pinecone/core-2020-05-10-deduplication huggingface dataset:
A new spin on entanglement entropy

We argue that the usual notions of thermodynamic and entanglement entropy
have novel analogs in the context of higher spin theories. In particular, the
Wald and Ryu-Takayanagi formulas have natural higher spin extensions that we
work out and study. On the CFT side, just as standard entanglement entropy in
CFT_2 can be computed from twist field correlators, we demonstrate that by
introducing corresponding operators carrying higher spin charge we can
precisely reproduce our results from the bulk.
  We also show that the first law for entanglement entropy implies the
linearized field equations for the metric and higher spin fields, generalizing
recent work on deriving the linearized Einstein equations from the first law.Comment: 39 page
h → Zγ in the complex two Higgs doublet model

The latest LHC data confirmed the existence of a Higgs-like particle and made interesting measurements on its decays into γγ , ZZ * , W W * , τ + τ − , and b b ¯ $$ b\overline{b} $$ . It is expected that a decay into Zγ might be measured at the next LHC round, for which there already exists an upper bound. The Higgs-like particle could be a mixture of scalar with a relatively large component of pseudoscalar. We compute the decay of such a mixed state into Zγ , and we study its properties in the context of the complex two Higgs doublet model, analysing the effect of the current measurements on the four versions of this model. We show that a measurement of the h → Zγ rate at a level consistent with the SM can be used to place interesting constraints on the pseudoscalar component. We also comment on the issue of a wrong sign Yukawa coupling for the bottom in Type II models
Supersymmetric Rényi entropy in five dimensions

We introduce supersymmetric Rényi entropies for N $$ \mathcal{N} $$ = 1 supersymmetric gauge theories in five dimensions. The matrix model representation is obtained using the localization method and the large- N behavior is studied. The gravity dual is a supersymmetric charged topological AdS 6 black hole in the Romans F (4) supergravity. The variation of the supersymmetric Rényi entropy due to the insertion of a BPS Wilson loop is computed. We find perfect agreements between the large- N and the dual gravity computations both with and without the Wilson loop operator
Global fits to b → s ℓℓ data and signs for lepton non-universality

There are some slight tensions with the SM predictions within the latest LHCb measurements. Besides the known anomaly in one angular observable of the rare decay B → K * μ + μ − , another small discrepancy recently occurred. The ratio R K = BR( B + → K + μ + μ − ) / BR( B + → K + e + e − ) in the low- q 2 region has been measured by LHCb showing a 2 . 6 σ deviation from the SM prediction. In contrast to the anomaly in the rare decay B → K * μ + μ − which is affected by power corrections, the ratio R K is theoretically rather clean. We analyse all the b → sℓℓ data with global fits and in particular explore the possibility of breaking of lepton universality. Possible cross-checks with an analysis of the inclusive B → X s ℓ + ℓ − decay are also explored
Black holes and the double copy

Recently, a perturbative duality between gauge and gravity theories (the double copy) has been discovered, that is believed to hold to all loop orders. In this paper, we examine the relationship between classical solutions of non-Abelian gauge theory and gravity. We propose a general class of gauge theory solutions that double copy to gravity, namely those involving stationary Kerr-Schild metrics. The Schwarzschild and Kerr black holes (plus their higher-dimensional equivalents) emerge as special cases. We also discuss plane wave solutions. Furthermore, a recently examined double copy between the self-dual sectors of Yang-Mills theory and gravity can be reinterpreted using a momentum-space generalisation of the Kerr-Schild framework
N = 2 Born-Infeld attractors

We derive new types of U(1) n Born-Infeld actions based on N = 2 special geometry in four dimensions. As in the single vector multiplet ( n = 1) case, the non-linear actions originate, in a particular limit, from quadratic expressions in the Maxwell fields. The dynamics is encoded in a set of coefficients d ABC related to the third derivative of the holomorphic prepotential and in an SU(2) triplet of N = 2 Fayet-Iliopoulos charges, which must be suitably chosen to preserve a residual N = 1 supersymmetry
Thermodynamics of Lifshitz black holes

We specialize the Wald formalism to derive the thermodynamical first law for static black holes with spherical/torus/hyperbolic symmetries in a variety of supergravities or supergravity-inspired theories involving multiple scalars and vectors. We apply the formula to study the first law of a general class of Lifshitz black holes. We analyse the first law of three exact Lifshitz black holes and the results fit the general pattern. In one example, the first law is TdS + Φ dQ = 0 where (Φ , Q ) are the electric potential and charge of the Maxwell field. The unusual vanishing of mass in this specific solution demonstrates that super-extremal charged black holes can exist in asymptotic Lifshitz spacetimes
Suppression of ψ(2S) production in p-Pb collisions at sNN−−−√\ud
= 5.02 TeV

The ALICE Collaboration has studied the inclusive production of the charmonium state ψ(2S) in proton-lead (p-Pb) collisions at the nucleon-nucleon centre of mass energy sNN−−−√ = 5.02 TeV at the CERN LHC. The measurement was performed at forward (2.03 < y cms < 3.53) and backward (−4.46 < y cms < −2.96) centre of mass rapidities, studying the decays into muon pairs. In this paper, we present the inclusive production cross sections σ ψ(2S), both integrated and as a function of the transverse momentum p T, for the two y cms domains. The results are compared to those obtained for the 1S vector state (J/ψ), by showing the ratios between the production cross sections, as well as the double ratios [σ ψ(2S) /σ J/ψ ]pPb /[σ ψ(2S) /σ J/ψ ]pp between p-Pb and proton-proton collisions. Finally, the nuclear modification factor for inclusive ψ(2S) is evaluated and compared to the measurement of the same quantity for J/ψ and to theoretical models including parton shadowing and coherent energy loss mechanisms. The results show a significantly larger suppression of the ψ(2S) compared to that measured for J/ψ and to models. These observations represent a clear indication for sizeable final state effects on ψ(2S) production
Harmonic forms on ALF gravitational instantons

We study the space of square-integrable harmonic forms over ALF gravitational instantons of type A K −1 and of type D K . We first calculate its dimension making use of a result by Hausel, Hunsicker and Mazzeo which relates the Hodge cohomology of a gravitational instanton M to the singular cohomology of a particular compactification X M of M . We then exhibit an explicit basis, exact for A K −1 and approximate for D K , and interpret geometrically the relations between M , X M and their cohomologies
Gravity dual of spin and charge density waves

At high enough charge density, the homogeneous state of the D3-D7' model is
unstable to fluctuations at nonzero momentum. We investigate the end point of
this instability, finding a spatially modulated ground state, which is a charge
and spin density wave. We analyze the phase structure of the model as a
function of chemical potential and magnetic field and find the phase transition
from the homogeneous state to be first order, with a second-order critical
point at zero magnetic field.Comment: 26 pages, 16 figures; v2: refs. fixed and added; v3: refs. and
  discussion added, published versio
Holographic D3-probe-D5 model of a double layer Dirac semimetal

The possibility of inter-layer exciton condensation in a holographic D3-probe-D5 brane model of a strongly coupled double monolayer Dirac semi-metal in a magnetic field is studied in detail. It is found that, when the charge densities on the layers are exactly balanced so that, at weak coupling, the Fermi surfaces of electrons in one monolayer and holes in the other monolayer would be perfectly nested, inter-layer condensates can form for any separation of the layers. The case where both monolayers are charge neutral is special. There, the inter-layer condensate occurs only for small separations and is replaced by an intra-layer exciton condensate at larger separations. The phase diagram for charge balanced monolayers for a range layer separations and chemical potentials is found. We also show that, in semi-metals with multiple species of massless fermions, the balance of charges required for Fermi surface nesting can occur spontaneously by breaking some of the internal symmetry of the monolayers. This could have important consequences for experimental attempts to find inter-layer condensates
Prospects for electroweakino discovery at a 100 TeV hadron collider

We investigate the prospects of discovering split Supersymmetry at a future 100 TeV proton-proton collider through the direct production of electroweakino next-to-lightest- supersymmetric-particles (NLSPs). We focus on signatures with multi-lepton and missing energy: 3ℓ, opposite-sign dileptons and same-sign dileptons. We perform a comprehensive study of different electroweakino spectra. A 100 TeV collider with 3000 / fb data is expected to exclude Higgsino thermal dark matter candidates with m LSP ~ 1 TeV if Wino NLSPs are lighter than about 3.2 TeV. The 3ℓ search usually offers the highest mass reach, which varies in the range of (2–4) TeV depending on scenarios. In particular, scenarios with light Higgsinos have generically simplified parameter dependences. We also demonstrate that, at a 100 TeV collider, lepton collimation becomes a crucial issue for NLSPs heavier than about 2.5 TeV. We finally compare our results with the discovery prospects of gluino pair productions and deduce which SUSY breaking model can be discovered first by electroweakino searches
On Form Factors in N=4 SYM Theory and Polytopes

In this paper we discuss different recursion relations (BCFW and all-line
shift) for the form factors of the operators from the $\mathcal{N}=4$ SYM
stress-tensor current supermultiplet $T^{AB}$ in momentum twistor space. We
show that cancelations of spurious poles and equivalence between different
types of recursion relations can be naturally understood using geometrical
interpretation of the form factors as special limit of the volumes of polytopes
in $\mathbb{C}\mathbb{P}^4$ in close analogy with the amplitude case. We also
show how different relations for the IR pole coefficients can be easily derived
using momentum twistor representation. This opens an intriguing question -
which of powerful on-shell methods and ideas can survive off-shell ?Comment: 46 pages, 16 figures; v3: minor changes, typos in 3.37 and footnote 6
  correcte
Compactified N = 1 supersymmetric Yang-Mills theory on the lattice: continuity and the disappearance of the deconfinement transition

Fermion boundary conditions play a relevant role in revealing the confinement mechanism of N=1 supersymmetric Yang-Mills theory with one compactified space-time dimension. A deconfinement phase transition occurs for a sufficiently small compactification radius, equivalent to a high temperature in the thermal theory where antiperiodic fermion boundary conditions are applied. Periodic fermion boundary conditions, on the other hand, are related to the Witten index and confinement is expected to persist independently of the length of the compactified dimension. We study this aspect with lattice Monte Carlo simulations for different values of the fermion mass parameter that breaks supersymmetry softly. We find a deconfined region that shrinks when the fermion mass is lowered. Deconfinement takes place between two confined regions at large and small compactification radii, that would correspond to low and high temperatures in the thermal theory. At the smallest fermion masses we find no indication of a deconfinement transition. These results are a first signal for the predicted continuity in the compactification of supersymmetric Yang-Mills theory
Holographical description of BPS Wilson loops in flavored ABJM theory

As holographic description of BPS Wilson loops in N = 3 $$ \mathcal{N}=3 $$ flavored ABJM theory with N f = k = 1, BPS M2-branes in AdS 4 × N (1 , 1) are studied in details. Two 1 / 3-BPS membrane configurations are found. One of them is dual to the 1 / 3-BPS Wilson loop of Gaiotto-Yin type. The regulated membrane action captures precisely the leading exponential behavior of the vacuum expectation values of 1 / 3-BPS Wilson loops in the strong coupling limit, which was computed before using supersymmetric localization technique. Moreover, there is no BPS membrane with more supersymmetries in the background, under quite natural assumption on the membrane worldvolume. This suggests that there is no Wilson loop preserving more than 1/3 supersymmetries in such flavored ABJM theory
$c-a$ from the $N=1$ superconformal index

We present a prescription for obtaining the difference of the central
charges, c-a, of a four dimensional superconformal quantum field theory from
its single-trace index. The formula is derived from a one-loop holographic
computation, but is expected to be valid independent of holography. We
demonstrate the prescription with several holographic and non-holographic
examples. As an application of our formula, we show the AdS/CFT matching of c-a
for arbitrary toric quiver CFTs without adjoint matter that are dual to smooth
Sasaki-Einstein 5-manifolds.Comment: 19 pages. v2: minor changes, reference added. v3: minor
  clarifications, published version. v4: a typo in Table 2 fixe
Charged Higgs search via AW ± /HW ± channel

Models of electroweak symmetry breaking with extended Higgs sectors are theoretically well motivated. In this study, we focus on models with a low energy spectrum containing a pair of charged scalars H ± , as well as a light scalar H and/or a pseudoscalar A . We study the H ± tb associated production with H ± → AW ± /HW ± , which could reach sizable branching fractions in certain parameter regions. With detailed collider analysis, we obtain the exclusion bounds as well as discovery reach at the 14 TeV LHC for the process pp → H ± tb → AW ± tb/HW ± tb → ττbbWW, bbbbWW . We find that for a daughter particle mass of 70 GeV, the 95% C.L. exclusion reach in σ × BR varies from about 60 fb to 25 fb, for m H ± ranging from 150 GeV to 500 GeV with 300 fb −1 integrated luminosity in the τ τ mode. We further interpret these bounds in the context of Type II Two Higgs Doublet Model. The exclusion region in the m H ± − tan β plane can be extended to m H ± = 600 GeV, while discovery is possible for m H ± ≲ 400 GeV with 300 fb −1 integrated luminosity. The exotic decay mode H ± → AW ± /HW ± offers a complementary channel to the conventional mode H ± → τν for charged Higgs searches
Holographic fermionic system with dipole coupling on Q-lattice

We construct a holographic model for a fermionic system on Q-lattice and compute the spectral function in the presence of a dipole coupling. Both key features of doped Mott insulators, the dynamical generation of a gap and spectral weight transfer, are observed when adjusting the value of the coupling parameter p . Of particular interest is that when the background is in a deep insulating phase, the Mott gap opens much easier with a smaller coupling parameter in comparison with a metallic background. The effects of lattice parameters on the width of the gap Δ /μ are studied and a turning point is observed near the critical regime of metal-insulator transitions of the background. Furthermore, the temperature dependence of the spectral function is studied. Finally, we also observe that the anisotropic Q-lattice generates anisotropic peaks with different magnitudes, indicating that insulating and metallic phases arise in different directions
Inflation from Minkowski space

We propose a class of scalar models that, once coupled to gravity, lead to cosmologies that smoothly and stably connect an inflationary quasi-de Sitter universe to a low, or even zero-curvature, maximally symmetric spacetime in the asymptotic past, strongly violating the null energy condition H ⋅ ≫ H 2 $$ \left(\overset{\cdot }{H}\gg {H}^2\right) $$ at intermediate times. The models are deformations of the conformal galileon lagrangian and are therefore based on symmetries, both exact and approximate, that ensure the quantum robustness of the whole picture. The resulting cosmological backgrounds can be viewed as regularized extensions of the galilean genesis scenario, or, equivalently, as ‘early-time-complete’ realizations of inflation. The late-time inflationary dynamics possesses phenomenologically interesting properties: it can produce a large tensor-to-scalar ratio within the regime of validity of the effective field theory and can lead to sizeable equilateral nongaussianities
Cycles of interactions in multi-gravity theories

In this paper we study multi-gravity (multi-metric and multi-vielbein) theories in the presence of cycles of interactions (cycles in the so-called ‘theory graph’). It has been conjectured that in multi-metric theories such cycles lead to the introduction of a ghost-like instability, which, however, is absent in the multi-vielbein version of such theories. In this paper we answer this question in the affirmative by explicitly demonstrating the presence of the ghost in such multi-metric theories in the form of dangerous higher derivative terms in the decoupling limit Lagrangian; we also investigate the structure of interactions in the vielbein version of these theories and argue why the same ghost does not appear there. Finally we discuss the ramifications of our result on the dimensional deconstruction paradigm, which would seek an equivalence between such theories and a truncated Kaluza-Klein theory, and find that the impediment to taking the continuum limit due to a low strong-coupling scale is exacerbated by the presence of the ghost, when these theories are constructed using metrics
Holographic interpolation between a and F

An interpolating function F ˜ $$ \tilde{F} $$ between the a -anomaly coefficient in even dimensions and the free energy on an odd-dimensional sphere has been proposed recently and is conjectured to monotonically decrease along any renormalization group flow in continuous dimension d . We examine F ˜ $$ \tilde{F} $$ in the large- N CFT’s in d dimensions holographically described by the Einstein-Hilbert gravity in the AdS d +1 space. We show that F ˜ $$ \tilde{F} $$ is a smooth function of d and correctly interpolates the a coefficients and the free energies. The monotonicity of F ˜ $$ \tilde{F} $$ along an RG flow follows from the analytic continuation of the holographic c -theorem to continuous d , which completes the proof of the conjecture
More on BPS States in N=4 Supersymmetric Yang-Mills Theory on R x S3

We perform a systematic analysis on supersymmetric states in N=4
supersymmetric Yang-Mills theory (SYM) on R x S^3. We find a new set of 1/16
BPS equations and determine the precise configuration of the supersymmetric
states by solving all 1/16 BPS equations when they are valued in Cartan
subalgebra of a gauge group and the fermionic fields vanish. We also determine
the number of supersymmetries preserved by the supersymmetric states varying
the parameters of the BPS solutions. As a byproduct we present the complete set
of such supersymmetric states in N=8 SYM on R x S^2 by carrying out dimensional
reduction.Comment: 37 pages, v2: typos corrected, comments and Acknowledgements adde
Spacetimes for λ -deformations

We examine a recently proposed class of integrable deformations to two-dimensional conformal field theories. These λ -deformations interpolate between a WZW model and the non-Abelian T-dual of a Principal Chiral Model on a group G or, between a G/H gauged WZW model and the non-Abelian T-dual of the geometric coset G/H. λ -deformations have been conjectured to represent quantum group q -deformations for the case where the deformation parameter is a root of unity. In this work we show how such deformations can be given an embedding as full string backgrounds whose target spaces satisfy the equations of type-II supergravity. One illustrative example is a deformation of the S l 2 ℝ / U 1 $$ \mathrm{S}\mathrm{l}\left(2,\mathrm{\mathbb{R}}\right)/\mathrm{U}(1) $$ black-hole CFT. A further example interpolates between the S U 2 × S U 2 S U 2 × S L 2 ℝ × S L 2 ℝ S L 2 ℝ U 1 4 $$ \frac{\mathrm{SU}(2)\times \mathrm{S}\mathrm{U}(2)}{\mathrm{SU}(2)}\times \frac{\mathrm{SL}\left(2,\mathrm{\mathbb{R}}\right)\times \mathrm{S}\mathrm{L}\left(2,\mathrm{\mathbb{R}}\right)}{\mathrm{SL}\left(2,\mathrm{\mathbb{R}}\right)}\mathrm{U}{(1)}^4 $$ gauged WZW model and the non-Abelian T-dual of AdS 3 × S 3 × T 4 supported with Ramond flux
Large N Chern-Simons with massive fundamental fermions - A model with no
  bound states

In a previous paper, we analyzed the theory of massive fermions in the
fundamental representation coupled to a U(N) Chern-Simons gauge theory in three
dimensions at level K. It was done in the large N, large K limits where
Lambda=N/K was kept fixed. Among other results, we showed there that there are
no high mass quark anti-quark bound states. Here we show that there are no
bound states at all.Comment: 14 pages, 2 figures. arXiv admin note: substantial text overlap with
  arXiv:1306.6465. A reference and acknowledgement adde
A class of invisible axion models with FCNCs at tree level

We build a class of invisible axion models with tree-level Flavor Changing Neutral Currents completely controlled by the fermion mixing matrices. The scalar sector of these models contains three-Higgs doublets and a complex scalar gauge singlet, with the same fermionic content as in the Standard Model. A horizontal Peccei-Quinn symmetry provides a solution to the strong CP problem and predicts the existence of a very light and weakly coupled pseudo-Goldstone boson, the invisible axion or familon. A phenomenological analysis is performed taking into account familon searches in rare kaon and muon decays, astrophysical considerations and axion searches via axion-photon conversion. Drastic differences are found in the axion properties of different models due to the strong hierarchy of the CKM matrix, making some of the models considered much more constrained than others. We also obtain that a rich variety of these models avoid the domain wall problem. A possible mechanism to protect the solution to the strong CP problem against gravitational effects is also discussed
On a Gopakumar-Vafa form of partition function of Chern-Simons theory on classical and exceptional lines

We show that partition function of Chern-Simons theory on three-sphere with classical and exceptional groups (actually on the whole corresponding lines in Vogel’s plane) can be represented as ratio of respectively triple and double sine functions (last function is essentially a modular quantum dilogarithm). The product representation of sine functions gives Gopakumar-Vafa structure form of partition function, which in turn gives a corresponding integer invariants of manifold after geometrical transition. In this way we suggest to extend gauge/string duality to exceptional groups, although one still have to resolve few problems. In both classical and exceptional cases an additional terms, non-perturbative w.r.t. the string coupling constant, appear. The full universal partition function of ChernSimons theory on three-sphere is shown to be the ratio of quadruple sine functions. We also briefly discuss the matrix model for exceptional line