pinecone/core-2020-05-10-deduplication huggingface dataset:
Rescuing Complementarity With Little Drama

The AMPS paradox challenges black hole complementarity by apparently
constructing a way for an observer to bring information from the outside of the
black hole into its interior if there is no drama at its horizon, making
manifest a violation of monogamy of entanglement. We propose a new resolution
to the paradox: this violation cannot be explicitly checked by an infalling
observer in the finite proper time they have to live after crossing the
horizon. Our resolution depends on a weak relaxation of the no-drama condition
(we call it "little drama") which is the "complementarity dual" of scrambling
of information on the stretched horizon. When translated to the description of
the black hole interior, this implies that the fine-grained quantum information
of infalling matter is rapidly diffused across the entire interior while
classical observables and coarse-grained geometry remain unaffected. Under the
assumption that information has diffused throughout the interior, we consider
the difficulty of the information-theoretic task that an observer must perform
after crossing the event horizon of a Schwarzschild black hole in order to
verify a violation of monogamy of entanglement. We find that the time required
to complete a necessary subroutine of this task, namely the decoding of Bell
pairs from the interior and the late radiation, takes longer than the maximum
amount of time that an observer can spend inside the black hole before hitting
the singularity. Therefore, an infalling observer cannot observe monogamy
violation before encountering the singularity.Comment: 26 pages, 3 figures - v2: added references, small tweaks - v3:
  corrected typos to reflect final published versio
Leptoquark Flavor Patterns & B Decay Anomalies

Flavor symmetries that explain masses and mixings of the standard model
fermions dictate flavor patterns for the couplings of scalar and vector
leptoquarks to the standard model fermions. A generic feature is that couplings
to $SU(2)$-doublet leptons are suppressed at least by one spurion of the
discrete non-abelian symmetry breaking, responsible for neutrino mixing, while
couplings to charged lepton singlets can be order one. We obtain testable
patterns including those that predominantly couple to a single lepton flavor,
or two, or in a skewed way. They induce lepton non-universality, which we
contrast to current anomalies in $B$-decays. We find maximal effects in $R_{D}$
and $R_{D^*}$ at the level of $\sim$10 percent and few percent, respectively,
while leptoquark effects in $R_{K^{(*)}}$ can reach order few$\times 10$
percent. Predictions for charm and kaon decays and $\mu-e$ conversion are
worked out.Comment: 23 pages plus references and appendices, 2 figures, v2: typos fixed,
  clarifications and references added; conclusions unchange
Holographic non-Gaussianities in general single-field inflation

We use holographic techniques to compute inflationary non-Gaussianities for
general single-field inflation, including models with a non-trivial sound
speed. In this holographic approach, the inflationary dynamics is captured by a
relevant deformation of the dual conformal field theory (CFT) in the UV, while
the inflationary correlators are computed by conformal perturbation theory. In
this paper, we discuss the effects of higher derivative operators, such as
$(\partial_\mu\phi\partial^\mu\phi)^{m}$, which are known to induce a
non-trivial sound speed and source potentially large non-Gaussianities. We
compute the full inflationary bispectra from the deformed CFT correlators. We
also discuss the squeezed limit of the bispectra from the viewpoint of operator
product expansions. As is generic in the holographic description of inflation,
our power spectrum is blue tilted in the UV region. We extend our bispectrum
computation to the IR region by resumming the conformal perturbations to all
orders. We provide a self-consistent setup which reproduces a red tilted power
spectrum, as well as all possible bispectrum shapes in the slow-roll regime.Comment: 43 page
Exact partition functions for deformed $\mathcal{N}=2$ theories with
  $N_{f}=4$ flavours

We consider the $\Omega$-deformed $\mathcal{N}=2$ $SU(2)$ gauge theory in
four dimensions with $N_{f}=4$ massive fundamental hypermultiplets. The low
energy effective action depends on the deformation parameters $\varepsilon_{1},
\varepsilon_{2}$, the scalar field expectation value $a$, and the
hypermultiplet masses ${\bf m}=(m_{1}, m_{2}, m_{3}, m_{4})$. Motivated by
recent findings in the $\mathcal{N}=2^{*}$ theory, we explore the theories that
are characterized by special fixed ratios $\varepsilon_{2}/\varepsilon_{1}$ and
${\bf m}/\varepsilon_{1}$ and propose a simple condition on the structure of
the multi-instanton contributions to the prepotential determining the effective
action. This condition determines a finite set $\Pi_{N}$ of special points such
that the prepotential has $N$ poles at fixed positions independent on the
instanton number. In analogy with what happens in the $\mathcal{N}=2^{*}$ gauge
theory, the full prepotential of the $\Pi_{N}$ theories may be given in closed
form as an explicit function of $a$ and the modular parameter $q$ appearing in
special combinations of Eisenstein series and Jacobi theta functions with well
defined modular properties. The resulting finite pole partition functions are
related by AGT correspondence to special 4-point spherical conformal blocks of
the Virasoro algebra. We examine in full details special cases where the closed
expression of the block is known and confirms our Ansatz. We systematically
study the special features of Zamolodchikov's recursion for the $\Pi_{N}$
conformal blocks. As a result, we provide a novel effective recursion relation
that can be exactly solved and allows to prove the conjectured closed
expressions analytically in the case of the $\Pi_{1}$ and $\Pi_{2}$ conformal
blocks.Comment: 41 pages. v2: additional reference
Scattering amplitudes over finite fields and multivariate functional
  reconstruction

Several problems in computer algebra can be efficiently solved by reducing
them to calculations over finite fields. In this paper, we describe an
algorithm for the reconstruction of multivariate polynomials and rational
functions from their evaluation over finite fields. Calculations over finite
fields can in turn be efficiently performed using machine-size integers in
statically-typed languages. We then discuss the application of the algorithm to
several techniques related to the computation of scattering amplitudes, such as
the four- and six-dimensional spinor-helicity formalism, tree-level recursion
relations, and multi-loop integrand reduction via generalized unitarity. The
method has good efficiency and scales well with the number of variables and the
complexity of the problem. As an example combining these techniques, we present
the calculation of full analytic expressions for the two-loop five-point
on-shell integrands of the maximal cuts of the planar penta-box and the
non-planar double-pentagon topologies in Yang-Mills theory, for a complete set
of independent helicity configurations.Comment: 44 pages, 2 tables, 5 figures, published versio
Mordell-Weil Torsion in the Mirror of Multi-Sections

We give further evidence that genus-one fibers with multi-sections are mirror
dual to fibers with Mordell-Weil torsion. In the physics of F-theory
compactifications this implies a relation between models with a non-simply
connected gauge group and those with discrete symmetries. We provide a
combinatorial explanation of this phenomenon for toric hypersurfaces. In
particular this leads to a criterion to deduce Mordell-Weil torsion directly
from the polytope. For all 3134 complete intersection genus-one curves in
three-dimensional toric ambient spaces we confirm the conjecture by explicit
calculation. We comment on several new features of these models: The
Weierstrass forms of many models can be identified by relabeling the
coefficient sections. This reduces the number of models to 1024 inequivalent
ones. We give an example of a fiber which contains only non-toric sections one
of which becomes toric when the fiber is realized in a different ambient space.
Similarly a singularity in codimension one can have a toric resolution in one
representation while it is non-toric in another. Finally we give a list of 24
inequivalent genus-one fibers that simultaneously exhibit multi-sections and
Mordell-Weil torsion in the Jacobian. We discuss a self-mirror example from
this list in detail.Comment: 16 pages in two-column style, 12 figure
Forward di-jet production in p+Pb collisions in the small-x improved TMD
  factorization framework

We study the production of forward di-jets in proton-lead and proton-proton
collisions at the Large Hadron Collider. Such configurations, with both jets
produced in the forward direction, impose a dilute-dense asymmetry which allows
to probe the gluon density of the lead or proton target at small longitudinal
momentum fractions. Even though the jet momenta are always much bigger than the
saturation scale of the target, $Q_s$, the transverse momentum imbalance of the
di-jet system may be either also much larger than $Q_s$, or of the order $Q_s$,
implying that the small-$x$ QCD dynamics involved is either linear or
non-linear, respectively. The small-$x$ improved TMD factorization framework
deals with both situation in the same formalism. In the latter case, which
corresponds to nearly back-to-back jets, we find that saturation effects induce
a significant suppression of the forward di-jet azimuthal correlations in
proton-lead versus proton-proton collisions.Comment: 6 figure
Deforming super Riemann surfaces with gravitinos and super Schottky
  groups

The (super) Schottky uniformization of compact (super) Riemann surfaces is
briefly reviewed. Deformations of super Riemann surface by gravitinos and
Beltrami parameters are recast in terms of super Schottky group cohomology. It
is checked that the super Schottky group formula for the period matrix of a
non-split surface matches its expression in terms of a gravitino and Beltrami
parameter on a split surface. The relationship between (super) Schottky groups
and the construction of surfaces by gluing pairs of punctures is discussed in
an appendix.Comment: 46 pages, 6 figure
Universality in the Shape Dependence of Holographic R\'enyi Entropy for
  General Higher Derivative Gravity

We consider higher derivative gravity and obtain universal relations for the
shape coefficients $(f_a, f_b, f_c)$ of the shape dependent universal part of
the R\'enyi entropy for four dimensional CFTs in terms of the parameters $(c,
t_2, t_4)$ of two-point and three-point functions of stress tensors. As a
consistency check, these shape coefficients $f_a$ and $f_c$ satisfy the
differential relation as derived previously for the R\'enyi entropy.
Interestingly, these holographic relations also apply to weakly coupled
conformal field theories such as theories of free fermions and vectors but are
violated by theories of free scalars. The mismatch of $f_a$ for scalars has
been observed in the literature and is due to certain delicate boundary
contributions to the modular Hamiltonian. Interestingly, we find a combination
of our holographic relations which are satisfied by all free CFTs including
scalars. We conjecture that this combined relation is universal for general
CFTs in four dimensional spacetime. Finally, we find there are similar
universal laws for holographic R\'enyi entropy in general dimensions.Comment: 32 pages,0 figures, references added, appendix added, accepted for
  publication in JHE
Exclusive Weak Radiative Higgs Decays in the Standard Model and Beyond

We perform a detailed study of the exclusive Higgs decays $h\to MZ$ and $h\to
MW$, where $M$ is a pseudoscalar or vector meson, using the QCD factorization
approach. We allow for the presence of new-physics effects in the form of
modified Higgs couplings to gauge bosons and fermions, including the
possibility of flavor-changing Higgs couplings. We show that the decays $h\to
VZ$ exhibit a strong sensitivity to the effective CP-even and CP-odd $h\gamma
Z$ couplings. When combined with a measurement of the $h\to\gamma Z$ decay
rate, this can be used to extract these couplings up to a sign ambiguity in the
CP-odd coefficient. Some of the $h\to MW$ decay modes can be used to probe for
flavor-violating Higgs couplings involving the top quark.Comment: 17 pages plus appendix, 5 figures, 3 tables. v2: added discussion of
  EDM constraints, added references, matches version published in JHE
Soft factors for double parton scattering at NNLO

We show at NNLO that the soft factors for double parton scattering (DPS) for
both integrated and unintegrated kinematics, can be presented entirely in the
terms of the soft factor for single Drell-Yan process, i.e. the transverse
momentum dependent (TMD) soft factor. Using the linearity of the logarithm of
TMD soft factor in rapidity divergences, we decompose the DPS soft factor
matrices into a product of matrices with rapidity divergences in given sectors,
and thus, define individual double parton distributions at NNLO. The rapidity
anomalous dimension matrices for double parton distributions are presented in
the terms of TMD rapidity anomalous dimension. The analysis is done using the
generating function approach to web diagrams. Significant part of the result is
obtained from the symmetry properties of web diagrams without referring to
explicit expressions or a particular rapidity regularization scheme.
Additionally, we present NNLO expression for the web diagram generating
function for Wilson lines with two light-like directions.Comment: 31 page, 5 figures, structural update, version to be published in
  JHE
Phases of Cannibal Dark Matter

A hidden sector with a mass gap undergoes an epoch of cannibalism if number
changing interactions are active when the temperature drops below the mass of
the lightest hidden particle. During cannibalism, the hidden sector temperature
decreases only logarithmically with the scale factor. We consider the
possibility that dark matter resides in a hidden sector that underwent
cannibalism, and has relic density set by the freeze-out of two-to-two
annihilations. We identify three novel phases, depending on the behavior of the
hidden sector when dark matter freezes out. During the cannibal phase, dark
matter annihilations decouple while the hidden sector is cannibalizing. During
the chemical phase, only two-to-two interactions are active and the total
number of hidden particles is conserved. During the one way phase, the dark
matter annihilation products decay out of equilibrium, suppressing the
production of dark matter from inverse annihilations. We map out the distinct
phenomenology of each phase, which includes a boosted dark matter annihilation
rate, new relativistic degrees of freedom, warm dark matter, and observable
distortions to the spectrum of the cosmic microwave background.Comment: 26 pages plus appendix, 11 figures, minor changes to v
Non-Gaussianity as a Particle Detector

We study the imprints of massive particles with spin on cosmological
correlators. Using the framework of the effective field theory of inflation, we
classify the couplings of these particles to the Goldstone boson of broken time
translations and the graviton. We show that it is possible to generate
observable non-Gaussianity within the regime of validity of the effective
theory, as long as the masses of the particles are close to the Hubble scale
and their interactions break the approximate conformal symmetry of the
inflationary background. We derive explicit shape functions for the scalar and
tensor bispectra that can serve as templates for future observational searches.Comment: 55 pages, 10 figure
CGC factorization for forward particle production in proton-nucleus
  collisions at next-to-leading order

Within the Color Glass Condensate effective theory, we reconsider the
next-to-leading order (NLO) calculation of the single inclusive particle
production at forward rapidities in proton-nucleus collisions at high energy.
Focusing on quark production for definiteness, we establish a new factorization
scheme, perturbatively correct through NLO, in which there is no `rapidity
subtraction'. That is, the NLO correction to the impact factor is not
explicitly separated from the high-energy evolution. Our construction exploits
the skeleton structure of the (NLO) Balitsky-Kovchegov equation, in which the
first step of the evolution is explicitly singled out. The NLO impact factor is
included by computing this first emission with the exact kinematics for the
emitted gluon, rather than by using the eikonal approximation. This particular
calculation has already been presented in the literature [1,2], but the
reorganization of the perturbation theory that we propose is new. As compared
to the proposal in [1,2], our scheme is free of the fine-tuning inherent in the
rapidity subtraction, which might be the origin of the negativity of the NLO
cross-section observed in previous studies.Comment: 54 pages, 17 pages. Substantial revision, the next-to-leading order
  evolution of the dipole amplitude fully included, main conclusions unchanged.
  Final version, to appear in JHE
Damping of hard excitations in strongly coupled $\mathcal N\,{=}\,4$
  plasma

The damping of high momentum excitations in strongly coupled maximally
supersymmetric Yang-Mills plasma is studied. Previous calculations of the
asymptotic behavior of the quasinormal mode spectrum are extended and
clarified. We confirm that subleading corrections to the lightlike dispersion
relation $\omega({\bf q}) = |{\bf q}|$ have a universal $|{\bf q}|^{-1/3}$
form. Sufficiently narrow, weak planar shocks may be viewed as coherent
superpositions of short wavelength quasinormal modes. The attenuation and
evolution in profile of narrow planar shocks are examined as an application of
our results.Comment: 29 pages, 9 figure
The coupling of Poisson sigma models to topological backgrounds

We extend the coupling to the topological backgrounds, recently worked out
for the 2-dimensional BF-model, to the most general Poisson sigma models. The
coupling involves the choice of a Casimir function on the target manifold and
modifies the BRST transformations. This in turn induces a change in the BRST
cohomology of the resulting theory. The observables of the coupled theory are
analyzed and their geometrical interpretation is given. We finally couple the
theory to 2-dimensional topological gravity: this is the first step to study a
topological string theory in propagation on a Poisson manifold. As an
application, we show that the gauge-fixed vectorial supersymmetry of the
Poisson sigma models has a natural explanation in terms of the theory coupled
to topological gravity.Comment: 31 pages; v2: typos fixed, references added, version to appear in
  JHE
T-system on T-hook: Grassmannian Solution and Twisted Quantum Spectral
  Curve

We propose an efficient grassmannian formalism for solution of bi-linear
finite-difference Hirota equation (T-system) on T-shaped lattices related to
the space of highest weight representations of $gl(K_1,K_2|M)$ superalgebra.
The formalism is inspired by the quantum fusion procedure known from the
integrable spin chains and is based on exterior forms of Baxter-like
Q-functions. We find a few new interesting relations among the exterior forms
of Q-functions and reproduce, using our new formalism, the Wronskian
determinant solutions of Hirota equations known in the literature. Then we
generalize this construction to the twisted Q-functions and demonstrate the
subtleties of untwisting procedure on the examples of rational quantum spin
chains with twisted boundary conditions. Using these observations, we
generalize the recently discovered, in our paper with N. Gromov, AdS/CFT
Quantum Spectral Curve for exact planar spectrum of AdS/CFT duality to the case
of arbitrary Cartan twisting of AdS$_5\times$S$^5$ string sigma model. Finally,
we successfully probe this formalism by reproducing the energy of gamma-twisted
BMN vacuum at single-wrapping orders of weak coupling expansion.Comment: 122 pages, 14 figure
Distinguishing Standard Model Extensions using Monotop Chirality at the
  LHC

We present two minimal extensions of the standard model, each giving rise to
baryogenesis. They include heavy color-triplet scalars interacting with a light
Majorana fermion that can be the dark matter (DM) candidate. The electroweak
charges of the new scalars govern their couplings to quarks of different
chirality, which leads to different collider signals. These models predict
monotop events at the LHC and the energy spectrum of decay products of highly
polarized top quarks can be used to establish the chiral nature of the
interactions involving the heavy scalars and the DM. Detailed simulation of
signal and standard model background events is performed, showing that top
quark chirality can be distinguished in hadronic and leptonic decays of the top
quarks.Comment: 7 pages, 7 figures, 3 tables. New authors added; Standard model
  background analysis and model discrimination prospects include
Collisions of massive particles, timelike thin shells and formation of
  black holes in three dimensions

We study collisions of massive pointlike particles in three dimensional
anti-de Sitter space, generalizing the work on massless particles in [1]. We
show how to construct exact solutions corresponding to the formation of either
a black hole or a conical singularity from the collision of an arbitrary number
of massive particles that fall in radially and collide at the origin of AdS. No
restrictions on the masses or the angular and radial positions from where the
particles are released, are imposed. We also consider the limit of an infinite
number of particles, obtaining novel timelike thin shell spacetimes. These thin
shells have an arbitrary mass distribution as well as a non-trivial embedding
where the radial location of the shell depends on the angular coordinate, and
we analyze these shells using the junction formalism of general relativity. We
also consider the massless limit and find consistency with earlier results, as
well as comment on the stress-energy tensor modes of the dual CFT.Comment: 61 pages, 9 figures; v2: typos, references adde
Thermodynamics and CP-odd transport in Holographic QCD with Finite
  Magnetic Field

We consider a bottom-up holographic model of QCD at finite temperature T and
magnetic field B, and study dependence of thermodynamics and CP-odd transport
on these variables. As the magnetic field couples to the flavor sector only,
one should take the Veneziano limit where the number of flavors and colors are
large while their ratio is kept fixed. We investigate the corresponding
holographic background in the approximation where the ratio of flavors to
colors is finite but small. We demonstrate that B-dependence of the entropy of
QCD is in qualitative agreement with the recent lattice studies. Finally we
study the CP-odd transport properties of this system. In particular, we
determine the Chern-Simons decay rate at finite B and T, that is an important
ingredient in the Chiral Magnetic Effect.Comment: 24 pages, 3 Figure
Spin-2 spectrum of six-dimensional field theories

We analyze the mass spectrum of spin-2 excitations around the gravity duals
of "linear quiver" supersymmetric conformal field theories (SCFT's) in six
dimensions. We show that for the entire family of gravity solutions it
satisfies a bound which corresponds to a unitarity bound for the scaling
dimension of the dual field theory operators. We determine the masses of
excitations which belong to short multiplets, and for certain gravity solutions
we obtain the Kaluza-Klein modes and the corresponding mass spectrum, fully and
explicitly. Finally, we discuss an intuitive picture of the dual operators in
terms of the effective descriptions of the SCFT's.Comment: 29 pages; v2: minor changes, references adde