pinecone/core-2020-05-10-deduplication huggingface dataset:
Weyl Action of Two-Column Mixed-Symmetry Field and Its Factorization
  Around (A)dS Space

We investigate the four-derivative free Weyl action for two-column
mixed-symmetry field that makes use of maximal gauge symmetries. In flat space,
the action can be uniquely determined from gauge and Weyl (trace shift)
symmetry requirements. We show that there is a smooth and unique deformation of
the flat action to (A)dS which keeps the same amount of gauge symmetries. This
action admits a factorization into two distinct two-derivative actions having
gauge parameters of different Young diagrams. Hence, this factorization pattern
naturally extends that of the Weyl actions of symmetric higher spin fields to
mixed-symmetry cases. The mass-deformation for these actions can be realized
preserving one of the gauge symmetries. Although generically non-unitary, in
special dimensions, unitarity is achieved selecting different mass deformations
for dS and AdS. We consider particular examples of our construction such as New
Massive Gravity in three dimensions, linearized bigravity in four dimensions
and their arbitrary dimensional generalizations.Comment: 25 pages, minor corrections, references added, version published in
  JHE
More on analytic bootstrap for O(N) models

This note is an extension of a recent work on the analytical bootstrapping of
$O(N)$ models. An additonal feature of the $O(N)$ model is that the OPE
contains trace and antisymmetric operators apart from the symmetric-traceless
objects appearing in the OPE of the singlet sector. This in addition to the
stress tensor $(T_{\mu\nu})$ and the $\phi_i\phi^i$ scalar, we also have other
minimal twist operators as the spin-1 current $J_\mu$ and the
symmetric-traceless scalar in the case of $O(N)$. We determine the effect of
these additional objects on the anomalous dimensions of the corresponding
trace, symmetric-traceless and antisymmetric operators in the large spin sector
of the $O(N)$ model, in the limit when the spin is much larger than the twist.
As an observation, we also verified that the leading order results for the
large spin sector from the $\epsilon-$expansion are an exact match with our
$n=0$ case. A plausible holographic setup for the special case when $N=2$ is
also mentioned which mimics the calculation in the CFT.Comment: 23 pages, 1 figure. v2: Minor changes. Accepted for publication in
  JHE
Correlation functions with fusion-channel multiplicity in W3 Toda field
  theory

Current studies of WN Toda field theory focus on correlation functions such
that the WN highest-weight representations in the fusion channels are
multiplicity-free. In this work, we study W3 Toda 4-point functions with
multiplicity in the fusion channel. The conformal blocks of these 4-point
functions involve matrix elements of a fully-degenerate primary field with a
highest-weight in the adjoint representation of sl3, and a semi-degenerate
primary field with a highest-weight in the fundamental representation of sl3.
We show that, when the fusion rules are obeyed, the matrix elements of the
fully-degenerate adjoint field, between two arbitrary descendant states, can be
computed explicitly, on equal footing with the matrix elements of the
semi-degenerate fundamental field. Using null-state conditions, we obtain a
fourth-order Fuchsian differential equation for the conformal blocks. Using
Okubo theory, we show that, due to the presence of multiplicities, this
differential equation belongs to a class of Fuchsian equations that is
different from those that have appeared so far in WN theories. We solve this
equation, compute its monodromy group, and construct the monodromy-invariant
correlation functions.Comment: 44 pages, v2 =published versio
Phase space analysis of bulk viscous matter dominated universe

We consider a Friedmann model of the universe with bulk viscous matter and
radiation as the cosmic components. We study the asymptotic properties in the
equivalent phase space by considering the three cases for the bulk viscous
coefficient as (i) $\zeta = \zeta_{0}$, a constant (ii) $\zeta = \zeta_{0} +
\zeta_{1}\frac{\dot{a}}{a}$, depending on velocity of the expansion of the
universe and (iii) $\zeta = \zeta_{0} + \zeta_{1}\frac{\dot{a}}{a} +
\zeta_{2}\frac{\ddot{a}}{\dot{a}}$, depending both on velocity and acceleration
of the expansion of the universe. It is found that all the three cases predicts
the late acceleration of the universe. However, a conventional realistic
behaviour of the universe, i.e., a universe having an initial radiation
dominated phase and then followed by decelerated matter dominated phase and
then finally evolving to accelerated epoch, is shown only when $\zeta =
\zeta_{0}$, a constant. For the other two cases, it does not show either a
prior conventional radiation dominated phase or a matter dominated phase of the
universe.Comment: 22 pages and 3 figure
Phases of Global AdS Black Holes

We study the phases of gravity coupled to a charged scalar and gauge field in
an asymptotically Anti-de Sitter spacetime ($AdS_4$) in the grand canonical
ensemble. For the conformally coupled scalar, an intricate phase diagram is
charted out between the four relevant solutions: global AdS, boson star,
Reissner-Nordstrom black hole and the hairy black hole. The nature of the phase
diagram undergoes qualitative changes as the charge of the scalar is changed,
which we discuss. We also discuss the new features that arise in the extremal
limit.Comment: 17 pages, 8 figures, Appendix adde
Left-Right Symmetry and Lepton Number Violation at the Large Hadron
  Electron Collider

We show that the proposed Large Hadron electron Collider (LHeC) will provide
an opportunity to search for left-right symmetry and establish lepton number
violation, complementing current and planned searches based on LHC data and
neutrinoless double beta decay. We consider several plausible configurations
for the LHeC -- including different electron energies and polarizations, as
well as distinct values for the charge misidentification rate. Within
left-right symmetric theories we determine the values of right-handed neutrino
and gauge boson masses that could be tested at the LHeC after one, five and ten
years of operation. Our results indicate that this collider might probe, via
the $\Delta L =2$ signal $e^-p\to e^+jjj$, Majorana neutrino masses up to 1 TeV
and $W_R$ masses up to 6.5 TeV. Interestingly, part of this parameter space is
beyond the expected reach of the LHC and of future neutrinoless double beta
decay experiments.Comment: 22 pages, 6 figures. Matches version published in JHE
Phase structure of a holographic double monolayer Dirac semimetal

We study a holographic D3/probe-D5-brane model of a double monolayer Dirac
semimetal in a magnetic field and in the presence of a nonzero temperature.
Intra- and inter-layer exciton condensates can form by varying the balanced
charge density on the layers, the spatial separation and the temperature.
Constant temperature phase diagrams for a wide range of layer separations and
charge densities are found. The presence of a finite temperature makes the
phase diagrams extremely rich and in particular leads to the appearance of a
symmetric phase which was missing at zero temperature.Comment: 25 pages, 21 figures, references adde
A to Z of the Muon Anomalous Magnetic Moment in the MSSM with Pati-Salam
  at the GUT scale

We analyse the low energy predictions of the minimal supersymmetric standard
model (MSSM) arising from a GUT scale Pati-Salam gauge group further
constrained by an $A_4 \times Z_5$ family symmetry, resulting in four soft
scalar masses at the GUT scale: one left-handed soft mass $m_0$ and three
right-handed soft masses $m_1,m_2,m_3$, one for each generation. We demonstrate
that this model, which was initially developed to describe the neutrino sector,
can explain collider and non-collider measurements such as the dark matter
relic density, the Higgs boson mass and, in particular, the anomalous magnetic
moment of the muon $(g-2)_\mu$. Since about two decades, $(g-2)_\mu$ suffers a
puzzling about 3$\,\sigma$ excess of the experimentally measured value over the
theoretical prediction, which our model is able to fully resolve. As the
consequence of this resolution, our model predicts specific regions of the
parameter space with the specific properties including light smuons and
neutralinos, which could also potentially explain di-lepton excesses observed
by CMS and ATLAS.Comment: 29 pages, 14 figures; [v2] added references, corrected minor typo
The decays $h^0 \to b \bar{b}$ and $h^0 \to c \bar{c}$ in the light of
  the MSSM with quark flavour violation

We calculate the decay width of h0 -> b bbar in the Minimal Supersymmetric
Standard Model (MSSM) with quark flavour violation (QFV) at full one-loop
level. We study the effect of scharm-stop mixing and sstrange-sbottom mixing
taking into account the constraints from the B meson data. We discuss and
compare in detail the decays h0 -> c cbar and h0 -> b bbar within the framework
of the perturbative mass insertion technique using the Flavour Expansion
Theorem. The deviation of both decay widths from the Standard Model values can
be quite large. Whereas in h0 -> c cbar it is almost entirely due to the
flavour violating part of the MSSM, in h0 -> b bbar it is mainly due to the
flavour conserving part. Nevertheless, the QFV contribution to Gamma(h0 -> b
bbar) due to scharm-stop mixing and chargino exchange can go up to about 8%.Comment: Minor changes, version published in JHE
Nernst branes with Lifshitz asymptotics in N=2 gauged supergravity

We discuss two classes of non-supersymmetric interpolating solutions in N=2,
D=4 gauged supergravity, that flow from either a z=2 Lifshitz geometry or a
conformal AdS background to the near-horizon geometry of a Nernst brane. We
obtain these solutions by constructing a z=2 supersymmetric Lifshitz solution
in the STU model from a first-order rewriting of the action, then lifting it up
to a five-dimensional background and subsequently modifying this
five-dimensional solution by a two-parameter family of deformations. Under
reduction, these give four-dimensional non-supersymmetric Nernst brane
solutions. This is a step towards resolving the Lifshitz tidal force
singularity in the context of N=2 gauged supergravity and suggests an approach
to encoding the Nernst brane in terms of the Schroedinger symmetry group of the
holographically dual field theory.Comment: v2: 32 pages, improved presentation, added references, matches
  published versio
Nonlinear Sigma Models with Compact Hyperbolic Target Spaces

We explore the phase structure of nonlinear sigma models with target spaces
corresponding to compact quotients of hyperbolic space, focusing on the case of
a hyperbolic genus-2 Riemann surface. The continuum theory of these models can
be approximated by a lattice spin system which we simulate using Monte Carlo
methods. The target space possesses interesting geometric and topological
properties which are reflected in novel features of the sigma model. In
particular, we observe a topological phase transition at a critical
temperature, above which vortices proliferate, reminiscent of the
Kosterlitz-Thouless phase transition in the $O(2)$ model. Unlike in the $O(2)$
case, there are many different types of vortices, suggesting a possible analogy
to the Hagedorn treatment of statistical mechanics of a proliferating number of
hadron species. Below the critical temperature the spins cluster around six
special points in the target space known as Weierstrass points. The diversity
of compact hyperbolic manifolds suggests that our model is only the simplest
example of a broad class of statistical mechanical models whose main features
can be understood essentially in geometric terms.Comment: 14 pages, 6 Figure
Emergent Super-Virasoro on Magnetic Branes

The low energy limit of the stress tensor, gauge current, and supercurrent
two-point correlators are calculated in the background of the supersymmetric
magnetic brane solution to gauged five-dimensional supergravity constructed by
Almuhairi and Polchinski. The resulting correlators provide evidence for the
emergence of an N=2 super-Virasoro algebra of right-movers, in addition to a
bosonic Virasoro algebra and a $U(1) \oplus U(1)$-current algebra of
left-movers (or the parity transform of left- and right-movers depending on the
sign of the magnetic field), in the holographically dual strongly interacting
two-dimensional effective field theory of the lowest Landau level.Comment: 66 pages, 4 figures; minor edits and corrections in version thre
Direct and Semi-Direct Approaches to Lepton Mixing with a Massless
  Neutrino

We discuss the possibility of enforcing a massless Majorana neutrino in the
direct and semi-direct approaches to lepton mixing, in which the PMNS matrix is
partly predicted by subgroups of a discrete family symmetry, extending previous
group searches up to order 1535. We find a phenomenologically viable scheme for
the semi-direct approach based on $Q(648)$ which contains $\Delta(27)$ and the
quaternion group as subgroups. This leads to novel predictions for the first
column of the PMNS matrix corresponding to a normal neutrino mass hierarchy
with $m_1=0$, and sum rules for the mixing angles and phase which are
characterised by the solar angle being on the low side $\theta_{12}\sim
31^{\circ}$ and the Dirac (oscillation) CP phase $\delta$ being either about
$\pm 45^\circ$ or $\pm \pi$.Comment: 18 pages, 1 figure, small comments added in introduction and section
  3, one reference added, version matches publication in JHE
Modularity and 4D-2D spectral equivalences for large-N gauge theories
  with adjoint matter

In recent work, we demonstrated that the confined-phase spectrum of
non-supersymmetric pure Yang-Mills theory coincides with the spectrum of the
chiral sector of a two-dimensional conformal field theory in the large-$N$
limit. This was done within the tractable setting in which the gauge theory is
compactified on a three-sphere whose radius is small compared to the strong
length scale. In this paper, we generalize these observations by demonstrating
that similar results continue to hold even when massless adjoint matter fields
are introduced. These results hold for both thermal and $(-1)^F$-twisted
partition functions, and collectively suggest that the spectra of large-$N$
confining gauge theories are organized by the symmetries of two-dimensional
conformal field theories.Comment: 51 pages, LaTeX, 3 figure
New Signatures of Flavor Violating Higgs Couplings

We explore several novel LHC signatures arising from quark or lepton flavor
violating couplings in the Higgs sector, and we constrain such couplings using
LHC data. Since the largest signals are possible in channels involving top
quarks or tau leptons, we consider in particular the following flavor violating
processes: (1) $pp \to thh$ (top plus di-Higgs final state) arising from a
dimension six coupling of up-type quarks to three insertions of the Higgs
field. We develop a search strategy for this final state and demonstrate that
detection is possible at the high luminosity LHC if flavor violating
top--up--Higgs couplings are not too far below the current limit. (2) $pp \to
tH^0$, where $H^0$ is the heavy neutral CP-even Higgs boson in a two Higgs
doublet model (2HDM). We consider the decay channels $H^0 \to tu, WW, ZZ, hh$
and use existing LHC data to constrain the first three of them. For the fourth,
we adapt our search for the $thh$ final state, and we demonstrate that in large
regions of the parameter space, it is superior to other searches, including
searches for flavor violating top quark decays ($t \to hq$). (3) $H^0 \to
\tau\mu$, again in the context of a 2HDM. This channel is particularly well
motivated by the recent CMS excess in $h \to \tau\mu$, and we use the data from
this search to constrain the properties of $H^0$.Comment: 29 pages, 14 figures, 3 tables; published versio
Quality of the Peccei-Quinn symmetry in the Aligned QCD Axion and
  Cosmological Implications

We show that the required high quality of the Peccei-Quinn symmetry can be
naturally explained in the aligned QCD axion models where the QCD axion arises
from multiple axions with decay constants much smaller than the axion window,
e.g., around the weak scale. Even in the presence of general Planck-suppressed
Peccei-Quinn symmetry breaking operators, the effective strong CP phase remains
sufficiently small in contrast to the standard axion models without the
alignment. The QCD axion potential has small or large modulations due to the
symmetry breaking operators, which can significantly affect the axion
cosmology. When the axions are trapped in different minima, domain walls appear
and their scaling behavior suppresses the axion isocurvature perturbations at
super-horizon scales. Our scenario predicts many axions and saxions coupled to
gluons, and they may be searched for at collider experiments. In particular,
the recently found diphoton excess at 750 GeV could be due to one of such
(s)axions.Comment: 24 pages, 2 figures; v2: references added, version published in JHE
The evolution of the small x gluon TMD

We study the evolution of the small $x$ gluon transverse momentum
dependent(TMD) distribution in the dilute limit. The calculation has been
carried out in the Ji-Ma-Yuan scheme using a simple quark target model. As
expected, we find that the resulting small $x$ gluon TMD simultaneously
satisfies both the Collins-Soper(CS) evolution equation and the
Balitsky-Fadin-Kuraev-Lipatov(BFKL) evolution equation. We thus confirmed the
earlier finding that the high energy factorization(HEF) and the TMD
factorization should be jointly employed to resum the different type large
logarithms in a process where three relevant scales are well separated.Comment: 16 pages, 4 figure
Scalar Dark Matter: Direct vs. Indirect Detection

We revisit the simplest model for dark matter. In this context the dark
matter candidate is a real scalar field which interacts with the Standard Model
particles through the Higgs portal. We discuss the relic density constraints as
well as the predictions for direct and indirect detection. The final state
radiation processes are investigated in order to understand the visibility of
the gamma lines from dark matter annihilation. We find two regions where one
could observe the gamma lines at gamma-ray telescopes. We point out that the
region where the dark matter mass is between 92 and 300 GeV can be tested in
the near future at direct and indirect detection experiments.Comment: 27 pages, 9 figures; v2: new LUX bounds included, discussion
  enhanced; v3: minor corrections, to appear in JHE
Affleck-Dine Baryogenesis in Type IIB String Models

We present a viable string embedding of Affleck-Dine baryogenesis in type IIB
sequestered models where the late-time decay of the lightest modulus reheats
the universe to relatively low temperatures. We show that if inflation is
driven by a blow-up Kaehler modulus, the Affleck-Dine field can become
tachyonic during inflation if the Kaehler metric for matter fields has an
appropriate inflaton-dependent contribution. We find that the Affleck-Dine
mechanism can generate the observed baryon asymmetry for natural values of the
underlying parameters which lead also to successful inflation and low-energy
gaugino masses in a split supersymmetry scenario. The reheating temperature
from the lightest modulus decay is high enough to allow thermal Higgsino-like
dark matter.Comment: 24 pages, 1 figur
NNLOPS accurate associated HW production

We present a next-to-next-to-leading order accurate description of associated
HW production consistently matched to a parton shower. The method is based on
reweighting events obtained with the HW plus one jet NLO accurate calculation
implemented in POWHEG, extended with the MiNLO procedure, to reproduce NNLO
accurate Born distributions. Since the Born kinematics is more complex than the
cases treated before, we use a parametrization of the Collins-Soper angles to
reduce the number of variables required for the reweighting. We present
phenomenological results at 13 TeV, with cuts suggested by the Higgs Cross
Section Working Group.Comment: Minor changes, plots updated, matches the version published in JHE
Double supergeometry

A geometry of superspace corresponding to double field theory is developed,
with type II supergravity in D=10 as the main example. The formalism is based
on an orthosymplectic extension OSp(d,d|2s) of the continuous T-duality group.
Covariance under generalised super-diffeomorphisms is manifest. Ordinary
superspace is obtained as a solution of the orthosymplectic section condition.
A systematic study of curved superspace Bianchi identities is performed, and a
relation to a double pure spinor superfield cohomology is established. A
Ramond-Ramond superfield is constructed as an infinite-dimensional
orthosymplectic spinor. Such objects in minimal orbits under the OSp supergroup
("pure spinors") define super-sections.Comment: 28 pp., plain tex. v2: refs. adde
The Galactic Center Excess from Z3 Scalar Semi-Annihilations

We investigate the possibility of the Z3 scalar singlet model explaining the
Fermi galactic centre excess. We find a good fit to the measured spectral
excess in the region where the dark matter mass is comparable to the Higgs and
the Higgs portal coupling $\lambda_{HS}\sim 0.04$. This preferred region is
consistent with constraints from vacuum stability and current dark matter
experiments, and will be discovered or falsified soon by future dark matter
direct detection experiment.Comment: 11 pages, 3 figures; additional reference
Non-Relativistic Scale Anomalies

We extend the cohomological analysis in arXiv:1410.5831 of anisotropic
Lifshitz scale anomalies. We consider non-relativistic theories with a
dynamical critical exponent $z=2$ with or without non-relativistic boosts and a
particle number symmetry. We distinguish between cases depending on whether the
time direction does or does not induce a foliation structure. We analyse both
$1+1$ and $2+1$ spacetime dimensions. In $1+1$ dimensions we find no scale
anomalies with Galilean boost symmetries. The anomalies in $2+1$ dimensions
with Galilean boosts and a foliation structure are all B-type and are identical
to the Lifshitz case in the purely spatial sector. With Galilean boosts and
without a foliation structure we find also an A-type scale anomaly. There is an
infinite ladder of B-type anomalies in the absence of a foliation structure
with or without Galilean boosts. We discuss the relation between the existence
of a foliation structure and the causality of the field theory
Black hole thermodynamics, conformal couplings, and R^2 terms

Lovelock theory provides a tractable model of higher-curvature gravity in
which several questions can be studied analytically. This is the reason why, in
the last years, this theory has become the favorite arena to study the effects
of higher-curvature terms in the context of AdS/CFT correspondence. Lovelock
theory also admits extensions that permit to accommodate matter coupled to
gravity in a non-minimal way. In this setup, problems such as the backreaction
of matter on the black hole geometry can also be solved exactly. In this paper,
we study the thermodynamics of black holes in theories of gravity of this type,
which include both higher-curvature terms, U(1) gauge fields, and conformal
couplings with matter fields in D dimensions. These charged black hole
solutions exhibit a backreacting scalar field configuration that is regular
everywhere outside and on the horizon, and may exist both in asymptotically
flat and asymptotically Anti-de Sitter (AdS) spaces. We work out explicitly the
boundary action for this theory, which renders the variational problem
well-posed and suffices to regularize the Euclidean action in AdS. We also
discuss several interrelated properties of the theory, such as its duality
symmetry under field redefinition and how it acts on black holes and
gravitational wave solutions.Comment: 24 pages, no figures; v2: references added, typos correcte