theoretical masses are predicted which can be tested in experiment in the future
|
Spectrum of the charmed and b-flavored mesons in the relativistic potential model
|
spectrum of the charmed and b-flavored mesons in the relativistic potential model
|
antiquark relativistic confinement coulomb term. orbital obtained. relativistic
|
non_dup
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[] |
35083131
|
10.1007/JHEP07(2014)126
|
Localization of supersymmetric N $$ \mathcal{N} $$ = 2 Chern-Simons-Matter theory on a squashed S 3 with SU(2) × U(1) isometry has been studied by different groups of authors. In this paper, we localize the theory on a squashed S 3 with SU(2) × U(1) isometry and a class of complex background. We see that certain kinds of shifts of the background gauge fields are crucial in obtaining nontrivial results, and the previously found results on this manifold can be incorporated in our results as special limits
|
Localization of supersymmetric Chern-Simons-Matter theory on a squashed S 3 with SU(2) × U(1) isometry
|
localization of supersymmetric chern-simons-matter theory on a squashed s 3 with su(2) × u(1) isometry
|
localization supersymmetric mathcal chern simons squashed isometry authors. localize squashed isometry background. kinds shifts crucial obtaining nontrivial manifold incorporated
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non_dup
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[] |
24990127
|
10.1007/JHEP07(2014)131
|
We study probe M5-branes in N=1 AdS5 solutions of M-theory that arise from
M5-branes wrapped on a Riemann surface. Using the BPS condition from
kappa-symmetry, we classify supersymmetric probe M5-branes that extend along
all of AdS5 and intersect the Riemann surface at points. These can be viewed as
punctures in the dual N=1 superconformal field theories. We find M5-branes that
correspond to the two types of simple punctures previously studied in field
theory. In addition, when the central charge is rational, we find a new class
of M5-branes with a moduli space that includes two internal dimensions in
addition to the Riemann surface. These new M5-branes have the essential
characteristic of fractional branes, in that a single one at a generic point of
its moduli space becomes multiple M5-branes at special points.Comment: 29 pages, 9 figure
|
Punctures from Probe M5-Branes and N=1 Superconformal Field Theories
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punctures from probe m5-branes and n=1 superconformal field theories
|
branes arise branes wrapped riemann surface. kappa classify supersymmetric branes extend intersect riemann points. viewed punctures superconformal theories. branes punctures theory. rational branes moduli riemann surface. branes fractional branes generic moduli branes pages
|
non_dup
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[] |
25009030
|
10.1007/JHEP07(2014)135
|
Triggered by ongoing experimental analyses, we report on a study of the cross
section ratio sigma(pp -> ttbb)/sigma(pp -> ttjj) at the next-to-leading order
in QCD, focusing on both present and future collider energies: sqrt{s}= 7, 8,
13 TeV. In particular, we provide a comparison between our predictions and the
currently available CMS data for the 8 TeV run. We further analyse the
kinematics and scale uncertainties of the two processes for a single set of
parton distribution functions, with the goal of assessing possible correlations
that might help to reduce the theoretical error of the ratio and thus enhance
the predictive power of this observable. We argue that the different jet
kinematics makes the ttbb and ttjj processes uncorrelated in several
observables, and show that the scale uncertainty is not significantly reduced
when taking the ratio of the cross sections.Comment: 23 pages, 10 figures, 3 tables, some issues clarified,
acknowledgement and references added, version to appear in JHE
|
On the ratio of ttbb and ttjj cross sections at the CERN Large Hadron
Collider
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on the ratio of ttbb and ttjj cross sections at the cern large hadron collider
|
triggered ongoing sigma ttbb sigma ttjj focusing collider sqrt tev. run. analyse kinematics parton goal assessing enhance predictive observable. argue kinematics ttbb ttjj uncorrelated observables pages tables clarified acknowledgement
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non_dup
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[] |
35083109
|
10.1007/JHEP07(2014)137
|
Three dimensional field theories admit disorder line operators, dubbed vortex loop operators. They are defined by the path integral in the presence of prescribed singularities along the defect line. We study half-BPS vortex loop operators for N $$ \mathcal{N} $$ = 2 supersymmetric theories on S $$ \mathbb{S} $$ 3 , its deformation S b 3 $$ {\mathbb{S}}_b^3 $$ and S $$ \mathbb{S} $$ 1 × S $$ \mathbb{S} $$ 2 . We construct BPS vortex loops defined by the path integral with a fixed gauge or flavor holonomy for infinitesimal curves linking the loop. It is also possible to include a singular profile for matter fields. For vortex loops defined by holonomy, we perform supersymmetric localization by calculating the fluctuation modes, or alternatively by applying the index theory for transversally elliptic operators. We clarify how the latter method works in situations without fixed points of relevant isometries. Abelian mirror symmetry transforms Wilson and vortex loops in a specific way. In particular an ordinary Wilson loop transforms into a vortex loop for a flavor symmetry. Our localization results confirm the predictions of abelian mirror symmetry
|
Exact results for vortex loop operators in 3d supersymmetric theories
|
exact results for vortex loop operators in 3d supersymmetric theories
|
admit disorder dubbed vortex operators. prescribed singularities defect line. vortex mathcal supersymmetric mathbb deformation mathbb mathbb mathbb vortex loops flavor holonomy infinitesimal linking loop. singular fields. vortex loops holonomy supersymmetric localization calculating fluctuation alternatively transversally elliptic operators. clarify situations isometries. abelian mirror transforms wilson vortex loops way. ordinary wilson transforms vortex flavor symmetry. localization confirm abelian mirror
|
non_dup
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[] |
25022954
|
10.1007/JHEP07(2014)138
|
It is shown how tree-level multi-gluon helicity amplitudes with an arbitrary
number of off-shell external gluons can be calculated via BCFW recursion.
Compact expressions for helicity amplitudes for scattering processes of three
and four gluons, with up to three of them off-shell, are presented. Also,
maximum-helicity-violating configurations are identified for up to two
off-shell gluons, and the expressions for their helicity amplitudes for an
arbitrary number of on-shell gluons are derived.Comment: 24 pages, report number correcte
|
BCFW recursion for off-shell gluons
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bcfw recursion for off-shell gluons
|
gluon helicity amplitudes gluons bcfw recursion. expressions helicity amplitudes gluons presented. helicity violating configurations gluons expressions helicity amplitudes gluons pages correcte
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non_dup
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[] |
33617398
|
10.1007/JHEP07(2014)140
|
Decays of the form $B^{0}_{(s)}\rightarrow J/\psi K_{{\rm S}}^{0} h^+ h^{\left(\prime\right) -}$ ($h^{(\prime)} = K, \pi$) are searched for in proton-proton collision data corresponding to an integrated luminosity of $1.0 \, {\rm fb}^{-1}$ recorded with the LHCb detector. The first observation of the $B^{0}_{s}\rightarrow J/\psi K_{{\rm S}}^{0} K^{\pm} \pi^{\mp}$ decay is reported, with significance in excess of 10 standard deviations. The $B^{0}\rightarrow J/\psi K_{{\rm S}}^{0} K^{+} K^{-}$ decay is also observed for the first time. The branching fraction of $B^{0}\rightarrow J/\psi K_{{\rm S}}^{0} \pi^{+} \pi^{-}$ is determined, to significantly better precision than previous measurements, using $B^0 \rightarrow J/\psi K_{{\rm S}}^{0}$ as a normalisation channel. Branching fractions and upper limits of the other $B^{0}_{(s)}\rightarrow J/\psi K_{{\rm S}}^{0} h^+ h^{\left(\prime\right) -}$ modes are determined relative to that of the $B^{0}\rightarrow J/\psi K_{{\rm S}}^{0} \pi^{+} \pi^{-}$ decay
|
Observation of the $B^{0}_{s}\rightarrow J/\psi K_{{\rm S}}^{0} K^{\pm} \pi^{\mp}$ decay
|
observation of the $b^{0}_{s}\rightarrow j/\psi k_{{\rm s}}^{0} k^{\pm} \pi^{\mp}$ decay
|
decays rightarrow prime prime searched proton proton collision luminosity lhcb detector. rightarrow excess deviations. rightarrow time. branching rightarrow precision rightarrow normalisation channel. branching fractions rightarrow prime rightarrow
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non_dup
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[] |
35083107
|
10.1007/JHEP07(2014)142
|
We propose a model independent approach for the analysis of interference effects in the process of QCD pair production of new heavy quarks of different species that decay into Standard Model particles, including decays via flavour changing neutral currents. By adopting as ansatz a simple analytical formula we show that one can accurately describe the interference between two different such particle pairs leading to the same final state using information about masses, total widths and couplings. A study of the effects on differential distributions is also performed showing that, when interference plays a relevant role, the distributions of the full process can be obtained by a simple rescaling of the distributions of either quark contributing to the interference term. We also present the range of validity of the analytical expression that we have found
|
Towards model-independent approach to the analysis of interference effects in pair production of new heavy quarks
|
towards model-independent approach to the analysis of interference effects in pair production of new heavy quarks
|
propose interference quarks decays flavour changing neutral currents. adopting ansatz accurately interference widths couplings. interference plays rescaling contributing interference term. validity
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non_dup
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[] |
35083088
|
10.1007/JHEP07(2014)149
|
In this work we study the γγ → W L + W L − and γγ → Z L Z L scattering processes within the effective chiral Lagrangian approach, including a light Higgs-like scalar as a dynamical field together with the would-be-Goldstone bosons w ± and z associated to the electroweak symmetry breaking. This approach is inspired by the possibility that the Higgs-like boson be a composite particle behaving as another Goldstone boson, and assumes the existence of a mass gap between m h , m W , m Z and the potential new emergent resonances, setting an intermediate energy region (above m h , W , Z and below the resonance masses) where the use of these effective chiral Lagrangians are the most appropriate tools to compute the relevant observables. We analyse in detail the proper chiral counting rules for the present case of photon-photon scattering and provide the computation of the one-loop γγ → W L + W L − and γγ → Z L Z L scattering amplitudes within this Effective Chiral Lagrangian approach and the Equivalence Theorem, including a discussion on the involved renormalization procedure. We also propose here a joint analysis of our results for the twophoton scattering amplitudes together with other photonic processes and electroweak (EW) precision observables for a future comparison with data. This could help to disentangle the nature of the light Higgs-like particle
|
One-loop γγ → W L + W L − and γγ → Z L Z L from the Electroweak Chiral Lagrangian with a light Higgs-like scalar
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one-loop γγ → w l + w l − and γγ → z l z l from the electroweak chiral lagrangian with a light higgs-like scalar
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chiral lagrangian goldstone bosons electroweak breaking. inspired boson composite behaving goldstone boson assumes emergent resonances chiral lagrangians observables. analyse proper chiral counting amplitudes chiral lagrangian equivalence renormalization procedure. propose twophoton amplitudes photonic electroweak precision observables data. disentangle
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non_dup
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[] |
25025474
|
10.1007/JHEP07(2014)157
|
In three dimensions, a free, periodic scalar field is related by duality to
an abelian gauge field. Here I explore aspects of this duality when both
theories are quantized on a Riemann surface of genus g. At higher genus,
duality involves an identification of winding with momentum on the Jacobian
variety of the Riemann surface. I also consider duality for monopole and loop
operators on the surface and exhibit the operator algebra, a refinement of the
Wilson-'t Hooft algebra.Comment: 53 pages, 1 figure, v2: references adde
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Abelian Duality at Higher Genus
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abelian duality at higher genus
|
duality abelian field. explore duality quantized riemann genus genus duality involves winding jacobian riemann surface. duality monopole exhibit refinement wilson hooft pages adde
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non_dup
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[] |
29518971
|
10.1007/JHEP07(2015)006
|
We consider the equilibrium partition function of an ideal gas of Dirac
fermions minimally coupled to torsion in $2+1$ dimensions. We show that the
energy-momentum tensor reproduces the Hall viscosity and other parity violating
terms of first order in the torsion. We also consider the modifications of the
constitutive relations, and classify the corresponding susceptibilities. An
entropy current consistent with zero production of entropy in equilibrium is
constructed.Comment: 13 pages; v2: improved discussion in sections 3 and 5, references
added, matches the journal versio
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Torsional response of relativistic fermions in $2+1$ dimensions
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torsional response of relativistic fermions in $2+1$ dimensions
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partition ideal dirac fermions minimally torsion dimensions. reproduces hall viscosity parity violating torsion. modifications constitutive classify susceptibilities. pages matches versio
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non_dup
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[] |
39317210
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10.1007/JHEP07(2015)037
|
The solvability of the three-dimensional O(N) scalar field theory in the large N limit makes it an ideal toy model exhibiting “walking” behavior, expected in some SU(N) gauge theories with a large number of fermion flavors. We study the model using lattice regularization and show that when the ratio of the particle mass to an effective 4-point coupling (with dimension mass) is small, the beta function associated to the running 4-point coupling is “walking”. We also study lattice artifacts and finite size effects, and find that while the former can be sizable at realistic correlation length, the latter are under control already at lattice sizes a few (∼3) correlation lengths. We show the robustness of the walking phenomenon by showing that it can also be observed by studying physical observables such as the scattering phase shifts and the mass gap in finite volume
|
Walking in the 3-dimensional large N scalar model
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walking in the 3-dimensional large n scalar model
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solvability ideal exhibiting “walking” fermion flavors. regularization beta running “walking”. artifacts former sizable realistic sizes lengths. robustness walking phenomenon studying observables shifts
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non_dup
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[] |
35086258
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10.1007/JHEP07(2015)039
|
We build models where Dark Matter candidates arise as composite states of a new confining gauge force, stable thanks to accidental symmetries. Restricting to renormalizable theories compatible with SU(5) unification, we find 13 models based on SU( N ) gauge theories and 9 based on SO( N ). We also describe other models that require non-renormalizable interactions. The two gauge groups lead to distinctive phenomenologies: SU( N ) theories give complex DM, with potentially observable electric and magnetic dipole moments that lead to peculiar spin-independent cross sections; SO( N ) theories give real DM, with challenging spin-dependent cross sections or inelastic scatterings. Models with Yukawa couplings also give rise to spin-independent direct detection mediated by the Higgs boson and to electric dipole moments for the electron. In some models DM has higher spin. Each model predicts a specific set of lighter composite scalars, possibly observable at colliders
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Accidental composite dark matter
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accidental composite dark matter
|
build candidates arise composite confining thanks accidental symmetries. restricting renormalizable compatible unification renormalizable interactions. distinctive phenomenologies potentially observable dipole moments peculiar challenging inelastic scatterings. yukawa couplings boson dipole moments electron. spin. predicts lighter composite scalars possibly observable colliders
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non_dup
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[] |
35086259
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10.1007/JHEP07(2015)053
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Using a holographic method, we further investigate the relaxation towards the hydrodynamic regime of a boost-invariant non-Abelian plasma taken out-of-equilibrium. In the dual description, the system is driven out-of-equilibrium by boundary sourcing, a deformation of the boundary metric, as proposed by Chesler and Yaffe. The effects of several deformation profiles on the bulk geometry are investigated by the analysis of the corresponding solutions of the Einstein equations. The time of restoration of the hydrodynamic regime is investigated: setting the effective temperature of the system at the end of the boundary quenching to T eff ( τ * ) = 500 MeV, the hydrodynamic regime is reached after a lapse of time of O $$ \mathcal{O} $$ (1 fm/c)
|
On thermalization of a boost-invariant non-Abelian plasma
|
on thermalization of a boost-invariant non-abelian plasma
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holographic relaxation hydrodynamic boost abelian equilibrium. sourcing deformation chesler yaffe. deformation einstein equations. restoration hydrodynamic quenching hydrodynamic reached lapse mathcal
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non_dup
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[] |
144256185
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10.1007/JHEP07(2015)054
|
We consider N=2 supersymmetric gauge theories on four manifolds admitting an isometry. Generalized Killing spinor equations are derived from the consistency of supersymmetry algebrae and solved in the case of four manifolds admitting a U(1) isometry. This is used to explicitly compute the supersymmetric path integral on S2× S2 via equivariant localization. The building blocks of the resulting partition function are shown to contain the three point functions and the conformal blocks of Liouville Gravity
|
N=2 supersymmetric gauge theories on S2×S2 and Liouville Gravity
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n=2 supersymmetric gauge theories on s2×s2 and liouville gravity
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supersymmetric manifolds admitting isometry. killing spinor consistency supersymmetry algebrae solved manifolds admitting isometry. explicitly supersymmetric equivariant localization. blocks partition conformal blocks liouville
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non_dup
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[] |
29535643
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10.1007/JHEP07(2015)057
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We present a procedure to improve the lattice definition of $\mathcal N = 4$
supersymmetric Yang--Mills theory. The lattice construction necessarily
involves U(1) flat directions, and we show how these can be lifted without
violating the exact lattice supersymmetry. The basic idea is to modify the
equations of motion of an auxiliary field, which determine the moduli space of
the system. Applied to numerical calculations, the resulting improved lattice
action leads to dramatically reduced violations of supersymmetric Ward
identities and much more rapid approach to the continuum limit
|
Lifting flat directions in lattice supersymmetry
|
lifting flat directions in lattice supersymmetry
|
mathcal supersymmetric mills theory. necessarily involves directions lifted violating supersymmetry. modify auxiliary moduli system. dramatically violations supersymmetric ward identities continuum
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non_dup
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[] |
29530447
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10.1007/JHEP07(2015)058
|
In this paper, we extensively investigate the new algorithm known as the
multi-step BCFW recursion relations. Many interesting mathematical properties
are found and understanding these aspects, one can find a systematic way to
complete the calculation of amplitude after finite, definite steps and get the
correct answer, without recourse to any specific knowledge from field theories,
besides mass dimension and helicities. This process consists of the pole
concentration and inconsistency elimination. Terms that survive inconsistency
elimination cannot be determined by the new algorithm. They include polynomials
and their generalizations, which turn out to be useful objects to be explored.
Afterwards, we apply it to the Standard Model plus gravity to illustrate its
power and limitation. Ensuring its workability, we also tentatively discuss how
to improve its efficiency by reducing the steps.Comment: 38 pages, 13 figures, 3 appendice
|
On Multi-step BCFW Recursion Relations
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on multi-step bcfw recursion relations
|
extensively bcfw recursion relations. mathematical definite answer recourse besides helicities. pole inconsistency elimination. survive inconsistency elimination algorithm. polynomials generalizations explored. afterwards illustrate limitation. ensuring workability tentatively reducing pages appendice
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non_dup
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29522061
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10.1007/JHEP07(2015)059
|
We compute the contribution of the vacuum Virasoro representation to the
genus-two partition function of an arbitrary CFT with central charge $c>1$.
This is the perturbative pure gravity partition function in three dimensions.
We employ a sewing construction, in which the partition function is expressed
as a sum of sphere four-point functions of Virasoro vacuum descendants. For
this purpose, we develop techniques to efficiently compute correlation
functions of holomorphic operators, which by crossing symmetry are determined
exactly by a finite number of OPE coefficients; this is an analytic
implementation of the conformal bootstrap. Expanding the results in $1/c$,
corresponding to the semiclassical bulk gravity expansion, we find
that---unlike at genus one---the result does not truncate at finite loop order.
Our results also allow us to extend earlier work on multiple-interval Renyi
entropies and on the partition function in the separating degeneration limit.Comment: 63 pages + ref
|
Renyi Entropies, the Analytic Bootstrap, and 3D Quantum Gravity at
Higher Genus
|
renyi entropies, the analytic bootstrap, and 3d quantum gravity at higher genus
|
virasoro genus partition perturbative partition dimensions. employ sewing partition sphere virasoro descendants. efficiently holomorphic crossing analytic conformal bootstrap. expanding semiclassical unlike genus truncate order. extend renyi entropies partition separating degeneration pages
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non_dup
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[] |
35086230
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10.1007/JHEP07(2015)065
|
We compute the 1-loop correction to the electroweak observables from spin-1 resonances in SO(5)/SO(4) composite Higgs models. The strong dynamics is modeled with an effective description comprising the Nambu-Goldstone bosons and the lowest-lying spin-1 resonances. A classification is performed of the relevant operators including custodially-breaking effects from the gauging of hypercharge. The 1-loop contribution of the resonances is extracted in a diagrammatic approach by matching to the low-energy theory of Nambu-Goldstone bosons. We find that the correction is numerically important in a significant fraction of the parameter space and tends to weaken the bounds providing a negative shift to the S parameter
|
One-loop effects from spin-1 resonances in Composite Higgs models
|
one-loop effects from spin-1 resonances in composite higgs models
|
electroweak observables resonances composite models. modeled comprising nambu goldstone bosons lying resonances. custodially breaking gauging hypercharge. resonances diagrammatic matching nambu goldstone bosons. numerically tends weaken bounds
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non_dup
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[] |
35086227
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10.1007/JHEP07(2015)068
|
We study globally supersymmetric 3d gauge theories on curved manifolds by describing the coupling of 3d topological gauge theories, with both Yang-Mills and Chern-Simons terms in the action, to background topological gravity. In our approach, the Seifert condition for manifolds supporting global supersymmetry is elegantly deduced from the BRST transformations of topological gravity. A cohomological characterization of the geometrical moduli which affect the partition function is obtained. In the Seifert context the Chern-Simons topological (framing) anomaly is BRST trivial. We compute explicitly the corresponding local Wess-Zumino functional. As an application, we obtain the dependence on the Seifert moduli of the partition function of 3d supersymmetric gauge theory on the squashed sphere by solving the anomalous topological Ward identities, in a regularization independent way and without the need of evaluating any functional determinant
|
Topological anomalies for Seifert 3-manifolds
|
topological anomalies for seifert 3-manifolds
|
globally supersymmetric curved manifolds describing topological mills chern simons topological gravity. seifert manifolds supporting supersymmetry elegantly deduced brst transformations topological gravity. cohomological geometrical moduli partition obtained. seifert chern simons topological framing anomaly brst trivial. explicitly wess zumino functional. seifert moduli partition supersymmetric squashed sphere solving anomalous topological ward identities regularization evaluating determinant
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non_dup
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35086166
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10.1007/JHEP07(2015)076
|
We find new classes of AdS 4 solutions with localized branes and orientifolds, both analytic and numerical. We start with an Ansatz for the pure spinors inspired by a recently found class of AdS 7 × M 3 solutions in massive IIA; we replace the AdS 7 by AdS 4 × Σ 3 , and we fibre M 3 over Σ 3 in a way inspired by a field theory SU(2) twist. We are able to reduce the problem to a system of five ODEs; a further Ansatz reduces them to three. Their solutions can be bijectively mapped to the AdS 7 solutions via a simple universal map. This also allows to find a simple analytic form for these solutions. They are naturally interpreted as twisted compactifications of the (1, 0) CFT 6 ’s dual to the AdS 7 solutions. The larger system of five ODEs also admits more general numerical solutions, again with localized branes; regularity is achieved via an attractor mechanism
|
AdS 4 compactifications of AdS 7 solutions in type II supergravity
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ads 4 compactifications of ads 7 solutions in type ii supergravity
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localized branes orientifolds analytic numerical. ansatz spinors inspired massive replace fibre inspired twist. odes ansatz reduces three. bijectively mapped universal map. analytic solutions. naturally interpreted twisted compactifications solutions. odes admits localized branes regularity attractor
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non_dup
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29538025
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10.1007/JHEP07(2015)077
|
We investigate the thermodynamic behaviour of AdS quasitopological black hole
solutions in the context of extended thermodynamic phase space, in which the
cosmological constant induces a pressure with a conjugate volume. We find that
the third order exact quasitopological solution exhibits features consistent
with the third order Lovelock solutions for positive quasitopological coupling,
including multiple reentrant phase transitions and isolated critical points.
For negative coupling we find the first instances of both reentrant phase
transitions and thermodynamic singularities in five dimensions, along with
other modified thermodynamic behaviour compared to Einstein-AdS-Gauss Bonnet
gravity.Comment: 20 pages, 15 figures, REVTeX 4-1; updated to match published versio
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P-V Criticality in Quasitopological Gravity
|
p-v criticality in quasitopological gravity
|
thermodynamic quasitopological thermodynamic cosmological induces conjugate volume. quasitopological exhibits lovelock quasitopological reentrant points. instances reentrant thermodynamic singularities thermodynamic einstein gauss bonnet pages revtex updated match versio
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non_dup
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29531791
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10.1007/JHEP07(2015)078
|
Most extreme-mass-ratio-inspirals of small compact objects into supermassive
black holes end with a fast plunge from an eccentric last stable orbit. For
rapidly rotating black holes such fast plunges may be studied in the context of
the Kerr/CFT correspondence because they occur in the near-horizon region where
dynamics are governed by the infinite dimensional conformal symmetry. In this
paper we use conformal transformations to analytically solve for the radiation
emitted from fast plunges into near-extreme Kerr black holes. We find perfect
agreement between the gravity and CFT computations.Comment: 16 pages, 2 figure
|
Fast plunges into Kerr black holes
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fast plunges into kerr black holes
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extreme inspirals supermassive holes plunge eccentric orbit. rapidly rotating holes plunges kerr correspondence horizon governed infinite conformal symmetry. conformal transformations analytically solve emitted plunges extreme kerr holes. perfect pages
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non_dup
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29535063
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10.1007/JHEP07(2015)083
|
We further develop the formalism for taking position-space cuts of eikonal
diagrams introduced in [Phys.Rev.Lett. 114 (2015), no. 18 181602,
arXiv:1410.5681]. These cuts are applied directly to the position-space
representation of any such diagram and compute its discontinuity to the leading
order in the dimensional regulator. We provide algorithms for computing the
position-space cuts and apply them to several two- and three-loop eikonal
diagrams, finding agreement with results previously obtained in the literature.
We discuss a non-trivial interplay between the cutting prescription and
non-Abelian exponentiation. We furthermore discuss the relation of the
imaginary part of the cusp anomalous dimension to the static interquark
potential.Comment: 39+18 pages, 16 figures; elaborated the discussion of the comparison
of numerical and analytic results for the three-gluon vertex diagram in the
caption of fig. 16; version to be published in JHE
|
Position-space cuts for Wilson line correlators
|
position-space cuts for wilson line correlators
|
formalism cuts eikonal diagrams phys.rev.lett. cuts discontinuity regulator. cuts eikonal diagrams literature. trivial interplay cutting prescription abelian exponentiation. imaginary cusp anomalous interquark pages elaborated analytic gluon caption fig.
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non_dup
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33640019
|
10.1007/JHEP07(2015)085
|
We consider the production of $W\gamma$ and $Z\gamma$ pairs at hadron colliders. We report on the complete fully differential computation of radiative corrections at next-to-next-to-leading order (NNLO) in QCD perturbation theory. The calculation includes the leptonic decay of the vector boson with the corresponding spin correlations, off shell effects and final-state photon radiation. We present numerical results for $pp$ collisions at 7 and 8 TeV and we compare them with available LHC data. In the case of $Z\gamma$ production, the impact of NNLO corrections is generally moderate, ranging from 8% to 18%, depending on the applied cuts. In the case of $W\gamma$ production, the NNLO effects are more important, and range from 19% to 26%, thereby improving the agreement of the theoretical predictions with the data. As expected, the impact of QCD radiative corrections is significantly reduced when a jet veto is applied
|
$W\gamma$ and $Z\gamma$ production at the LHC in NNLO QCD
|
$w\gamma$ and $z\gamma$ production at the lhc in nnlo qcd
|
gamma gamma hadron colliders. radiative nnlo perturbation theory. leptonic boson radiation. collisions data. gamma nnlo moderate ranging cuts. gamma nnlo thereby improving data. radiative veto
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non_dup
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[] |
34084271
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10.1007/JHEP07(2015)086
|
Many searches for physics beyond the Standard Model at the Large Hadron Collider (LHC) rely on top tagging algorithms, which discriminate between boosted hadronic top quarks and the much more common jets initiated by light quarks and gluons. We note that the hadronic calorimeter (HCAL) effectively takes a “digital image” of each jet, with pixel intensities given by energy deposits in individual HCAL cells. Viewed in this way, top tagging becomes a canonical pattern recognition problem. With this motivation, we present a novel top tagging algorithm based on an Artificial Neural Network (ANN), one of the most popular approaches to pattern recognition. The ANN is trained on a large sample of boosted tops and light quark/gluon jets, and is then applied to independent test samples. The ANN tagger demonstrated excellent performance in a Monte Carlo study: for example, for jets with pT in the 1100-1200 GeV range, 60% top-tag efficiency can be achieved with a 4% mis-tag rate. We discuss the physical features of the jets identified by the ANN tagger as the most important for classification, as well as correlations between the ANN tagger and some of the familiar top-tagging observables and algorithm
|
Playing tag with ANN: boosted top identification with pattern recognition
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playing tag with ann: boosted top identification with pattern recognition
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searches hadron collider rely tagging discriminate boosted hadronic quarks jets initiated quarks gluons. hadronic calorimeter hcal effectively “digital image” pixel intensities deposits hcal cells. viewed tagging canonical recognition problem. motivation tagging artificial popular recognition. trained boosted tops gluon jets samples. tagger excellent monte carlo jets rate. jets tagger tagger familiar tagging observables
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non_dup
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29520866
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10.1007/JHEP07(2015)089
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We consider dark sector particles (DSPs) that obtain sizeable interactions
with Standard Model fermions from a new mediator. While these particles can
avoid observation in direct detection experiments, they are strongly
constrained by LHC measurements. We demonstrate that there is an important
complementarity between searches for DSP production and searches for the
mediator itself, in particular bounds on (broad) dijet resonances. This
observation is crucial not only in the case where the DSP is all of the dark
matter but whenever - precisely due to its sizeable interactions with the
visible sector - the DSP annihilates away so efficiently that it only forms a
dark matter subcomponent. To highlight the different roles of DSP direct
detection and LHC monojet and dijet searches, as well as perturbativity
constraints, we first analyse the exemplary case of an axial-vector mediator
and then generalise our results. We find important implications for the
interpretation of LHC dark matter searches in terms of simplified models.Comment: 30 pages, 14 figures. v2: discussion of total ttbar cross section
added, matches published versio
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Constraining Dark Sectors with Monojets and Dijets
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constraining dark sectors with monojets and dijets
|
dsps sizeable fermions mediator. avoid constrained measurements. complementarity searches searches mediator bounds broad dijet resonances. crucial whenever precisely sizeable visible annihilates away efficiently subcomponent. highlight roles monojet dijet searches perturbativity analyse exemplary axial mediator generalise results. searches simplified pages figures. ttbar matches versio
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non_dup
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35088788
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10.1007/JHEP07(2015)095
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We investigate the tree-level S-matrix in gauge theories and open superstring theory with several soft particles. We show that scattering amplitudes with two or three soft gluons of non-identical helicities behave universally in the limit, with multi-soft factors which are not the product of individual soft gluon factors. The results are obtained from the BCFW recursion relations in four dimensions, and further extended to arbitrary dimensions using the CHY formula. We also find new soft theorems for double soft limits of scalars and fermions in N = 4 $$ \mathcal{N}=4 $$ and pure N = 2 $$ \mathcal{N}=2 $$ SYM. Finally, we show that the double-soft-scalar theorems can be extended to open superstring theory without receiving any α ′ corrections
|
Double soft theorems in gauge and string theories
|
double soft theorems in gauge and string theories
|
superstring particles. amplitudes gluons helicities behave universally gluon factors. bcfw recursion formula. theorems scalars fermions mathcal mathcal sym. theorems superstring receiving
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non_dup
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161409192
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10.1007/JHEP07(2015)096
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The ATLAS detector data on di-lepton production is used in order to impose constraints on Z' boson masses associated with a variety of 3-3-1 and E_6 motivated Z'\ud
models. Lower mass bounds for the different models are established at 95% confidenc level. Our numerical analysis is extrapolated up to 14 TeV, and further to 30 TeV and\ud
100 TeV, for a broad range of luminosities. Some of our results can be compared with the ATLAS published bounds, being, for those cases, in fairly good agreement. We also report the vector and axial charges for all the 3-3-1-motivated Z' models without exotic electric charges for leptons, known in the literature. To the best of our knowledge most of this charges were not reported before
|
LHC constraints on 3-3-1 models
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lhc constraints on 3-3-1 models
|
atlas lepton impose boson motivated models. bounds confidenc level. extrapolated broad luminosities. atlas bounds fairly agreement. axial charges motivated exotic charges leptons literature. charges
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non_dup
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87082466
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10.1007/JHEP07(2015)099
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Journal of High Energy Physics 2015.7 (2015): 099 reproduced by permission of Scuola Internazionale Superiore di Studi Avanzati (SISSA)We construct a simple explicit local geometry providing a ‘bifid throat’ for 5-brane axion monodromy. A bifid throat is a throat that splits into two daughter throats in the IR, containing a homologous 2-cycle family reaching down into each daughter throat. Our example consists of a deformed ℤ3 × ℤ2 orbifold of the conifold, which provides us with an explicit holographic dual of the bifid throat including D3-branes and fractional 5-branes at the toric singularities of our setup. Having the holographic description in terms of the dual gauge theory allows us to address the effect of 5-brane-antibrane pair backreaction including the warping effects. This leads to the size of the backreaction being small and controllable after imposing proper normalization of the inflaton potential and hence the warping scalesAR and AU are partially supported by the grants FPA2012-32828 from the MINECO, the ERC Advanced Grant SPLE under contract ERC-2012-ADG-20120216-320421 and the grant SEV-2012-0249 of the “Centro de Excelencia Severo Ochoa” Programme. AW is supported by the Impuls und Vernetzungsfond of the Helmholtz Association of German Research Centers under grant HZ-NG-60
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Bifid throats for axion monodromy inflation
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bifid throats for axion monodromy inflation
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reproduced permission scuola internazionale superiore studi avanzati sissa ‘bifid throat’ brane axion monodromy. bifid throat throat splits daughter throats homologous reaching daughter throat. deformed orbifold conifold holographic bifid throat branes fractional branes toric singularities setup. holographic brane antibrane backreaction warping effects. backreaction controllable imposing proper normalization inflaton warping scalesar partially grants mineco advanced sple contract “centro excelencia severo ochoa” programme. impuls vernetzungsfond helmholtz german centers
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35088776
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10.1007/JHEP07(2015)100
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We estimate the reach of the 14 TeV LHC and future hadronic and leptonic colliders in the parameter space of the minimal composite Higgs model, outlining the complementarity of direct resonance searches and indirect information from the measurements of the Higgs boson couplings. The reach on electroweak charged spin-one resonances, taken here as representative direct signatures, is obtained from the current 8 TeV LHC limits by an extrapolation procedure which we outline and validate. The impact of electroweak precision tests, and their possible improvement at future colliders, is also quantified
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Future tests of Higgs compositeness: direct vs indirect
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future tests of higgs compositeness: direct vs indirect
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hadronic leptonic colliders composite outlining complementarity searches indirect boson couplings. electroweak resonances signatures extrapolation outline validate. electroweak precision colliders quantified
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non_dup
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35088787
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10.1007/JHEP07(2015)102
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Inspired by a recently conjectured universal bound for thermo-electric diffusion constants in quantum critical, strongly coupled systems and relying on holographic analytical computations, we investigate the possibility of formulating Planckian bounds in different holographic models featuring momentum dissipation. For a certain family of solutions to a simple massive gravity dilaton model at zero charge density we find linear in temperature resistivity and entropy density alongside a constant electric susceptibility. In addition we explicitly find that the sum of the thermo-electric diffusion constants is bounded
|
Bounds on charge and heat diffusivities in momentum dissipating holography
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bounds on charge and heat diffusivities in momentum dissipating holography
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inspired conjectured universal thermo relying holographic computations formulating planckian bounds holographic featuring dissipation. massive dilaton resistivity alongside susceptibility. explicitly thermo
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non_dup
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29533869
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10.1007/JHEP07(2015)108
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The decays $B_d^0\rightarrow D_d^-D_d^+$ and $B_s^0\rightarrow D_s^-D_s^+$
probe the CP-violating mixing phases $\phi_d$ and $\phi_s$, respectively. The
theoretical uncertainty of the corresponding determinations is limited by
contributions from penguin topologies, which can be included with the help of
the $U$-spin symmetry of the strong interaction. We analyse the currently
available data for $B^0_{d,s}\rightarrow D_{d,s}^-D_{d,s}^+$ decays and those
with similar dynamics to constrain the involved non-perturbative parameters.
Using further information from semileptonic $B_d^0\rightarrow
D_d^-\ell^+\nu_{\ell}$ decays, we perform a test of the factorisation
approximation and take non-factorisable $SU(3)$-breaking corrections into
account. The branching ratios of the $B_d^0\rightarrow D_d^-D_d^+$,
$B_s^0\rightarrow D_s^-D_d^+$ and $B_s^0\rightarrow D_s^-D_s^+$,
$B_d^0\rightarrow D_d^-D_s^+$ decays show an interesting pattern which can be
accommodated through significantly enhanced exchange and penguin annihilation
topologies. This feature is also supported by data for the $B_s^0\rightarrow
D_d^-D_d^+$ channel. Moreover, there are indications of potentially enhanced
penguin contributions in the $B_d^0\rightarrow D_d^-D_d^+$ and
$B_s^0\rightarrow D_s^-D_s^+$ decays, which would make it mandatory to control
these effects in the future measurements of $\phi_d$ and $\phi_s$. We discuss
scenarios for high-precision measurements in the era of Belle II and the LHCb
upgrade.Comment: 47 pages, 17 figures, matching published versio
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Anatomy of $B\rightarrow D\bar{D}$ Decays
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anatomy of $b\rightarrow d\bar{d}$ decays
|
decays rightarrow rightarrow violating respectively. determinations penguin topologies interaction. analyse rightarrow decays constrain perturbative parameters. semileptonic rightarrow decays factorisation factorisable breaking account. branching rightarrow rightarrow rightarrow rightarrow decays accommodated penguin annihilation topologies. rightarrow channel. indications potentially penguin rightarrow rightarrow decays mandatory scenarios precision belle lhcb pages matching versio
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non_dup
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29524512
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10.1007/JHEP07(2015)109
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Many knots and links in S^3 can be drawn as gluing of three manifolds with
one or more four-punctured S^2 boundaries. We call these knot diagrams as
double fat graphs whose invariants involve only the knowledge of the fusion and
the braiding matrices of four-strand braids. Incorporating the properties of
four-point conformal blocks in WZNW models, we conjecture colored HOMFLY
polynomials for these double fat graphs where the color can be rectangular or
non-rectangular representation. With the recent work of Gu-Jockers, the fusion
matrices for the non-rectangular [21] representation, the first which involves
multiplicity is known. We verify our conjecture by comparing with the [21]
colored HOMFLY of many knots, obtained as closure of three braids. The
conjectured form is computationally very effective leading to writing
[21]-colored HOMFLY polynomials for many pretzel type knots and non-pretzel
type knots. In particular, we find class of pretzel mutants which are
distinguished and another class of mutants which cannot be distinguished by
[21] representation. The difference between the [21]-colored HOMFLY of two
mutants seems to have a general form, with A-dependence completely defined by
the old conjecture due to Morton and Cromwell. In particular, we check it for
an entire multi-parametric family of mutant knots evaluated using evolution
method.Comment: 38 pages + 18 pages (Appendix with tables and [21]-colored HOMFLY
polynomials
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Colored HOMFLY polynomials of knots presented as double fat diagrams
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colored homfly polynomials of knots presented as double fat diagrams
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knots links drawn gluing manifolds punctured boundaries. call knot diagrams invariants involve fusion braiding strand braids. incorporating conformal blocks wznw conjecture colored homfly polynomials rectangular rectangular representation. jockers fusion rectangular involves multiplicity known. verify conjecture colored homfly knots closure braids. conjectured computationally writing colored homfly polynomials pretzel knots pretzel knots. pretzel mutants distinguished mutants distinguished representation. colored homfly mutants conjecture morton cromwell. check parametric knots pages pages tables colored homfly polynomials
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non_dup
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29514634
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10.1007/JHEP07(2015)113
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Di Pietro and Komargodski have recently demonstrated a four-dimensional
counterpart of Cardy's formula, which gives the leading high-temperature
($\beta\rightarrow{0}$) behavior of supersymmetric partition functions
$Z^{SUSY}(\beta)$. Focusing on superconformal theories, we elaborate on the
subleading contributions to their formula when applied to free chiral and U(1)
vector multiplets. In particular, we see that the high-temperature expansion of
$\ln Z^{SUSY}(\beta)$ terminates at order $\beta^0$. We also demonstrate how
their formula must be modified when applied to SU($N$) toric quiver gauge
theories in the planar ($N\rightarrow\infty$) limit. Our method for
regularizing the one-loop determinants of chiral and vector multiplets helps to
clarify the relation between the 4d $\mathcal{N} = 1$ superconformal index and
its corresponding supersymmetric partition function obtained by
path-integration.Comment: 15 pages plus appendices; v2: minor modifications and a "Note added";
v3: presentation improved and minor errors in app B correcte
|
High-Temperature Expansion of Supersymmetric Partition Functions
|
high-temperature expansion of supersymmetric partition functions
|
pietro komargodski counterpart cardy beta rightarrow supersymmetric partition susy beta focusing superconformal elaborate subleading chiral multiplets. susy beta terminates beta toric quiver planar rightarrow infty limit. regularizing determinants chiral multiplets helps clarify mathcal superconformal supersymmetric partition pages appendices minor modifications presentation minor correcte
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non_dup
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78063463
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10.1007/JHEP07(2015)114
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We develop the generalized Cartan Calculus for the groups G = SL(2,R) × R[superscript +],SL(5,R) and SO(5, 5). They are the underlying algebraic structures of d = 9, 7, 6 exceptional field theory, respectively. These algebraic identities are needed for the “tensor hierarchy” structure in exceptional field theory. The validity of Poincaré lemmas in this new differential geometry is also discussed. Finally we explore some possible extension of the generalized Cartan calculus beyond the exceptional series.United States. Dept. of Energy (Grant Contract DE-SC00012567
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Generalized Cartan Calculus in general dimension
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generalized cartan calculus in general dimension
|
cartan calculus superscript algebraic exceptional respectively. algebraic identities “tensor hierarchy” exceptional theory. validity poincaré lemmas discussed. explore cartan calculus exceptional series.united states. dept. contract
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non_dup
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29522098
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10.1007/JHEP07(2015)116
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Using holography, we study the evolution of a spatially homogeneous, far from
equilibrium, strongly coupled N=4 supersymmetric Yang-Mills plasma with a
non-zero charge density or a background magnetic field. This gauge theory
problem corresponds, in the dual gravity description, to an initial value
problem in Einstein-Maxwell theory with homogeneous but anisotropic initial
conditions. We explore the dependence of the equilibration process on different
aspects of the initial departure from equilibrium and, while controlling for
these dependencies, examine how the equilibration dynamics are affected by the
presence of a non-vanishing charge density or an external magnetic field. The
equilibration dynamics are remarkably insensitive to the addition of even large
chemical potentials or magnetic fields; the equilibration time is set primarily
by the form of the initial departure from equilibrium. For initial deviations
from equilibrium which are well localized in scale, we formulate a simple model
for equilibration times which agrees quite well with our results.Comment: 54 pages, 18 figures, published version, ref. update
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Far-from-equilibrium dynamics of a strongly coupled non-Abelian plasma
with non-zero charge density or external magnetic field
|
far-from-equilibrium dynamics of a strongly coupled non-abelian plasma with non-zero charge density or external magnetic field
|
holography spatially homogeneous supersymmetric mills field. einstein maxwell homogeneous anisotropic conditions. explore equilibration departure controlling dependencies examine equilibration vanishing field. equilibration remarkably insensitive potentials equilibration primarily departure equilibrium. deviations localized formulate equilibration agrees pages ref. update
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non_dup
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74354441
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10.1007/JHEP07(2015)117
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Journal of High Energy Physics 2015.7 (2015): 117 reproduced by permission of Scuola Internazionale Superiore di Studi Avanzati (SISSA)We study the magnetoconductivity induced by the axial anomaly via the chiral magnetic effect in strongly coupled holographic models. An important ingredient in our models is that the axial charge is non-conserved beyond the axial anomaly. We achieve this either by explicit symmetry breaking via a non-vanishing non-normalisable mode of an axially charged scalar or using a Stückelberg field to make the AdS-bulk gauge field massive. The DC magnetoconductivites can be calculated analytically. They take a universal form in terms of gauge field mass at the horizon and quadratic dependence on the magnetic field. The axial charge relaxation time grows linearly with magnetic field in the large B regime. Most strikingly positive magnetoconductivity is still present even when the relaxation times are short τ5 ≈ 1/(πT) and the axial charge can not be thought of as an approximate symmetry. In the U(1)A explicit breaking model, we also observe that the chiral separation conductivity and the axial magnetic conductivity for the consistent axial current vanish in the limit of strong symmetry breakingThis work was supported in part by the Spanish MINECO’s “Centro de Excelencia Severo Ochoa” Programme under grant SEV-2012-024
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Anomalous magnetoconductivity and relaxation times in holography
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anomalous magnetoconductivity and relaxation times in holography
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reproduced permission scuola internazionale superiore studi avanzati sissa magnetoconductivity axial anomaly chiral holographic models. ingredient axial conserved axial anomaly. breaking vanishing normalisable axially stückelberg massive. magnetoconductivites analytically. universal horizon quadratic field. axial relaxation grows linearly regime. strikingly magnetoconductivity relaxation axial thought approximate symmetry. breaking chiral conductivity axial conductivity axial vanish breakingthis spanish mineco’s “centro excelencia severo ochoa” programme
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non_dup
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29522028
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10.1007/JHEP07(2015)118
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We analyse effective potential around the electroweak (EW) scale in the
Standard Model extended with a heavy scalar doublet. We show that the
additional scalars can have a strong impact on vacuum stability. Although the
additional heavy scalars may improve the behaviour of running Higgs
self-coupling at large field values, we prove that they can destabilise the
vacuum due to EW-scale effects. A new EW symmetry conserving minimum of the
effective potential can appear rendering the electroweak symmetry breaking
minimum meta- or unstable. However, for the case of the inert doublet model
(IDM) with a 125 GeV Higgs boson we demonstrate that the parameter space region
where the vacuum is meta- or unstable cannot be reconciled with the constraints
from perturbative unitarity, electroweak precision tests and dark matter relic
abundance measurements.Comment: 15 pages, 4 figures, v2: references added, discussion extended (one
figure added), results unchanged, matches published versio
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Inert scalars and vacuum metastability around the electroweak scale
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inert scalars and vacuum metastability around the electroweak scale
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analyse electroweak doublet. scalars stability. scalars running destabilise effects. conserving rendering electroweak breaking meta unstable. inert doublet boson meta unstable reconciled perturbative unitarity electroweak precision relic abundance pages unchanged matches versio
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non_dup
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29508923
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10.1007/JHEP07(2015)120
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In this paper we would like to demonstrate how the known rules of anyon
condensation motivated physically proposed by Bais \textit{et al} can be
recovered by the mathematics of twist-free commutative separable Frobenius
algebra (CSFA). In some simple cases, those physical rules are also sufficient
conditions defining a twist-free CSFA. This allows us to make use of the
generalized $ADE$ classification of CSFA's and modular invariants to classify
anyon condensation, and thus characterizing all gapped domain walls and gapped
boundaries of a large class of topological orders. In fact, this classification
is equivalent to the classification we proposed in Ref.1.Comment: 9+6 pages, 1 figure, 3 tables, minor corrections, references adde
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Generalized ADE Classification of Gapped Domain Walls
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generalized ade classification of gapped domain walls
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anyon condensation motivated physically bais textit recovered mathematics twist commutative separable frobenius csfa defining twist csfa. csfa modular invariants classify anyon condensation characterizing gapped walls gapped boundaries topological orders. pages tables minor adde
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non_dup
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29540889
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10.1007/JHEP07(2015)121
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In this paper, based on the holographic techniques, we explore the
hydrodynamics of charge diffusion phenomena in non commutative $ \mathcal{N}=4
$ SYM plasma at strong coupling. In our analysis, we compute the $ R $ charge
diffusion rates both along commutative as well as the non commutative
coordinates of the brane. It turns out that unlike the case for the shear
viscosity, the DC conductivity along the non commutative direction of the brane
differs significantly from that of its cousin corresponding to the commutative
direction of the brane. Such a discrepancy however smoothly goes away in the
limit of the vanishing non commutativity.Comment: Latex, 11 pages, Version to appear in JHE
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Holographic charge transport in non commutative gauge theories
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holographic charge transport in non commutative gauge theories
|
holographic explore hydrodynamics phenomena commutative mathcal coupling. commutative commutative brane. turns unlike viscosity conductivity commutative brane differs cousin commutative brane. discrepancy smoothly goes away vanishing latex pages
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non_dup
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25044468
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10.1007/JHEP07(2015)126
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We perform a numerical simulation of the evolution of inhomogeneities with
transverse profile in a collision of gravitational shockwaves in asymptotically
anti-de Sitter spacetime. This constitutes a step closer towards an accurate
holographic description of the thermalization of a strongly coupled plasma,
which can model the dynamics of heavy ion collisions. The results indicate that
the considered inhomogeneities typically become hydrodynamical earlier or at
the same moment when hydrodynamics applies to the background, even though they
decay slowly.Comment: 11 pages, 4 figures; added figure and new results. Mathematica
notebooks can be found at http://users.physics.uoc.gr/~fernandez/Page5.htm
|
Towards Collisions of Inhomogeneous Shockwaves in AdS
|
towards collisions of inhomogeneous shockwaves in ads
|
inhomogeneities collision gravitational shockwaves asymptotically sitter spacetime. constitutes closer holographic thermalization collisions. inhomogeneities hydrodynamical moment hydrodynamics applies pages results. mathematica notebooks users.physics.uoc.gr fernandez .htm
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non_dup
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29526066
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10.1007/JHEP07(2015)136
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We glue four refined topological vertices to obtain the building block of 5D
$U(2)$ quiver instanton partition functions. We take the 4D limit of the result
to obtain the building block of 4D instanton partition functions which, using
the AGT correspondence, are identified with Virasoro conformal blocks.
We show that there is a choice of the parameters of the topological vertices
that we start with, as well as the parameters and the intermediate states
involved in the gluing procedure, such that we obtain Virasoro minimal model
conformal blocks.Comment: 23 pages, improved the presentation, added introductory material, et
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From topological strings to minimal models
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from topological strings to minimal models
|
glue refined topological quiver instanton partition functions. instanton partition correspondence virasoro conformal blocks. topological gluing virasoro conformal pages presentation introductory
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non_dup
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35088750
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10.1007/JHEP07(2015)141
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Heavy quark parton distribution functions (PDFs) play an important role in several Standard Model and New Physics processes. Most analyses rely on the assumption that the charm and bottom PDFs are generated perturbatively by gluon splitting and do not involve any non-perturbative degrees of freedom. It is clearly necessary to test this hypothesis with suitable QCD processes. Conversely, a non-perturbative, intrinsic heavy quark parton distribution has been predicted in the literature. We demonstrate that to a very good approximation the scale-evolution of the intrinsic heavy quark content of the nucleon is governed by non-singlet evolution equations. This allows us to analyze the intrinsic heavy quark distributions without having to resort to a full-fledged global analysis of parton distribution functions. We exploit this freedom to model intrinsic bottom distributions which are so far missing in the literature in order to estimate the impact of this non-perturbative contribution to the bottom-quark PDF, and on parton-parton luminosities at the LHC. This technique can be applied to the case of intrinsic charm, albeit within the limitations outlined in the following
|
On the intrinsic bottom content of the nucleon and its impact on heavy new physics at the LHC
|
on the intrinsic bottom content of the nucleon and its impact on heavy new physics at the lhc
|
parton pdfs processes. rely charm pdfs perturbatively gluon splitting involve perturbative freedom. processes. conversely perturbative intrinsic parton literature. intrinsic nucleon governed singlet equations. analyze intrinsic resort fledged parton functions. exploit freedom intrinsic missing perturbative parton parton luminosities lhc. intrinsic charm albeit limitations outlined
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non_dup
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35088748
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10.1007/JHEP07(2015)142
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In view of recent experimental indications of violations of Lepton Flavor Universality (LFU) in B decays, we analyze constraints and implications of LFU interactions, both using an effective theory approach, and an explicit dynamical model. We show that a simple dynamical model based on a SU(2) L triplet of massive vector bosons, coupled predominantly to third generation fermions (both quarks and leptons), can significantly improve the description of present data. In particular, the model decreases the tension between data and SM predictions concerning: i) the breaking of τ - μ universality in B → D (*) ℓν decays; ii) the breaking of μ - e universality in B → Kℓ + ℓ − decays. Indirectly, the model might also decrease the discrepancy between exclusive and inclusive determinations of | V cb | and | V ub |. The minimal version of the model is in tension with ATLAS and CMS direct searches for the new massive vectors (decaying into τ + τ − pairs), but this tension can be decreased with additional non-standard degrees of freedom. Further pre-dictions of the model both at low- and high-energies, in view of future high-statistics data, are discussed
|
On the breaking of lepton flavor universality in B decays
|
on the breaking of lepton flavor universality in b decays
|
indications violations lepton flavor universality decays analyze model. triplet massive bosons predominantly fermions quarks leptons data. tension concerning breaking universality decays breaking universality decays. indirectly discrepancy exclusive inclusive determinations tension atlas searches massive decaying tension freedom. dictions
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non_dup
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29531602
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10.1007/JHEP07(2015)155
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Recently it has been established that torsional Newton-Cartan (TNC) geometry
is the appropriate geometrical framework to which non-relativistic field
theories couple. We show that when these geometries are made dynamical they
give rise to Horava-Lifshitz (HL) gravity. Projectable HL gravity corresponds
to dynamical Newton-Cartan (NC) geometry without torsion and non-projectable HL
gravity corresponds to dynamical NC geometry with twistless torsion
(hypersurface orthogonal foliation). We build a precise dictionary relating all
fields (including the scalar khronon), their transformations and other
properties in both HL gravity and dynamical TNC geometry. We use TNC invariance
to construct the effective action for dynamical twistless torsional
Newton-Cartan geometries in 2+1 dimensions for dynamical exponent 1<z\le 2 and
demonstrate that this exactly agrees with the most general forms of the HL
actions constructed in the literature. Further, we identify the origin of the
U(1) symmetry observed by Horava and Melby-Thompson as coming from the Bargmann
extension of the local Galilean algebra that acts on the tangent space to TNC
geometries. We argue that TNC geometry, which is manifestly diffeomorphism
covariant, is a natural geometrical framework underlying HL gravity and discuss
some of its implications.Comment: 48 page
|
Horava-Lifshitz Gravity From Dynamical Newton-Cartan Geometry
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horava-lifshitz gravity from dynamical newton-cartan geometry
|
torsional newton cartan geometrical relativistic couple. geometries horava lifshitz gravity. projectable newton cartan torsion projectable twistless torsion hypersurface orthogonal foliation build precise dictionary relating khronon transformations geometry. invariance twistless torsional newton cartan geometries exponent agrees literature. horava melby thompson coming bargmann galilean acts tangent geometries. argue manifestly diffeomorphism covariant geometrical
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non_dup
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35088692
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10.1007/JHEP07(2015)159
|
We present the state-of-the-art of the effective field theory computation of the MSSM Higgs mass, improving the existing ones by including extra threshold corrections. We show that, with this approach, the theoretical uncertainty is within 1 GeV in most of the relevant parameter space. We confirm the smaller value of the Higgs mass found in the EFT computations, which implies a slightly heavier SUSY scale. We study the large tan β region, finding that sbottom thresholds might relax the upper bound on the scale of SUSY. We present SusyHD, a fast computer code that computes the Higgs mass and its uncertainty for any SUSY scale, from the TeV to the Planck scale, even in Split SUSY, both in the D R ¯ $$ \overline{\mathrm{DR}} $$ and in the on-shell schemes. Finally, we apply our results to derive bounds on some well motivated SUSY models, in particular we show how the value of the Higgs mass allows to determine the complete spectrum in minimal gauge mediation
|
Higgs mass determination in supersymmetry
|
higgs mass determination in supersymmetry
|
mssm improving extra corrections. space. confirm computations heavier susy scale. sbottom thresholds relax susy. susyhd computes susy planck split susy overline mathrm schemes. derive bounds motivated susy mediation
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non_dup
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35088657
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10.1007/JHEP07(2015)175
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A consistent framework for studying Standard Model deviations is developed. It assumes that New Physics becomes relevant at some scale beyond the present experimental reach and uses the Effective Field Theory approach by adding higher-dimensional operators to the Standard Model Lagrangian and by computing relevant processes at the next-to-leading order, extending the original κ -framework. The generalized κ -framework provides a useful technical tool to decompose amplitudes at NLO accuracy into a sum of well defined gauge-invariant sub components
|
NLO Higgs effective field theory and κ-framework
|
nlo higgs effective field theory and κ-framework
|
studying deviations developed. assumes adding lagrangian extending framework. decompose amplitudes
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non_dup
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42735202
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10.1007/JHEP07(2016)001
|
We discuss homogeneous baryonic matter in the decompactified limit of the
Sakai-Sugimoto model, improving existing approximations based on flat-space
instantons. We allow for an anisotropic deformation of the instantons in the
holographic and spatial directions and for a density-dependent distribution of
arbitrarily many instanton layers in the bulk. Within our approximation, the
baryon onset turns out to be a second-order phase transition, at odds with
nature, and there is no transition to quark matter at high densities, at odds
with expectations from QCD. This changes when we impose certain constraints on
the shape of single instantons, motivated by known features of holographic
baryons in the vacuum. Then, a first-order baryon onset and chiral restoration
at high density are possible, and at sufficiently large densities two instanton
layers are formed dynamically. Our results are a further step towards
describing realistic, strongly interacting matter over a large density regime
within a single model, desirable for studies of compact stars.Comment: 37 pages, 7 figures, v2: two panels added to fig. 5, version to
appear in JHE
|
Layers of deformed instantons in holographic baryonic matter
|
layers of deformed instantons in holographic baryonic matter
|
homogeneous baryonic decompactified sakai sugimoto improving approximations instantons. anisotropic deformation instantons holographic directions arbitrarily instanton bulk. baryon onset turns odds densities odds expectations qcd. impose instantons motivated holographic baryons vacuum. baryon onset chiral restoration sufficiently densities instanton dynamically. describing realistic interacting desirable pages panels fig.
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non_dup
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[] |
42676409
|
10.1007/JHEP07(2016)002
|
We present a version of the twin Higgs mechanism with vector-like top
partners. In this setup all gauge anomalies automatically cancel, even without
twin leptons. The matter content of the most minimal twin sector is therefore
just two twin tops and one twin bottom. The LHC phenomenology, illustrated with
two example models, is dominated by twin glueball decays, possibly in
association with Higgs bosons. We further construct an explicit
four-dimensional UV completion and discuss a variety of UV completions relevant
for both vector-like and fraternal twin Higgs models.Comment: 39 pages; v2 published versio
|
The Vector-like Twin Higgs
|
the vector-like twin higgs
|
twin partners. setup anomalies automatically cancel twin leptons. twin twin tops twin bottom. phenomenology illustrated dominated twin glueball decays possibly bosons. completion completions fraternal twin pages versio
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non_dup
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[] |
42649076
|
10.1007/JHEP07(2016)005
|
We study global symmetry groups of six-dimensional superconformal field
theories (SCFTs). In the Coulomb branch we use field theoretical arguments to
predict an upper bound for the global symmetry of the SCFT. We then analyze
global symmetry groups of F-theory constructions of SCFTs with a
one-dimensional Coulomb branch. While in the vast majority of cases, all of the
global symmetries allowed by our Coulomb branch analysis can be realized in
F-theory, in a handful of cases we find that F-theory models fail to realize
the full symmetry of the theory on the Coulomb branch. In one particularly
mysterious case, F-theory models realize several distinct maximal subgroups of
the predicted group, but not the predicted group itself.Comment: 47 pages; v2: typos corrected, added the case su(6)* to the analysis
of section 5 and section 6.1. v3: references added, minor changes, published
versio
|
On the global symmetries of 6D superconformal field theories
|
on the global symmetries of 6d superconformal field theories
|
superconformal scfts coulomb branch arguments predict scft. analyze constructions scfts coulomb branch. vast majority symmetries coulomb branch realized handful fail realize coulomb branch. mysterious realize maximal subgroups pages typos corrected minor versio
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non_dup
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[] |
42658589
|
10.1007/JHEP07(2016)006
|
In this paper we propose the identification in AdS4 N = 2 gauged supergravity
of the coefficient $\tau_{RR}$ of 3D N = 2 SCFTs. We constraint the structure
of this function in supergravity by combining the results from unitarity,
holography and localization. We show that our conjectured function is minimized
by the exact R-charge, corresponding to a gravitational attractor for the
scalars in the special geometry. We identify this mechanism with the
supergravity dual of the $\tau_{RR}$-minimization. We check this proposal in
the ABJM model, comparing with the expectations from localization and the
AdS/CFT duality. We comment also on some possible relations with the black hole
microstate counting, recently obtained from the application of localization
techniques.Comment: 19 page
|
3D $\tau_{RR}$-minimization in AdS$_4$ gauged supergravity
|
3d $\tau_{rr}$-minimization in ads$_4$ gauged supergravity
|
propose gauged supergravity scfts. supergravity combining unitarity holography localization. conjectured minimized gravitational attractor scalars geometry. supergravity minimization. check proposal abjm expectations localization duality. comment microstate counting localization
|
non_dup
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[] |
42693018
|
10.1007/JHEP07(2016)007
|
We discuss large $N$ rules of the Sachdev-Ye-Kitaev model and the bi-local
representation of holography of this theory. This is done by establishing $1/N$
Feynman rules in terms of bi-local propagators and vertices, which can be
evaluated following the recent procedure of Polchinski and Rosenhaus. These
rules can be interpreted as Witten type diagrams of the dual AdS theory, which
we are able to define at IR fixed point and off.Comment: 25 pages, 6 figures; v2: minor corrections, typos corrected and
references added; v3: typos corrected and references added; v4: improved
discussion of AdS bulk interpretation; v5: improved discussion of zero mode
and reference added; v6: improved discussion of zero mode, references added,
version to appear in JHEP; v7: reference adde
|
Bi-Local Holography in the SYK Model
|
bi-local holography in the syk model
|
sachdev kitaev holography theory. establishing feynman propagators polchinski rosenhaus. interpreted witten diagrams pages minor typos corrected typos corrected jhep adde
|
non_dup
|
[] |
42707803
|
10.1007/JHEP07(2016)008
|
This work considers an extension of the Standard Model (SM) Higgs sector by a
real, scalar singlet field, including applicability to a dark matter (DM) model
with the addition of a Yukawa coupling to a Dirac fermion. The collider
signatures and constraints on the mixed two-Higgs scenario are determined,
including limits from Higgs production signals and exclusion searches, as well
as constraints arising from the Higgs total and invisible widths. As there is
overwhelming Higgs data which is consistent with a SM scenario, the case in
which an additional scalar has evaded detection is further explored in the
context of Higgs precision measurement. The discovery reach and prospective
signatures of the model at a proposed linear collider are investigated, with
particular focus on the Higgs triple coupling, and di-Higgs production
processes.Comment: v2: Added references, revised description in Section 2, and small
revisions to select figures; v3: Minor typographical corrections, published
versio
|
Collider Constraints and Prospects of a Scalar Singlet Extension to
Higgs Portal Dark Matter
|
collider constraints and prospects of a scalar singlet extension to higgs portal dark matter
|
considers singlet applicability yukawa dirac fermion. collider signatures exclusion searches arising invisible widths. overwhelming evaded explored precision measurement. discovery prospective signatures collider triple revised revisions select minor typographical versio
|
non_dup
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[] |
42688681
|
10.1007/JHEP07(2016)011
|
Given an accelerator-based neutrino experiment with the beam energy E
\lesssim 1 GeV, we expand the probabilities of \nu_\mu \to \nu_e and \overline
{\nu}_\mu \to \overline {\nu}_e oscillations in matter in terms of two small
quantities \Delta_{21}/\Delta_{31} and A/\Delta_{31}, where \Delta_{21} \equiv
m^2_2 - m^2_1 and \Delta_{31} \equiv m^2_3 - m^2_1 are the neutrino
mass-squared differences, and A measures the strength of terrestrial matter
effects. Our analytical approximations are numerically more accurate than those
made by Freund in this energy region, and thus they are particularly applicable
for the study of leptonic CP violation in the low-energy MOMENT, ESS\nuSM and
T2K oscillation experiments. As a by-product, the new analytical approximations
help us to easily understand why the matter-corrected Jarlskog parameter
\widetilde{\cal J} peaks at the resonance energy E_* \simeq 0.14 GeV (or 0.12
GeV) for the normal (or inverted) neutrino mass hierarchy, and how the three
Dirac unitarity triangles are deformed due to the terrestrial matter
contamination. We also affirm that a medium-baseline neutrino oscillation
experiment with the beam energy E lying in the E_* \lesssim E \lesssim 2 E_*
range is capable of exploring leptonic CP violation with little matter-induced
suppression.Comment: 36 pages, 11 figures. A crucial mistake removed, highlights changed,
and a comparison with Freund's result mad
|
Analytical approximations for matter effects on CP violation in the
accelerator-based neutrino oscillations with E \lesssim 1 GeV
|
analytical approximations for matter effects on cp violation in the accelerator-based neutrino oscillations with e \lesssim 1 gev
|
accelerator lesssim expand probabilities overline overline oscillations quantities delta delta delta delta equiv delta equiv squared terrestrial effects. approximations numerically freund applicable leptonic violation moment nusm oscillation experiments. approximations corrected jarlskog widetilde simeq inverted hierarchy dirac unitarity triangles deformed terrestrial contamination. affirm oscillation lying lesssim lesssim capable exploring leptonic violation pages figures. crucial mistake removed highlights changed freund
|
non_dup
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[] |
29571623
|
10.1007/JHEP07(2016)012
|
In this note we consider ${\cal N}=4$ SYM theories in 2+1 dimensions with
gauge group $U(N)\times U(M)$ and $k$ hypermultiplets charged under the $U(N)$.
When $k > 2(N-M)$, the theory flows to a superconformal fixed point in the IR.
Theories with $k <2(N-M)$, on the other hand, flows to strong coupling. We
explore these theories from the perspective of gravity dual. We find that the
gravity duals of theories with $k < (N-M)$ contain enhancons even in situations
where repulson singularities are absent. We argue that supergravity description
is unreliable in the region near these enhancon points. Instead, we show how to
construct reliable sugra duals to particular points on the Coulomb branch where
the enhancon is screened. We explore how these singularities reappear as one
moves around in Coulomb branch and comment on possible field theory
interpretation of this phenomenon. In analyzing gauge/gravity duality for these
models, we encountered one unexpected surprise, that the condition for the
supergravity solution to be reliable and supersymmetric is somewhat weaker than
the expectation from field theory. We also discuss similar issues for theories
with $k=0$.Comment: 31 pages, 12 figure
|
Dynamics of ${\cal N}=4$ supersymmetric field theories in 2+1 dimensions
and their gravity dual
|
dynamics of ${\cal n}=4$ supersymmetric field theories in 2+1 dimensions and their gravity dual
|
hypermultiplets flows superconformal flows coupling. explore perspective dual. duals enhancons situations repulson singularities absent. argue supergravity unreliable enhancon points. reliable sugra duals coulomb branch enhancon screened. explore singularities reappear moves coulomb branch comment phenomenon. analyzing duality encountered unexpected surprise supergravity reliable supersymmetric somewhat weaker expectation theory. .comment pages
|
non_dup
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[] |
42692364
|
10.1007/JHEP07(2016)013
|
The scotogenic scenario provides an attractive approach to both Dark Matter
and neutrino mass generation, in which the same symmetry that stabilises Dark
Matter also ensures the radiative seesaw origin of neutrino mass. However the
simplest scenario may suffer from inconsistencies arising from the spontaneous
breaking of the underlying $\mathbb{Z}_2$ symmetry. Here we show that the
singlet-triplet extension of the simplest model naturally avoids this problem
due to the presence of scalar triplets neutral under the $\mathbb{Z}_2$ which
affect the evolution of the couplings in the scalar sector. The scenario offers
good prospects for direct WIMP Dark Matter detection through the nuclear recoil
method.Comment: 16 pages, 7 figure
|
Consistency of WIMP Dark Matter as radiative neutrino mass messenger
|
consistency of wimp dark matter as radiative neutrino mass messenger
|
scotogenic attractive stabilises ensures radiative seesaw mass. simplest suffer inconsistencies arising spontaneous breaking mathbb symmetry. singlet triplet simplest naturally avoids triplets neutral mathbb couplings sector. offers prospects wimp recoil pages
|
non_dup
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[] |
42719163
|
10.1007/JHEP07(2016)014
|
We consider possible discretizations for a gauge-fixed Green-Schwarz action
of Type IIB superstring. We use them for measuring the action, from which we
extract the cusp anomalous dimension of planar $\mathcal{N}=4$ SYM as derived
from AdS/CFT, as well as the mass of the two $AdS$ excitations transverse to
the relevant null cusp classical string solution. We perform lattice
simulations employing a Rational Hybrid Monte Carlo (RHMC) algorithm and two
Wilson-like fermion discretizations, one of which preserves the global $SO(6)$
symmetry of the model. We compare our results with the expected behavior at
various values of $g=\frac{\sqrt{\lambda}}{4\pi}$. For both the observables, we
find a good agreement for large $g$, which is the perturbative regime of the
sigma-model. For smaller values of $g$, the expectation value of the action
exhibits a deviation compatible with the presence of quadratic divergences.
After their non-perturbative subtraction the continuum limit can be taken, and
suggests a qualitative agreement with the non-perturbative expectation from
AdS/CFT. Furthermore, we detect a phase in the fermion determinant, whose
origin we explain, that for very small $g$ leads to a sign problem not
treatable via standard reweigthing. The continuum extrapolations of the
observables in the two different discretizations agree within errors, which is
strongly suggesting that they lead to the same continuum limit. Part of the
results discussed here were presented earlier in arXiv:1601.04670.Comment: 33 pages, 14 figures, 2 Tables. Text overlap with the Conference
Proceedings where some preliminary results were presented, arXiv:1601.04670v
|
Green-Schwarz superstring on the lattice
|
green-schwarz superstring on the lattice
|
discretizations schwarz superstring. measuring extract cusp anomalous planar mathcal excitations cusp solution. employing rational hybrid monte carlo rhmc wilson fermion discretizations preserves model. frac sqrt lambda observables perturbative sigma model. expectation exhibits compatible quadratic divergences. perturbative subtraction continuum qualitative perturbative expectation cft. detect fermion determinant treatable reweigthing. continuum extrapolations observables discretizations agree continuum limit. pages tables. overlap preliminary
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non_dup
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[] |
42669088
|
10.1007/JHEP07(2016)015
|
We consider next-to-minimal supersymmetric standard model (NMSSM) which has a
gauge singlet superfield. In the scale invariant superpotential we do not have
the mass terms and the whole Lagrangian has an additional $Z_3$ symmetry. This
model can have light scalar and/or pseudoscalar allowed by the recent data from
LHC and the old data from LEP. We investigate the situation where a relatively
light charged Higgs can decay to such singlet-like pseudoscalar and a $W^\pm$
boson giving rise to final state containing $\tau$ and/or $b$-jets and
lepton(s). Such decay evades the recent bounds on charged Higgs from the LHC.
According to our PYTHIA-FastJet based simulation such a scenario can be probed
with early data of 10 fb$^{-1}$ at the LHC center of mass energy of 13 and 14
TeV.Comment: 22 pages, 15 figure
|
Non-standard charged Higgs decay at the LHC in Next-to-Minimal
Supersymmetric Standard Model
|
non-standard charged higgs decay at the lhc in next-to-minimal supersymmetric standard model
|
supersymmetric nmssm singlet superfield. superpotential lagrangian symmetry. pseudoscalar lep. singlet pseudoscalar boson giving jets lepton evades bounds lhc. pythia fastjet probed pages
|
non_dup
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[] |
42665628
|
10.1007/JHEP07(2016)016
|
In Stealth Supersymmetry, bounds on superpartners from direct searches can be
notably weaker than in standard supersymmetric scenarios, due to suppressed
missing energy. We present a set of simplified models of Stealth Supersymmetry
that motivate 13 TeV LHC searches. We focus on simplified models within the
Natural Supersymmetry framework, in which the gluino, stop, and Higgsino are
assumed to be lighter than other superpartners. Our simplified models exhibit
novel decay patterns that differ significantly from topologies of the Minimal
Supersymmetric Standard Model, with and without $R$-parity. We determine limits
on stops and gluinos from searches at the 8 TeV LHC. Existing searches
constitute a powerful probe of Stealth Supersymmetry gluinos with certain
topologies. However, we identify simplified models where the gluino can be
considerably lighter than 1 TeV. Stops are significantly less constrained in
Stealth Supersymmetry than the MSSM, and we have identified novel stop decay
topologies that are completely unconstrained by existing LHC searches.Comment: 14 pages plus appendice
|
Stealth Supersymmetry Simplified
|
stealth supersymmetry simplified
|
stealth supersymmetry bounds superpartners searches notably weaker supersymmetric scenarios suppressed missing energy. simplified stealth supersymmetry motivate searches. simplified supersymmetry gluino stop higgsino lighter superpartners. simplified exhibit topologies supersymmetric parity. stops gluinos searches lhc. searches constitute powerful stealth supersymmetry gluinos topologies. simplified gluino considerably lighter tev. stops constrained stealth supersymmetry mssm stop topologies unconstrained pages appendice
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non_dup
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[] |
42658595
|
10.1007/JHEP07(2016)017
|
Taking clues from the recent construction of the covariant action for type II
and heterotic string field theories, we construct a manifestly Lorentz
covariant action for type IIB supergravity, and discuss its gauge fixing
maintaining manifest Lorentz invariance. The action contains a
(non-gravitating) free 4-form field besides the usual fields of type IIB
supergravity. This free field, being completely decoupled from the interacting
sector, has no physical consequence.Comment: LaTeX, 33 pages; v2,v3: references added; v4: added new section on
supersymmetr
|
Covariant Action for Type IIB Supergravity
|
covariant action for type iib supergravity
|
clues covariant heterotic manifestly lorentz covariant supergravity fixing maintaining manifest lorentz invariance. gravitating besides usual supergravity. decoupled interacting latex pages supersymmetr
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non_dup
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[] |
42692230
|
10.1007/JHEP07(2016)018
|
In this paper we derive the projectors to all irreducible SO(d)
representations (traceless mixed-symmetry tensors) that appear in the partial
wave decomposition of a conformal correlator of four stress-tensors in d
dimensions. These projectors are given in a closed form for arbitrary length
$l_1$ of the first row of the Young diagram. The appearance of Gegenbauer
polynomials leads directly to recursion relations in $l_1$ for seed conformal
blocks. Further results include a differential operator that generates the
projectors to traceless mixed-symmetry tensors and the general normalization
constant of the shadow operator.Comment: 49 pages, 1 Mathematica notebook, many figures, v2: add reference
|
Projectors and seed conformal blocks for traceless mixed-symmetry
tensors
|
projectors and seed conformal blocks for traceless mixed-symmetry tensors
|
derive projectors irreducible representations traceless tensors decomposition conformal correlator tensors dimensions. projectors diagram. appearance gegenbauer polynomials recursion seed conformal blocks. generates projectors traceless tensors normalization shadow pages mathematica notebook
|
non_dup
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[] |
42705419
|
10.1007/JHEP07(2016)019
|
Violating the strong constraint of double field theory, non-geometric fluxes
were argued to give rise to noncommutative/nonassociative structures. We derive
in a rather pedestrian physicist way a differential geometry on the simplest
nonassociative (phase-)space arising for a constant non-geometric R-flux. This
provides a complementary presentation to the quasi-Hopf representation
categorial one delivered by Barnes, Schenkel, Szabo in
arXiv:1409.6331+1507.02792. As there, the notions of tensors, covariant
derivative, torsion and curvature find a star-generalization. We continue the
construction with the introduction of a star-metric and its star-inverse where,
due to the nonassociativity, we encounter major deviations from the familiar
structure. Comments on the Levi-Civita connection, a star-Einstein-Hilbert
action and the relation to string theory are included, as well.Comment: 38 pages, v2: ref. adde
|
Towards a Theory of Nonassociative Gravity
|
towards a theory of nonassociative gravity
|
violating geometric fluxes argued noncommutative nonassociative structures. derive pedestrian physicist simplest nonassociative arising geometric flux. complementary presentation quasi hopf categorial delivered barnes schenkel szabo notions tensors covariant torsion curvature generalization. continue nonassociativity encounter deviations familiar structure. comments levi civita connection einstein hilbert pages ref. adde
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non_dup
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[] |
42668624
|
10.1007/JHEP07(2016)021
|
Low scale string models naturally have axion-like pseudoscalars which couple
directly to gluons and photons (but not $W$s) at tree level. We show how they
typically get tree level masses in the presence of closed string fluxes,
consistent with the axion discrete gauge symmetry, in a way akin of the axion
monodromy of string inflation and relaxion models. We discuss the possibility
that the hints for a resonance at 750 GeV recently reported at ATLAS and CMS
could correspond to such a heavy axion state (megaxion). Adjusting the
production rate and branching ratios suggests the string scale to be of order
$M_s$ ~ $7 - 10^4$ TeV, depending on the compactification geometry. If this
interpretation was correct, one extra $Z'$ gauge boson could be produced before
reaching the string threshold at LHC and future colliders.Comment: 26 pages, 3 figures, 1 Megaxio
|
A Megaxion at 750 GeV as a First Hint of Low Scale String Theory
|
a megaxion at 750 gev as a first hint of low scale string theory
|
naturally axion pseudoscalars couple gluons photons level. fluxes axion akin axion monodromy inflation relaxion models. hints atlas axion megaxion adjusting branching compactification geometry. extra boson reaching pages megaxio
|
non_dup
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[] |
42734663
|
10.1007/JHEP07(2016)022
|
We study the new physics contributions to neutrinoless double beta decay
($0\nu\beta \beta$) half-life and lepton flavour violation (LFV) amplitude
within the framework of the minimal left-right symmetric model (MLRSM).
Considering all possible new physics contributions to $0\nu\beta \beta$ and
charged lepton flavour violation $\mu \rightarrow e \gamma, \mu \rightarrow 3e$
in MLRSM, we constrain the parameter space of the model from the requirement of
satisfying existing experimental bounds. Assuming the breaking scale of the
left-right symmetry to be $\mathcal{O}(1)$ TeV accessible at ongoing and near
future collider experiments, we consider the most general type I+II seesaw
mechanism for the origin of tiny neutrino masses. Choosing the relative
contribution of the type II seesaw term allows us to calculate the right handed
neutrino mass matrix as well as Dirac neutrino mass matrix as a function of the
model parameters, required for the calculation of $0\nu\beta \beta$ and LFV
amplitudes. We show that such a general type I+II seesaw structure results in
more allowed parameter space compared to individual type I or type II seesaw
cases considered in earlier works. In particular, we show that the doubly
charged scalar masses $M_{\Delta}$ are allowed to be smaller than the heaviest
right handed neutrino mass $M_N$ from the present experimental bounds in these
scenarios which is in contrast to earlier results with individual type I or
type II seesaw showing $M_{\Delta} > M_N$.Comment: 23 pages and 21 figures. minor revision, to appear in JHEP. arXiv
admin note: text overlap with arXiv:1509.0180
|
Charged Lepton Flavour Violation and Neutrinoless Double Beta Decay in
Left-Right Symmetric Models with Type I+II Seesaw
|
charged lepton flavour violation and neutrinoless double beta decay in left-right symmetric models with type i+ii seesaw
|
neutrinoless beta beta beta lepton flavour violation mlrsm beta beta lepton flavour violation rightarrow gamma rightarrow mlrsm constrain requirement satisfying bounds. breaking mathcal accessible ongoing collider seesaw tiny masses. choosing seesaw handed dirac beta beta amplitudes. seesaw seesaw works. doubly delta heaviest handed bounds scenarios seesaw delta .comment pages figures. minor revision jhep. admin overlap
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non_dup
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[] |
42679161
|
10.1007/JHEP07(2016)024
|
In the context of three-dimensional conformal higher spin theory we derive,
in the frame field formulation, the full non-linear spin 3 Cotton equation
coupled to spin 2. This is done by solving the corresponding Chern-Simons gauge
theory system of equations, that is, using $F=0$ to eliminate all auxiliary
fields and thus expressing the Cotton equation in terms of just the spin 3
frame field and spin 2 covariant derivatives and tensors (Schouten). In this
derivation we neglect the spin 4 and higher spin sectors and approximate the
star product commutator by a Poisson bracket. The resulting spin 3 Cotton
equation is complicated but can be related to linearized versions in the metric
formulation obtained previously by other authors. The expected symmetry (spin 3
"translation", "Lorentz" and "dilatation") properties are verified for Cotton
and other relevant tensors but some perhaps unexpected features emerge in the
process, in particular in relation to the non-linear equations. We discuss the
structure of this non-linear spin 3 Cotton equation but its explicit form is
only presented here, in an exact but not completely refined version, in
appended files obtained by computer algebra methods. Both the frame field and
metric formulations are provided.Comment: 45 pages, 2 ancillary files, v.2 references and comments on higher
spin invariant metric adde
|
The non-linear coupled spin 2 - spin 3 Cotton equation in three
dimensions
|
the non-linear coupled spin 2 - spin 3 cotton equation in three dimensions
|
conformal derive formulation cotton solving chern simons eliminate auxiliary expressing cotton covariant derivatives tensors schouten derivation neglect sectors approximate commutator poisson bracket. cotton complicated linearized versions formulation authors. translation lorentz dilatation verified cotton tensors perhaps unexpected emerge equations. cotton refined appended files methods. formulations pages ancillary files comments adde
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non_dup
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[] |
42663223
|
10.1007/JHEP07(2016)025
|
We study the supersymmetric partition function of 4d supersymmetric gauge
theories with a U(1) R-symmetry on Euclidean $S^3\times S_\beta^1$, with $S^3$
the unit-radius squashed three-sphere, and $\beta$ the circumference of the
circle. For superconformal theories, this partition function coincides (up to a
Casimir energy factor) with the 4d superconformal index.
The partition function can be computed exactly using supersymmetric
localization of the gauge theory path-integral. It takes the form of an
elliptic hypergeometric integral, which may be viewed as a matrix-integral over
the moduli space of the holonomies of the gauge fields around $S_\beta^1$. At
high temperatures ($\beta\to 0$, corresponding to the hyperbolic limit of the
elliptic hypergeometric integral) we obtain from the matrix-integral a quantum
effective potential for the holonomies. The effective potential is proportional
to the temperature. Therefore the high-temperature limit further localizes the
matrix-integral to the locus of the minima of the potential. If the effective
potential is positive semi-definite, the leading high-temperature asymptotics
of the partition function is given by the formula of Di Pietro and Komargodski,
and the subleading asymptotics is connected to the Coulomb branch dynamics on
$R^3\times S^1$. In theories where the effective potential is not positive
semi-definite, the Di Pietro-Komargodski formula needs to be modified. In
particular, this modification occurs in the SU(2) theory of
Intriligator-Seiberg-Shenker, and the SO(N) theory of Brodie-Cho-Intriligator,
both believed to exhibit "misleading" anomaly matchings, and both believed to
yield interacting superconformal field theories with $c<a$.
Two new simple tests for dualities between 4d supersymmetric gauge theories
emerge as byproducts of our analysis.Comment: 54+10 pages; 9 figures. v5: minor improvements, and added references;
the discussion of the IR fixed point of the SO(n) BCI theory for n>10
removed, as the mixing of its R-current with an emergent accidental symmetry
was not treated properly. v6: minor improvement
|
High-temperature asymptotics of supersymmetric partition functions
|
high-temperature asymptotics of supersymmetric partition functions
|
supersymmetric partition supersymmetric euclidean beta squashed sphere beta circumference circle. superconformal partition coincides casimir superconformal index. partition supersymmetric localization integral. elliptic hypergeometric viewed moduli holonomies beta beta hyperbolic elliptic hypergeometric holonomies. temperature. localizes locus minima potential. definite asymptotics partition pietro komargodski subleading asymptotics coulomb branch definite pietro komargodski modified. modification intriligator seiberg shenker brodie intriligator believed exhibit misleading anomaly matchings believed interacting superconformal dualities supersymmetric emerge byproducts pages figures. minor improvements removed emergent accidental properly. minor
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non_dup
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[] |
42671956
|
10.1007/JHEP07(2016)026
|
It is known that the large N expansion of the partition function in ABJM
theory on a three-sphere is completely determined by the topological string on
local Hirzebruch surface F_0. In this note, we investigate the ABJM partition
function on an ellipsoid, which has a conventional deformation parameter b.
Using 3d mirror symmetry, we find a remarkable relation between the ellipsoid
partition function for b^2=3 (or b^2=1/3) in ABJM theory at k=1 and a matrix
model for the topological string on another Calabi-Yau threefold, known as
local P^2. As in the case of b=1, we can compute the full large N expansion of
the partition function in this case. This is the first example of the complete
large N solution in ABJM theory on the squashed sphere. Using the obtained
results, we also analyze the supersymmetric Renyi entropy.Comment: 29 page
|
ABJM on ellipsoid and topological strings
|
abjm on ellipsoid and topological strings
|
partition abjm sphere topological hirzebruch abjm partition ellipsoid deformation mirror remarkable ellipsoid partition abjm topological calabi threefold partition case. abjm squashed sphere. analyze supersymmetric renyi
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non_dup
|
[] |
42736274
|
10.1007/JHEP07(2016)028
|
We give the free energy of equilibrium relativistic matter subject to
external gravitational and electromagnetic fields, to one-derivative order in
the gradients of the external fields. The free energy allows for a
straightforward derivation of bound currents and bound momenta in equilibrium.
At leading order, the energy-momentum tensor admits a simple expression in
terms of the polarization tensor. Beyond the leading order, electric and
magnetic polarization vectors are intrinsically ambiguous. The physical effects
of polarization, such as the correlation between the magneto-vortically induced
surface charge and the electro-vortically induced surface current, are not
ambiguous.Comment: 26 page
|
Thermodynamics of polarized relativistic matter
|
thermodynamics of polarized relativistic matter
|
relativistic gravitational electromagnetic gradients fields. straightforward derivation currents momenta equilibrium. admits tensor. intrinsically ambiguous. magneto vortically electro vortically
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non_dup
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[] |
42676789
|
10.1007/JHEP07(2016)029
|
We study heterotic supergravity on the conifold and its Z2 orbifold with
Abelian gauge fields and three-form flux. At large distances, these solutions
are locally Ricci-flat, have a magnetic flux through the two-sphere at infinity
as well as non-zero five-brane charge. For a given flux, our family of
solutions has three real parameters, the size of the pair of two spheres in the
IR and the dilaton zero mode. We present an explicit analytic solution for the
decoupled near horizon region where for a given flux, the size of the cycles is
frozen and the only parameter is the dilaton zero mode. We also present an
exactly solvable worldsheet CFT for this near horizon region. When one of the
two cycles has vanishing size, the near horizon region no longer exists but we
obtain a solution on the (unorbifolded) resolved conifold.Comment: 44 pages, 22 figure
|
The Abelian Heterotic Conifold
|
the abelian heterotic conifold
|
heterotic supergravity conifold orbifold abelian flux. distances locally ricci sphere infinity brane charge. spheres dilaton mode. analytic decoupled horizon cycles frozen dilaton mode. solvable worldsheet horizon region. cycles vanishing horizon unorbifolded resolved pages
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non_dup
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[] |
42724809
|
10.1007/JHEP07(2016)030
|
As an interpretation of the 750 GeV diphoton excesses recently reported by
both ATLAS and CMS collaborations, we consider a simple extension of the
Standard Model with a Dirac fermion dark matter where a singlet complex scalar
field mediates between dark matter and SM particles via effective couplings to
SM gauge bosons and/or Higgs-portal. In this model, we can accommodate the
diphoton events through the direct and/or cascade decays of pseudo-scalar and
real scalar partners of the complex scalar field. We show that mono-jet
searches and gamma-ray observations are complementary in constraining the
region where the width of the diphoton resonance can be enhanced due to the
couplings of the resonance to dark matter and the correct relic density is
obtained. In the case of cascade decay of the resonance, the effective
couplings of singlet scalars can be smaller, but the model is still testable by
the future discrimination between single photon and photon-jet at the LHC as
well as the gamma-ray searches for the cascade annihilation of dark matter.Comment: 30 pages, 10 figures, To appear in Journal of High Energy Physic
|
Diphoton resonance confronts dark matter
|
diphoton resonance confronts dark matter
|
diphoton excesses atlas collaborations dirac fermion singlet mediates couplings bosons portal. accommodate diphoton cascade decays pseudo partners field. mono searches gamma complementary constraining diphoton couplings relic obtained. cascade couplings singlet scalars testable discrimination gamma searches cascade annihilation pages physic
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non_dup
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[] |
42665223
|
10.1007/JHEP07(2016)031
|
Collapsing shells form horizons, and when the curvature is small classical
general relativity is believed to describe this process arbitrarily well. On
the other hand, quantum information theory based (fuzzball/firewall) arguments
suggest the existence of some structure at the black hole horizon. This
structure can only form if classical general relativity stops being the correct
description of the collapsing shell before it reaches the horizon size. We
present strong evidence that classical general relativity can indeed break down
prematurely, by explicitly computing the quantum tunneling amplitude of a
collapsing shell of branes into smooth horizonless microstate geometries. We
show that the amplitude for tunneling into microstate geometries with a large
number of topologically non-trivial cycles is parametrically larger than
exp(-S), which indicates that the shell can tunnel into a horizonless
configuration long before the horizon has any chance to form. We also use this
technology to investigate the tunneling of M2 branes into LLM bubbling
geometries.Comment: 26 pages + appendi
|
Tunneling into Microstate Geometries: Quantum Effects Stop Gravitational
Collapse
|
tunneling into microstate geometries: quantum effects stop gravitational collapse
|
collapsing shells horizons curvature relativity believed arbitrarily well. fuzzball firewall arguments horizon. relativity stops collapsing reaches horizon size. relativity break prematurely explicitly tunneling collapsing branes horizonless microstate geometries. tunneling microstate geometries topologically trivial cycles parametrically tunnel horizonless horizon chance form. tunneling branes bubbling pages appendi
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non_dup
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[] |
42698075
|
10.1007/JHEP07(2016)032
|
We propose a method of computing one-loop determinants in black hole
spacetimes (with emphasis on asymptotically anti-de Sitter black holes) that
may be used for numerics when completely-analytic results are unattainable. The
method utilizes the expression for one-loop determinants in terms of
quasinormal frequencies determined by Denef, Hartnoll and Sachdev in
\cite{Denef:2009kn}. A numerical evaluation must face the fact that the sum
over the quasinormal modes, indexed by momentum and overtone numbers, is
divergent. A necessary ingredient is then a regularization scheme to handle the
divergent contributions of individual fixed-momentum sectors to the partition
function. To this end, we formulate an effective two-dimensional problem in
which a natural refinement of standard heat kernel techniques can be used to
account for contributions to the partition function at fixed momentum. We test
our method in a concrete case by reproducing the scalar one-loop determinant in
the BTZ black hole background. We then discuss the application of such
techniques to more complicated spacetimes.Comment: 49 pages, 2 figures. v2: Minor clarifications added to abstract and
main tex
|
Computing black hole partition functions from quasinormal modes
|
computing black hole partition functions from quasinormal modes
|
propose determinants spacetimes emphasis asymptotically sitter holes numerics analytic unattainable. utilizes determinants quasinormal denef hartnoll sachdev cite denef quasinormal indexed overtone divergent. ingredient regularization handle divergent sectors partition function. formulate refinement kernel partition momentum. concrete reproducing determinant background. complicated pages figures. minor clarifications
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non_dup
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[] |
42668994
|
10.1007/JHEP07(2016)033
|
Non-Standard neutral current Interactions (NSIs) of neutrinos with matter can
alter the pattern of neutrino oscillation due to the coherent forward
scattering of neutrinos on the medium. This effect makes long-baseline neutrino
experiments such as NO$\nu$A and DUNE a sensitive probe of beyond standard
model (BSM) physics. We construct light mediator models that can give rise to
both lepton flavor conserving as well as Lepton Flavor Violating (LFV) neutral
current NSI. We outline the present phenomenological viability of these models
and future prospects to test them. We predict a lower bound on Br$(H\to \mu
\tau)$ in terms of the parameters that can be measured by DUNE and NO$\nu$A,
and show that the hint for $H\to \mu \tau$ in current LHC data can be
accommodated in our model. A large part of the parameter space of the model is
already constrained by the bounds on Br$(\tau \to Z^\prime \mu)$ and rare meson
decays and can in principle fully tested by improving these bounds.Comment: 19 pages, 1 figure; new bounds added in v
|
Lepton Flavor Violating Non-Standard Interactions via Light Mediators
|
lepton flavor violating non-standard interactions via light mediators
|
neutral nsis neutrinos alter oscillation coherent neutrinos medium. dune physics. mediator lepton flavor conserving lepton flavor violating neutral nsi. outline phenomenological viability prospects them. predict dune hint accommodated model. constrained bounds prime rare meson decays improving pages bounds
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non_dup
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[] |
42731512
|
10.1007/JHEP07(2016)034
|
In this paper we calculate properties of the three-dimensional system of N
species of fermions at zero temperature and finite chemical potential, with the
four-fermionic interaction of the Thirring type. We observe that this model
fits consistently into framework of the Landau Fermi liquid theory, and
possesses a non-trivial zeroth and first Landau parameters. Our result is
derived to all orders of the Thirring coupling constant and to the leading
order of the large-N expansion. In particular we solve for the exact
current-current correlation function, and show that it exhibits a singular
behavior at zero frequency and twice of the Fermi momentum
|
Large N Thirring Matter in Three Dimensions
|
large n thirring matter in three dimensions
|
fermions fermionic thirring type. fits consistently landau fermi possesses trivial zeroth landau parameters. orders thirring expansion. solve exhibits singular twice fermi
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non_dup
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[] |
42677609
|
10.1007/JHEP07(2016)035
|
In this article we conjecture a relationship between 5d SCFT's, that can be
engineered by 5-brane webs in the presence of an $O5^-$-plane, and 4d class S
theories of type D. The specific relation is that compactification on a circle
of the former leads to the latter. We present evidence for this conjecture. One
piece of evidence, which is also an interesting application of this, is that it
suggests identifications between different class S theories. This can in turn
be tested by comparing their central charges.Comment: 30 pages, 18 figures; v2 minor revision, version published in JHE
|
Brane webs in the presence of an $O5^-$-plane and 4d class S theories of
type D
|
brane webs in the presence of an $o5^-$-plane and 4d class s theories of type d
|
conjecture scft engineered brane webs compactification circle former latter. conjecture. piece identifications theories. pages minor revision
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non_dup
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[] |
42735846
|
10.1007/JHEP07(2016)036
|
We provide explicit formulas for the number of vacua of four-dimensional pure
N=1 super Yang-Mills theories on a circle, with any simple gauge algebra and
any choice of center and spectrum of line operators. These form a key
ingredient in the semi-classical calculation of the number of massive vacua of
N=1* gauge theories with gauge algebra su(n) compactified on a circle. Using
arithmetic, we express that number in an SL(2,Z) duality invariant manner. We
confirm our tally of massive vacua of the N=1* theories by a count of
inequivalent extrema of the exact superpotential. Furthermore, we compute a
formula for a refined index that distinguishes massive vacua according to their
unbroken discrete gauge group.Comment: 22 pages, 1 figur
|
The Arithmetic of Supersymmetric Vacua
|
the arithmetic of supersymmetric vacua
|
formulas vacua super mills circle operators. ingredient massive vacua compactified circle. arithmetic express duality manner. confirm tally massive vacua count inequivalent extrema superpotential. refined distinguishes massive vacua unbroken pages figur
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non_dup
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[] |
42723435
|
10.1007/JHEP07(2016)038
|
The recent work by Iha et al shows an upper bound on mass anomalous dimension
$\gamma_m$ of multi-flavor massless QCD at the renormalization group fixed
point from the conformal bootstrap in $SU(N_F)_V$ symmetric conformal field
theories under the assumption that the fixed point is realizable with the
lattice regularization based on staggered fermions. We show that the almost
identical but slightly stronger bound applies to the regularization based on
Wilson fermions (or domain wall fermions) by studying the conformal bootstrap
in $SU(N_f)_L \times SU(N_f)_R$ symmetric conformal field theories. For
$N_f=8$, our bound implies $\gamma_m < 1.31$ to avoid dangerously irrelevant
operators that are not compatible with the lattice symmetry.Comment: 13 pages, 4 figures, v:2 published version with extra data adde
|
Bootstrap bound for conformal multi-flavor QCD on lattice
|
bootstrap bound for conformal multi-flavor qcd on lattice
|
anomalous gamma flavor massless renormalization conformal bootstrap conformal realizable regularization staggered fermions. stronger applies regularization wilson fermions fermions studying conformal bootstrap conformal theories. gamma avoid dangerously irrelevant compatible pages extra adde
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non_dup
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[] |
42676436
|
10.1007/JHEP07(2016)039
|
Simplified models provide a useful tool to conduct the search and exploration
of physics beyond the Standard Model in a model-independent fashion. In this
work we consider the complementarity of indirect searches for new physics in
Higgs couplings and distributions with direct searches for new particles, using
a simplified model which includes a new singlet scalar resonance and
vector-like fermions that can mix with the SM top-quark. We fit this model to
the combined ATLAS and CMS 125 GeV Higgs production and coupling measurements
and other precision electroweak constraints, and explore in detail the effects
of the new matter content upon Higgs production and kinematics. We highlight
some novel features and decay modes of the top partner phenomenology, and
discuss prospects for Run II.Comment: 27 pages, 10 figure
|
Simplified Models for Higgs Physics: Singlet Scalar and Vector-like
Quark Phenomenology
|
simplified models for higgs physics: singlet scalar and vector-like quark phenomenology
|
simplified conduct exploration fashion. complementarity indirect searches couplings searches simplified singlet fermions quark. atlas precision electroweak explore kinematics. highlight partner phenomenology prospects pages
|
non_dup
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[] |
29556307
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10.1007/JHEP07(2016)040
|
We discuss two measures of entanglement in quantum field theory and their
holographic realizations. For field theories admitting a global symmetry, we
introduce a global symmetry entanglement entropy, associated with the
partitioning of the symmetry group. This quantity is proposed to be related to
the generalized holographic entanglement entropy defined via the partitioning
of the internal space of the bulk geometry. The second measure of quantum field
theory entanglement is the field space entanglement entropy, obtained by
integrating out a subset of the quantum fields. We argue that field space
entanglement entropy cannot be precisely realised geometrically in a
holographic dual. However, for holographic geometries with interior decoupling
regions, the differential entropy provides a close analogue to the field space
entanglement entropy. We derive generic descriptions of such inner throat
regions in terms of gravity coupled to massive scalars and show how the
differential entropy in the throat captures features of the field space
entanglement entropy.Comment: 40 pages, 3 figure
|
Generalized entanglement entropy
|
generalized entanglement entropy
|
entanglement holographic realizations. admitting entanglement partitioning group. quantity holographic entanglement partitioning geometry. entanglement entanglement integrating fields. argue entanglement precisely realised geometrically holographic dual. holographic geometries interior decoupling analogue entanglement entropy. derive generic descriptions throat massive scalars throat captures entanglement pages
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non_dup
|
[] |
42715286
|
10.1007/JHEP07(2016)043
|
In previous work, we presented a statistical scan over the soft supersymmetry
breaking parameters of the minimal SUSY $B-L$ model. For specificity of
calculation, unification of the gauge parameters was enforced by allowing the
two ${\mathbb Z}_{3}\times {\mathbb Z}_{3}$ Wilson lines to have mass scales
separated by approximately an order of magnitude. This introduced an additional
"left-right" sector below the unification scale. In this paper, for three
important reasons, we modify our previous analysis by demanding that the mass
scales of the two Wilson lines be simultaneous and equal to an "average
unification" mass $\left<M_{U}\right>$. The present analysis is 1) more
"natural" than the previous calculations, which were only valid in a very
specific region of the Calabi-Yau moduli space, 2) the theory is conceptually
simpler in that the left-right sector has been removed and 3) in the present
analysis the lack of gauge unification is due to threshold
effects--particularly heavy string thresholds, which we calculate statistically
in detail. As in our previous work, the theory is renormalization group evolved
from $\left<M_{U}\right>$ to the electroweak scale--being subjected,
sequentially, to the requirement of radiative $B-L$ and electroweak symmetry
breaking, the present experimental lower bounds on the $B-L$ vector boson and
sparticle masses, as well as the lightest neutral Higgs mass of $\sim$125 GeV.
The subspace of soft supersymmetry breaking masses that satisfies all such
constraints is presented and shown to be substantial.Comment: 45 pages, 19 figures. References added. Brief review of the B-L MSSM
formalism in arXiv:1503.01473 included for clarity. Typographical errors
correcte
|
The Minimal SUSY $B-L$ Model: Simultaneous Wilson Lines and String
Thresholds
|
the minimal susy $b-l$ model: simultaneous wilson lines and string thresholds
|
scan supersymmetry breaking susy model. specificity unification enforced allowing mathbb mathbb wilson separated magnitude. unification scale. reasons modify demanding wilson simultaneous unification valid calabi moduli conceptually simpler removed unification thresholds statistically detail. renormalization evolved electroweak subjected sequentially requirement radiative electroweak breaking bounds boson sparticle lightest neutral gev. subspace supersymmetry breaking satisfies pages figures. added. brief mssm formalism clarity. typographical correcte
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non_dup
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[] |
42681700
|
10.1007/JHEP07(2016)045
|
Compactifications of the physical superstring to two dimensions provide a
general template for realizing 2D conformal field theories coupled to
worldsheet gravity, i.e. non-critical string theories. Motivated by this
observation, in this paper we determine the quasi-topological 8D theory which
governs the vacua of 2D N = (0,2) gauged linear sigma models (GLSMs) obtained
from compactifications of type I and heterotic strings on a Calabi-Yau
fourfold. We also determine the quasi-topological 6D theory governing the 2D
vacua of intersecting 7-branes in compactifications of F-theory on an
elliptically fibered Calabi-Yau fivefold, where matter fields and interaction
terms localize on lower-dimensional subspaces, i.e. defect operators. To cancel
anomalies / cancel tadpoles, these GLSMs must couple to additional chiral
sectors, which in some cases do not admit a known description in terms of a UV
GLSM. Additionally, we find that constructing an anomaly free spectrum can
sometimes break supersymmetry due to spacetime filling anti-branes. We also
study various canonical examples such as the standard embedding of heterotic
strings on a Calabi-Yau fourfold and F-theoretic "rigid clusters" with no local
deformation moduli of the elliptic fibration.Comment: v4: 102 pages, 2 figures, clarifications adde
|
UV Completions for Non-Critical Strings
|
uv completions for non-critical strings
|
compactifications superstring template realizing conformal worldsheet i.e. theories. motivated quasi topological governs vacua gauged sigma glsms compactifications heterotic strings calabi fourfold. quasi topological governing vacua intersecting branes compactifications elliptically fibered calabi fivefold localize subspaces i.e. defect operators. cancel anomalies cancel tadpoles glsms couple chiral sectors admit glsm. additionally constructing anomaly sometimes break supersymmetry spacetime filling branes. canonical embedding heterotic strings calabi fourfold theoretic rigid deformation moduli elliptic pages clarifications adde
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non_dup
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[] |
42698285
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10.1007/JHEP07(2016)046
|
We study the BPS index for the four-dimensional rank-one N=2 superconformal
field theories H_0, H_1, H_2, E_6, E_7, E_8. We consider compactifications of
the E-string theory on T^2 in which these theories arise as low energy limits.
Using this realization we clarify the general structure of the BPS index. The
index is characterized by two exponents and a sequence of invariants. We
determine the exponents and the first few invariants.Comment: 17 pages, v2: some clarifications and a reference added, published
versio
|
BPS index and 4d N=2 superconformal field theories
|
bps index and 4d n=2 superconformal field theories
|
superconformal compactifications arise limits. realization clarify index. exponents invariants. exponents pages clarifications versio
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non_dup
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[] |
42714628
|
10.1007/JHEP07(2016)048
|
We consider the question of entanglement conservation in the context of the
ER=EPR correspondence equating quantum entanglement with wormholes. In quantum
mechanics, the entanglement between a system and its complement is conserved
under unitary operations that act independently on each; ER=EPR suggests that
an analogous statement should hold for wormholes. We accordingly prove a new
area theorem in general relativity: for a collection of dynamical wormholes and
black holes in a spacetime satisfying the null curvature condition, the maximin
area for a subset of the horizons (giving the largest area attained by the
minimal cross section of the multi-wormhole throat separating the subset from
its complement) is invariant under classical time evolution along the outermost
apparent horizons. The evolution can be completely general, including horizon
mergers and the addition of classical matter satisfying the null energy
condition. This theorem is the gravitational dual of entanglement conservation
and thus constitutes an explicit characterization of the ER=EPR duality in the
classical limit.Comment: 16 pages, 2 figure
|
Entanglement Conservation, ER=EPR, and a New Classical Area Theorem for
Wormholes
|
entanglement conservation, er=epr, and a new classical area theorem for wormholes
|
entanglement conservation correspondence equating entanglement wormholes. mechanics entanglement complement conserved unitary operations independently analogous statement hold wormholes. accordingly relativity wormholes holes spacetime satisfying curvature maximin horizons giving attained wormhole throat separating complement outermost apparent horizons. horizon mergers satisfying condition. gravitational entanglement conservation constitutes duality pages
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non_dup
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[] |
42706123
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10.1007/JHEP07(2016)049
|
It is generally believed that the semiclassical AdS$_3$ higher spin gravity
could be described by a two dimensional conformal field theory with
${\cal{W}}$-algebra symmetry in the large central charge limit. In this paper,
we study the single interval entanglement entropy on the torus in the CFT with
a ${\cW}_3$ deformation. More generally we develop the monodromy analysis to
compute the two-point function of the light operators under a thermal density
matrix with a ${\cW}_3$ chemical potential to the leading order.
Holographically we compute the probe action of the Wilson line in the
background of the spin-3 black hole with a chemical potential. We find exact
agreement.Comment: 31 pages; References added;Minor correction, published versio
|
Higher spin entanglement entropy at finite temperature with chemical
potential
|
higher spin entanglement entropy at finite temperature with chemical potential
|
believed semiclassical conformal limit. entanglement torus deformation. monodromy order. holographically wilson potential. pages minor versio
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non_dup
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[] |
42701329
|
10.1007/JHEP07(2016)053
|
We perform a threshold resummation calculation for the associated production
of gluinos and gauginos at the LHC to the next-to-leading logarithmic accuracy.
Analytical results are presented for the process-dependent soft anomalous
dimension and the hard function. The resummed results are matched to a full
next-to-leading order calculation, for which we have generalised the previously
known results to the case of supersymmetric scenarios featuring non-universal
squark masses. Numerically, the next-to-leading logarithmic contributions
increase the total next-to-leading order cross section by 7 to 20% for central
scale choices and gluino masses of 3 to 6 TeV, respectively, and reduce its
scale dependence typically from up to $\pm12$% to below $\pm3$%.Comment: 32 pages, 10 figures, 3 tables, comments and references adde
|
Soft gluon resummation for associated gluino-gaugino production at the
LHC
|
soft gluon resummation for associated gluino-gaugino production at the lhc
|
resummation gluinos gauginos logarithmic accuracy. anomalous function. resummed matched generalised supersymmetric scenarios featuring universal squark masses. numerically logarithmic choices gluino .comment pages tables comments adde
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non_dup
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[] |
42644419
|
10.1007/JHEP07(2016)054
|
We study wavefunctions on D$7$-branes with magnetic fluxes in the conifold.
Since some supersymmetric embeddings of D-branes on the $AdS_5\times T^{1,1}$
geometry are known, we consider one of the embeddings, especially the spacetime
filling D$7$-branes in which (a part of) the standard model is expected to be
realized. The explicit form of induced metric on the D$7$-branes allows us to
solve the Laplace and Dirac equations to evaluate matter wavefunctions in extra
dimensions analytically. We find that the zero-mode wavefunctions can be
localized depending on the configuration of magnetic fluxes on D$7$-branes, and
show some phenomenological aspects.Comment: 38 pages, 2 figure
|
Wavefunctions on magnetized branes in the conifold
|
wavefunctions on magnetized branes in the conifold
|
wavefunctions branes fluxes conifold. supersymmetric embeddings branes embeddings spacetime filling branes realized. branes solve laplace dirac wavefunctions extra analytically. wavefunctions localized fluxes branes phenomenological pages
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non_dup
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[] |
42716112
|
10.1007/JHEP07(2016)055
|
We study the multi-instanton partition functions of the $\Omega$-deformed
$\mathcal N =2^{*}$ $SU(2) $ gauge theory in the Nekrasov-Shatashvili (NS)
limit. They depend on the deformation parameters $\epsilon_{1}$, the scalar
field expectation value $a$, and the hypermultiplet mass $m$. At fixed
instanton number $k$, they are rational functions of $\epsilon_{1}, a, m$ and
we look for possible regularities that admit a parametrical description in the
number of instantons. In each instanton sector, the contribution to the
deformed Nekrasov prepotential has poles for "large" deformation parameters. To
clarify the properties of these singularities we exploit Bethe/gauge
correspondence and examine the special ratios $m/\epsilon_{1}$ at which the
associated spectral problem is $n$-gap. At these special points we illustrate
several structural simplifications occurring in the partition functions. After
discussing various tools to compute the prepotential, we analyze the
non-perturbative corrections up to $k=24$ instantons and present various closed
expressions for the coefficients of the singular terms. Both the regular and
singular parts of the prepotential are resummed over all instantons and
compared successfully with the exact prediction from the spectral theory of the
Lam\'e equation, showing that the pole singularities are an artifact of the
instanton expansion. The analysis is fully worked out in the 1-gap case, but
the final pole cancellation is proved for a generic ratio $m/\epsilon_{1}$
relating it to the gap width of the Lam\'e equation.Comment: 30 pages, v2: new appendix, extended acknowledgement
|
On the large $\Omega$-deformations in the Nekrasov-Shatashvili limit of
$\mathcal N=2^{*}$ SYM
|
on the large $\omega$-deformations in the nekrasov-shatashvili limit of $\mathcal n=2^{*}$ sym
|
instanton partition omega deformed mathcal nekrasov shatashvili limit. deformation epsilon expectation hypermultiplet instanton rational epsilon look regularities admit parametrical instantons. instanton deformed nekrasov prepotential poles deformation parameters. clarify singularities exploit bethe correspondence examine epsilon gap. illustrate simplifications occurring partition functions. discussing prepotential analyze perturbative instantons expressions singular terms. singular prepotential resummed instantons successfully pole singularities artifact instanton expansion. worked pole cancellation proved generic epsilon relating pages acknowledgement
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non_dup
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[] |
42690311
|
10.1007/JHEP07(2016)056
|
We present a collection of $\mathrm{CP}$-odd observables for the process
$pp\to t\,\left(\rightarrow b {\ell}^+ \nu_{\ell}\right)
\bar{t}\,\left(\rightarrow \bar{b} {\ell}^-{\bar{\nu}}_{\ell}\right)\,H$ that
are linearly dependent on the scalar ($\kappa_t$) and pseudoscalar
($\tilde{\kappa}_t$) top-Higgs coupling and hence sensitive to the
corresponding relative sign. The proposed observables are based on triple
product (TP) correlations that we extract from the expression for the
differential cross section in terms of the spin vectors of the top and antitop
quarks. In order to explore other possibilities, we progressively modify these
TPs, first by combining them, and then by replacing the spin vectors by the
lepton momenta or the $t$ and $\bar{t}$ momenta by their visible parts. We
generate Monte Carlo data sets for several benchmark scenarios, including the
Standard Model ($\kappa_t=1$, $\tilde{\kappa}_t=0$) and two scenarios with
mixed $\mathrm{CP}$ properties ($\kappa_t=1$, $\tilde{\kappa}_t=\pm 1$).
Assuming an integrated luminosity that is consistent with that envisioned for
the High Luminosity Large Hadron Collider, using Monte Carlo-truth and taking
into account only statistical uncertainties, we find that the most promising
observable can disentangle the "$\mathrm{CP}$-mixed" scenarios with an
effective separation of $\sim 19\sigma$. In the case of observables that do not
require the reconstruction of the $t$ and $\bar{t}$ momenta, the power of
discrimination is up to $\sim 13\sigma$ for the same number of events. We also
show that the most promising observables can still disentangle the
$\mathrm{CP}$-mixed scenarios when the number of events is reduced to values
consistent with expectations for the Large Hadron Collider in the near term.Comment: 28 pages, 7 figures. Published versio
|
Pseudoscalar top-Higgs coupling: Exploration of $\mathrm{CP}$-odd
observables to resolve the sign ambiguity
|
pseudoscalar top-higgs coupling: exploration of $\mathrm{cp}$-odd observables to resolve the sign ambiguity
|
mathrm observables rightarrow rightarrow linearly kappa pseudoscalar tilde kappa sign. observables triple extract antitop quarks. explore possibilities progressively modify combining replacing lepton momenta momenta visible parts. monte carlo benchmark scenarios kappa tilde kappa scenarios mathrm kappa tilde kappa luminosity envisioned luminosity hadron collider monte carlo truth promising observable disentangle mathrm scenarios sigma observables reconstruction momenta discrimination sigma events. promising observables disentangle mathrm scenarios expectations hadron collider pages figures. versio
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non_dup
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42692231
|
10.1007/JHEP07(2016)057
|
This paper develops a method to compute any bosonic conformal block as a
series expansion in the optimal radial coordinate introduced by Hogervorst and
Rychkov. The method reduces to the known result when the external operators are
all the same scalar operator, but it allows to compute conformal blocks for
external operators with spin. Moreover, we explain how to write closed form
recursion relations for the coefficients of the expansions. We study three
examples of four point functions in detail: one vector and three scalars; two
vectors and two scalars; two spin 2 tensors and two scalars. Finally, for the
case of two external vectors, we also provide a more efficient way to generate
the series expansion using the analytic structure of the blocks as a function
of the scaling dimension of the exchanged operator.Comment: 42 pages, 17 figures, 7 Mathematica files, v2: minor changes in the
text, typos correcte
|
Radial expansion for spinning conformal blocks
|
radial expansion for spinning conformal blocks
|
develops bosonic conformal coordinate hogervorst rychkov. reduces conformal blocks spin. recursion expansions. scalars scalars tensors scalars. analytic blocks exchanged pages mathematica files minor typos correcte
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non_dup
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[] |
42689316
|
10.1007/JHEP07(2016)058
|
We present benchmark points for LHC searches from flavored gauge mediation
models, in which messenger-matter couplings give flavor-dependent squark
masses. Our examples include spectra in which a single squark - stop, scharm,
or sup - is much lighter than all other colored superpartners, motivating
improved quark flavor tagging at the LHC. Many examples feature flavor mixing;
in particular, large stop-scharm mixing is possible. The correct Higgs mass is
obtained in some examples by virtue of the large stop A-term. We also revisit
the general flavor and CP structure of the models. Even though the A-terms can
be substantial, their contributions to EDM's are very suppressed, because of
the particular dependence of the A-terms on the messenger coupling. This holds
regardless of the messenger-coupling texture. More generally, the special
structure of the soft terms often leads to stronger suppression of flavor- and
CP-violating processes, compared to naive estimates.Comment: 32 pages, 11 figures. Updated to published versio
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LHC Benchmarks from Flavored Gauge Mediation
|
lhc benchmarks from flavored gauge mediation
|
benchmark searches flavored mediation messenger couplings flavor squark masses. squark stop scharm lighter colored superpartners motivating flavor tagging lhc. flavor stop scharm possible. virtue stop term. revisit flavor models. substantial suppressed messenger coupling. regardless messenger texture. stronger suppression flavor violating naive pages figures. updated versio
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non_dup
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42704660
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10.1007/JHEP07(2016)060
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We study scattering equations and formulas for tree amplitudes of various
theories in four dimensions, in terms of spinor helicity variables and on-shell
superspace for supersymmetric theories. As originally obtained in Witten's
twistor string theory and other twistor-string models, the equations can take
either polynomial or rational forms, and we clarify the simple relation between
them. We present new, four-dimensional formulas for all tree amplitudes in the
non-linear sigma model, a special Galileon theory and the maximally
supersymmetric completion of the Dirac-Born-Infeld theory. Furthermore, we
apply the formulas to study various double-soft theorems in these theories,
including the emissions of a pair of soft photons, fermions and scalars for
super-amplitudes in super-DBI theory.Comment: 22 pages, 2 tables; v2: ref added, minor typos fixe
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Scattering Equations, Twistor-string Formulas and Double-soft Limits in
Four Dimensions
|
scattering equations, twistor-string formulas and double-soft limits in four dimensions
|
formulas amplitudes spinor helicity superspace supersymmetric theories. originally witten twistor twistor rational clarify them. formulas amplitudes sigma galileon maximally supersymmetric completion dirac born infeld theory. formulas theorems photons fermions scalars super amplitudes super pages tables minor typos fixe
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non_dup
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[] |
42694975
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10.1007/JHEP07(2016)061
|
Recent LHC data hinted at a 750 GeV mass resonance that decays into two
photons. A significant feature of this resonance is that its decays to any
other Standard Model particles would be too low to be detected so far. Such a
state has a compelling explanation in terms of a scalar or a pseudoscalar that
is strongly coupled to vector states charged under the Standard Model gauge
groups. Such a scenario is readily accommodated in bulk RS with a scalar
localized in the bulk away from but close to the Higgs. Turning this around, we
argue that a good way to find the elusive bulk RS model might be the search for
a resonance with prominent couplings to gauge bosons.Comment: 14 pages, LaTeX, 7 figures. Discussion on suppression of decays to
Higgses revised, typos fixe
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A Diphoton Resonance from Bulk RS
|
a diphoton resonance from bulk rs
|
hinted decays photons. decays far. compelling explanation pseudoscalar groups. readily accommodated localized away higgs. turning argue elusive prominent couplings pages latex figures. suppression decays higgses revised typos fixe
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non_dup
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[] |
42716716
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10.1007/JHEP07(2016)062
|
We construct a double field theory coupled to the fields present in
Vasiliev's equations. Employing the "semi-covariant" differential geometry, we
spell a functional in which each term is completely covariant with respect to
$\mathbf{O}(4,4)$ T-duality, doubled diffeomorphisms, $\mathbf{Spin}(1,3)$
local Lorentz symmetry and, separately, $\mathbf{HS}(4)$ higher spin gauge
symmetry. We identify a minimal set of BPS-like conditions whose solutions
automatically satisfy the full Euler-Lagrange equations. As such a solution, we
derive a linear dilaton vacuum. With extra algebraic constraints further
supplemented, the BPS-like conditions reduce to the bosonic Vasiliev equations.Comment: 1+52 pages. v3) Eq.(2.57) added. To appear in JHE
|
Higher Spin Double Field Theory : A Proposal
|
higher spin double field theory : a proposal
|
vasiliev equations. employing covariant spell covariant mathbf duality doubled diffeomorphisms mathbf lorentz separately mathbf symmetry. automatically satisfy euler lagrange equations. derive dilaton vacuum. extra algebraic supplemented bosonic vasiliev pages. added.
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non_dup
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[] |
42687935
|
10.1007/JHEP07(2016)063
|
Preliminary ATLAS and CMS results from the first 13 TeV LHC run have
encountered an intriguing excess of events in the diphoton channel around the
invariant mass of 750 GeV. We investigate a possibility that the current excess
is due to a heavy resonance decaying to light metastable states, which in turn
give displaced decays to very highly collimated $e^+e^-$ pairs. Such decays may
pass the photon selection criteria, and successfully mimic the diphoton events,
especially at low counts. We investigate two classes of such models,
characterized by the following underlying production and decay chains: $gg \to
S\to A'A'\to (e^+e^-)(e^+e^-)$ and $q\bar q \to Z' \to sa\to (e^+e^-)(e^+e^-)$,
where at the first step a heavy scalar, $S$, or vector, $Z'$, resonances are
produced that decay to light metastable vectors, $A'$, or (pseudo-)scalars, $s$
and $a$. Setting the parameters of the models to explain the existing excess,
and taking the ATLAS detector geometry into account, we marginalize over the
properties of heavy resonances in order to derive the expected lifetimes and
couplings of metastable light resonances. We observe that in the case of $A'$,
the suggested range of masses and mixing angles $\epsilon$ is within reach of
several new-generation intensity frontier experiments.Comment: 38 pages, 7 figures, 2 tables, references adde
|
Diphoton Excess through Dark Mediators
|
diphoton excess through dark mediators
|
preliminary atlas encountered intriguing excess diphoton gev. excess decaying metastable displaced decays collimated pairs. decays pass successfully mimic diphoton counts. chains resonances metastable pseudo scalars excess atlas marginalize resonances derive lifetimes couplings metastable resonances. angles epsilon frontier pages tables adde
|
non_dup
|
[] |
42698709
|
10.1007/JHEP07(2016)064
|
Jet grooming algorithms are widely used in experimental analyses at hadron
colliders to remove contaminating radiation from within jets. While the
algorithms perform a great service to the experiments, their intricate
algorithmic structure and multiple parameters has frustrated precision
theoretic understanding. In this paper, we demonstrate that one particular
groomer called soft drop actually makes precision jet substructure easier. In
particular, we derive a factorization formula for a large class of soft drop
jet substructure observables, including jet mass. The essential observation
that allows for this factorization is that, without the soft wide-angle
radiation groomed by soft drop, all singular contributions are collinear. The
simplicity and universality of the collinear limit in QCD allows us to show
that to all orders, the normalized differential cross section has no
contributions from non-global logarithms. It is also independent of process, up
to the relative fraction of quark and gluon jets. In fact, soft drop allows us
to define this fraction precisely. The factorization theorem also explains why
soft drop observables are less sensitive to hadronization than their ungroomed
counterparts. Using the factorization theorem, we resum the soft drop jet mass
to next-to-next-to-leading logarithmic accuracy. This requires calculating some
clustering effects that are closely related to corresponding effects found in
jet veto calculations. We match our resummed calculation to fixed order results
for both $e^+e^-\to$ dijets and $pp\to Z+j$ events, producing the first jet
substructure predictions (groomed or ungroomed) to this accuracy for the LHC.Comment: 43 pages + appendices, 13 figures. v2: JHEP version, fixed minor
typo
|
Factorization for groomed jet substructure beyond the next-to-leading
logarithm
|
factorization for groomed jet substructure beyond the next-to-leading logarithm
|
grooming widely hadron colliders remove contaminating jets. great intricate algorithmic frustrated precision theoretic understanding. groomer drop precision substructure easier. derive factorization drop substructure observables mass. factorization groomed drop singular collinear. simplicity universality collinear orders logarithms. gluon jets. drop precisely. factorization explains drop observables hadronization ungroomed counterparts. factorization resum drop logarithmic accuracy. calculating clustering closely veto calculations. match resummed dijets producing substructure groomed ungroomed pages appendices figures. jhep minor typo
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non_dup
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[] |
42716310
|
10.1007/JHEP07(2016)065
|
We consider a BMS-type symmetry action on isolated horizons in asymptotically
flat spacetimes. From the viewpoint of the non-relativistic field theory on a
horizon membrane, supertranslations shift the field theory spatial momentum.
The latter is related by a Ward identity to the particle number symmetry
current and is spontaneously broken. The corresponding Goldstone boson shifts
the horizon angular momentum and can be detected quantum mechanically.
Similarly, area preserving superrotations are spontaneously broken on the
horizon membrane and we identify the corresponding gapless modes. In
asymptotically AdS spacetimes we study the BMS-type symmetry action on the
horizon in a holographic superfluid dual. We identify the horizon
supertranslation Goldstone boson as the holographic superfluid Goldstone mode.Comment: 17 pages; v2: added references, fixed typo
|
On the Membrane Paradigm and Spontaneous Breaking of Horizon BMS
Symmetries
|
on the membrane paradigm and spontaneous breaking of horizon bms symmetries
|
horizons asymptotically spacetimes. viewpoint relativistic horizon supertranslations momentum. ward spontaneously broken. goldstone boson shifts horizon mechanically. preserving superrotations spontaneously broken horizon gapless modes. asymptotically spacetimes horizon holographic superfluid dual. horizon supertranslation goldstone boson holographic superfluid goldstone pages typo
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non_dup
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[] |
42734327
|
10.1007/JHEP07(2016)066
|
We study the low energy effective action of the $\Omega$-deformed $\mathcal N
=2^{*}$ $SU(2) $ gauge theory. It depends on the deformation parameters
$\epsilon_{1},\epsilon_{2}$, the scalar field expectation value $a$, and the
hypermultiplet mass $m$. We explore the plane $(\frac{m}{\epsilon_{1}},
\frac{\epsilon_{2}}{\epsilon_{1}})$ looking for special features in the
multi-instanton contributions to the prepotential, motivated by what happens in
the Nekrasov-Shatashvili limit $\epsilon_{2}\to 0$. We propose a simple
condition on the structure of poles of the $k$-instanton prepotential and show
that it is admissible at a finite set of points in the above plane. At these
special points, the prepotential has poles at fixed positions independent on
the instanton number. Besides and remarkably, both the instanton partition
function and the full prepotential, including the perturbative contribution,
may be given in closed form as functions of the scalar expectation value $a$
and the modular parameter $q$ appearing in special combinations of Eisenstein
series and Dedekind $\eta$ function. As a byproduct, the modular anomaly
equation can be tested at all orders at these points. We discuss these special
features from the point of view of the AGT correspondence and provide explicit
toroidal 1-blocks in non-trivial closed form. The full list of solutions with
1, 2, 3, and 4 poles is determined and described in details.Comment: 25 pages, one pdf figure. v2: references adde
|
Exact partition functions for the $\Omega$-deformed $\mathcal N=2^{*}$
$SU(2)$ gauge theory
|
exact partition functions for the $\omega$-deformed $\mathcal n=2^{*}$ $su(2)$ gauge theory
|
omega deformed mathcal theory. deformation epsilon epsilon expectation hypermultiplet explore frac epsilon frac epsilon epsilon looking instanton prepotential motivated happens nekrasov shatashvili epsilon propose poles instanton prepotential admissible plane. prepotential poles instanton number. besides remarkably instanton partition prepotential perturbative expectation modular appearing combinations eisenstein dedekind function. byproduct modular anomaly orders points. correspondence toroidal blocks trivial form. poles pages figure. adde
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non_dup
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[] |
42682917
|
10.1007/JHEP07(2016)068
|
The Drell-Yan di-lepton production at hadron colliders is by far the
preferred channel to search for new heavy spin-1 particles. Traditionally, such
searches have exploited the Narrow Width Approximation (NWA) for the signal,
thereby neglecting the effect of the interference between the additional
Z'-bosons and the Standard Model Z and {\gamma}. Recently, it has been
established that both finite width and interference effects can be dealt with
in experimental searches while still retaining the model independent approach
ensured by the NWA. This assessment has been made for the case of popular
single Z'-boson models currently probed at the CERN Large Hadron Collider
(LHC). In this paper, we test the scope of the CERN machine in relation to the
above issues for some benchmark multi Z'-boson models. In particular, we
consider Non-Universal Extra Dimensional (NUED) scenarios and the 4-Dimensional
Composite Higgs Model (4DCHM), both predicting a multi-Z' peaking structure. We
conclude that in a variety of cases, specifically those in which the leptonic
decays modes of one or more of the heavy neutral gauge bosons are suppressed
and/or significant interference effects exist between these or with the
background, especially present when their decay widths are significant,
traditional search approaches based on the assumption of rather narrow and
isolated objects might require suitable modifications to extract the underlying
dynamics
|
Drell-Yan production of multi Z'-bosons at the LHC within Non-Universal
ED and 4D Composite Higgs Models
|
drell-yan production of multi z'-bosons at the lhc within non-universal ed and 4d composite higgs models
|
drell lepton hadron colliders preferred particles. traditionally searches exploited narrow thereby neglecting interference bosons gamma interference dealt searches retaining ensured nwa. popular boson probed cern hadron collider scope cern machine benchmark boson models. universal extra nued scenarios composite dchm predicting peaking structure. leptonic decays neutral bosons suppressed interference widths traditional narrow modifications extract
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non_dup
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