pinecone/core-2020-05-10-deduplication huggingface dataset:
Asymptotic structure of $\mathcal{N}=2$ supergravity in 3D: extended
  super-BMS$_3$ and nonlinear energy bounds

The asymptotically flat structure of $\mathcal{N}=(2,0)$ supergravity in
three spacetime dimensions is explored. The asymptotic symmetries are spanned
by an extension of the super-BMS$_3$ algebra, with two independent $\hat{u}(1)$
currents of electric and magnetic type. These currents are associated to $U(1)$
fields being even and odd under parity, respectively. Remarkably, although the
$U(1)$ fields do not generate a backreaction on the metric, they provide
nontrivial Sugawara-like contributions to the BMS$_3$ generators, and hence to
the energy and the angular momentum. The entropy of flat cosmological
spacetimes with $U(1)$ fields then acquires a nontrivial dependence on the
$\hat{u}(1)$ charges. If the spin structure is odd, the ground state
corresponds to Minkowski spacetime, and although the anticommutator of the
canonical supercharges is linear in the energy and in the electric-like
$\hat{u}(1)$ charge, the energy becomes bounded from below by the energy of the
ground state shifted by the square of the electric-like $\hat{u}(1)$ charge. If
the spin structure is even, the same bound for the energy generically holds,
unless the absolute value of the electric-like charge is less than minus the
mass of Minkowski spacetime in vacuum, so that the energy has to be
nonnegative. The explicit form of the Killing spinors is found for a wide class
of configurations that fulfills our boundary conditions, and they exist
precisely when the corresponding bounds are saturated. It is also shown that
the spectra with periodic or antiperiodic boundary conditions for the fermionic
fields are related by spectral flow, in a similar way as it occurs for the
$\mathcal{N}=2$ super-Virasoro algebra. Indeed, our super-BMS$_3$ algebra can
be recovered from the flat limit of the superconformal algebra with
$\mathcal{N}=(2,2)$, truncating the fermionic generators of the right copy.Comment: 32 pages, no figures. Talk given at the ESI Programme and Workshop
  "Quantum Physics and Gravity" hosted by ESI, Vienna, June 2017. V3: minor
  changes and typos corrected. Matches published versio
Holographic self-tuning of the cosmological constant

We propose a brane-world setup based on gauge/gravity duality in which the
four-dimensional cosmological constant is set to zero by a dynamical
self-adjustment mechanism. The bulk contains Einstein gravity and a scalar
field. We study holographic RG flow solutions, with the standard model brane
separating an infinite volume UV region and an IR region of finite volume. For
generic values of the brane vacuum energy, regular solutions exist such that
the four-dimensional brane is flat. Its position in the bulk is determined
dynamically by the junction conditions. Analysis of linear fluctuations shows
that a regime of 4-dimensional gravity is possible at large distances, due to
the presence of an induced gravity term. The graviton acquires an effective
mass, and a five-dimensional regime may exist at large and/or small scales. We
show that, for a broad choice of potentials, flat-brane solutions are
manifestly stable and free of ghosts. We compute the scalar contribution to the
force between brane-localized sources and show that, in certain models, the
vDVZ discontinuity is absent and the effective interaction at short distances
is mediated by two transverse graviton helicities.Comment: 65 pages plus appendixes, 18 figures. Minor correction of numerical
  factors in sections 4, 5 and appendix
Searches for transverse momentum dependent flow vector fluctuations in
  Pb-Pb and p-Pb collisions at the LHC

The measurement of azimuthal correlations of charged particles is presented
for Pb-Pb collisions at $\sqrt{s_{\rm NN}}=$ 2.76 TeV and p-Pb collisions at
$\sqrt{s_{\rm NN}}=$ 5.02 TeV with the ALICE detector at the CERN Large Hadron
Collider. These correlations are measured for the second, third and fourth
order flow vector in the pseudorapidity region $|\eta|<0.8$ as a function of
centrality and transverse momentum $p_{\rm T}$ using two observables, to search
for evidence of $p_{\rm T}$-dependent flow vector fluctuations. For Pb-Pb
collisions at 2.76 TeV, the measurements indicate that $p_{\rm T}$-dependent
fluctuations are only present for the second order flow vector. Similar results
have been found for p-Pb collisions at 5.02 TeV. These measurements are
compared to hydrodynamic model calculations with event-by-event geometry
fluctuations in the initial state to constrain the initial conditions and
transport properties of the matter created in Pb-Pb and p-Pb collisions.Comment: 30 pages, 15 captioned figures, 3 tables, authors from page 25,
  published version, figures at
  http://aliceinfo.cern.ch/ArtSubmission/node/367
Reconciling Large And Small-Scale Structure In Twin Higgs Models

We study extensions of the Twin Higgs model that solve the Hierarchy problem
and simultaneously address problems of the large- and small-scale structures of
the Universe. Besides naturally providing dark matter (DM) candidates as the
lightest charged twin fermions, the twin sector contains a light photon and
neutrinos, which can modify structure formation relative to the prediction from
the $\Lambda$CDM paradigm. We focus on two scenarios. First, we study a
Fraternal Twin Higgs model in which the spin-3/2 baryon
$\hat{\Omega}\sim(\hat{b}\hat{b}\hat{b})$ and the lepton twin tau $\hat{\tau}$
contribute to the dominant and subcomponent dark matter densities. A
non-decoupled scattering between the twin tau and twin neutrino arising from a
gauged twin lepton number symmetry provides a drag force that damps the density
inhomogeneity of a dark matter subcomponent. Next, we consider the possibility
of having the twin hydrogen atom $\hat{H}$ as the dominant DM component. After
recombination, a small fraction of the twin protons and leptons remains ionized
during structure formation, and their scattering to twin neutrinos through a
gauged U$(1)_{B-L}$ force provides the mechanism that damps the density
inhomogeneity. Both scenarios realize the Partially Acoustic dark matter
(PAcDM) scenario and explain the $\sigma_8$ discrepancy between the CMB and
weak lensing results. Moreover, the self-scattering neutrino behaves as a dark
fluid that enhances the size of the Hubble rate $H_0$ to accommodate the local
measurement result while satisfying the CMB constraint. For the small-scale
structure, the scattering of $\hat{\Omega}$'s and $\hat{H}$'s through the twin
photon exchange generates a self-interacting dark matter (SIDM) model that
solves the mass deficit problem from dwarf galaxy to galaxy cluster scales.Comment: 22 pages, 5 figures; version accepted for publication in JHEP;
  include discussion of twin hydrogen D
Next-to-leading-order QCD and electroweak corrections to WWW production
  at proton-proton colliders

Triple-W-boson production in proton-proton collisions allows for a direct
access to the triple and quartic gauge couplings and provides a window to the
mechanism of electroweak symmetry breaking. It is an important process to test
the Standard Model (SM) and might be background to physics beyond the SM. We
present a calculation of the next-to-leading order (NLO) electroweak
corrections to the production of WWW final states at proton-proton colliders
with on-shell W bosons and combine the electroweak with the NLO QCD
corrections. We study the impact of the corrections to the integrated cross
sections and to kinematic distributions of the W bosons. The electroweak
corrections are generically of the size of 5-10% for integrated cross sections
and become more pronounced in specific phase-space regions. The real
corrections induced by quark-photon scattering turn out to be as important as
electroweak loops and photon bremsstrahlung corrections, but can be reduced by
phase-space cuts. Considering that prior determinations of the photon parton
distribution function (PDF) involve rather large uncertainties, we compare the
results obtained with different photon PDFs and discuss the corresponding
uncertainties in the NLO predictions. Moreover, we determine the scale and
total PDF uncertainties at the LHC and a possible future 100 TeV pp collider.Comment: 15 pages, 9 figures, 5 tables, revised version, published in JHE
Yang Baxter and Anisotropic Sigma and Lambda Models, Cyclic RG and Exact
  S-Matrices

Integrable deformation of SU(2) sigma and lambda models are considered at the
classical and quantum levels. These are the Yang-Baxter and XXZ-type
anisotropic deformations. The XXZ type deformations are UV safe in one regime,
while in another regime, like the Yang-Baxter deformations, they exhibit cyclic
RG behaviour. The associated affine quantum group symmetry, realized
classically at the Poisson bracket level, has q a complex phase in the UV safe
regime and q real in the cyclic RG regime, where q is an RG invariant. Based on
the symmetries and RG flow we propose exact factorizable S-matrices to describe
the scattering of states in the lambda models, from which the sigma models
follow by taking a limit and non-abelian T-duality. In the cyclic RG regimes,
the S-matrices are periodic functions of rapidity, at large rapidity, and in
the Yang-Baxter case violate parity.Comment: 55 pages; v2 - refs added and some expanded discussion of
  \tilde{\beta}^\ph
The Weak Gravity Conjecture and the Axionic Black Hole Paradox

In theories with a perturbatively massless 2-form (dual to an axion), a
paradox may arise in the process of black hole evaporation. Schwarzschild black
holes can support a non-trivial Wilson-line-type field, the integral of the
2-form around their horizon. After such an 'axionic black hole' evaporates, the
Wilson line must be supported by the corresponding 3-form field strength in the
region formerly occupied by the black hole. In the limit of small axion
decay-constant f, the energy required for this field configuration is too
large. The natural resolution is through the presence of light strings, which
allow the black hole to "shed" its axionic hair sufficiently early. This gives
rise to a new Weak-Gravity-type argument in the 2-form context: Small coupling,
in this case f, enforces the presence of light strings or a low cutoff. We also
discuss how this argument may be modified in situations where the weak coupling
regime is achieved in the low-energy effective theory through an appropriate
gauging of a model with a vector field and two 2-forms.Comment: 16 pages, 1 figure, minor changes, added reference
Resonant Higgs pair production as a probe of stop at the LHC

Searching for top squark (stop) is a crucial task of the LHC. When the flavor
conserving two body decays of the stop are kinematically forbidden, the stops
produced near the threshold will live long enough to form bound states which
subsequently decay through annihilation into the Standard Model (SM) final
states. In the region of stop mixing angle $\theta_{\tilde{t}} \to 0$ or
$\pi/2$, we note that the LHC-13 TeV diphoton resonance data can give a strong
bound on the spin-$0$ stoponium ($\eta_{\tilde{t}}$) and exclude the
constituent stop mass $m_{\tilde{t}}$ up to about 290 GeV. While in the large
stop mixing region, the stoponium will dominantly decay to the Higgs pair. By
analyzing the process $pp \to \eta_{\tilde{t}} \to h (\to b\bar{b} )h (\to
\tau^+\tau^-)$, we find that a large portion of the parameter space on the
$m_{\tilde{t}_1}$ - $\theta_{\tilde{t}}$ plane can be probed at $2\sigma$
significance level at the LHC with the luminosity ${\cal L}=3000$ fb$^{-1}$.Comment: 12 pages, discussions and references added, version accepted by JHE
The $AdS_5$ non-Abelian T-dual of Klebanov-Witten as a $\mathcal{N} = 1$
  linear quiver from M5-branes

In this paper we study an $AdS_5$ solution constructed using non-Abelian
T-duality, acting on the Klebanov-Witten background. We show that this is dual
to a linear quiver with two tails of gauge groups of increasing rank. The field
theory dynamics arises from a D4-NS5-NS5' brane set-up, generalizing the
constructions discussed by Bah and Bobev. These realize $\mathcal{N}=1$ quiver
gauge theories built out of $\mathcal{N}=1$ and $\mathcal{N}=2$ vector
multiplets flowing to interacting fixed points in the infrared. We compute the
central charge using $a$-maximization, and show its precise agreement with the
holographic calculation. Our result exhibits $n^3$ scaling with the number of
five-branes. This suggests an eleven-dimensional interpretation in terms of
M5-branes, a generic feature of various $AdS$ backgrounds obtained via
non-Abelian T-duality.Comment: 27 pages plus interesting appendixes and various figures. Improved
  quiver field theory proposa
A New Twist on the Geometry of Gravitational Plane Waves

The geometry of twisted null geodesic congruences in gravitational plane wave
spacetimes is explored, with special focus on homogeneous plane waves. The role
of twist in the relation of the Rosen coordinates adapted to a null congruence
with the fundamental Brinkmann coordinates is explained and a generalised form
of the Rosen metric describing a gravitational plane wave is derived. The
Killing vectors and isometry algebra of homogeneous plane waves (HPWs) are
described in both Brinkmann and twisted Rosen form and used to demonstrate the
coset space structure of HPWs. The van Vleck-Morette determinant for twisted
congruences is evaluated in both Brinkmann and Rosen descriptions. The twisted
null congruences of the Ozsvath-Schucking,`anti-Mach' plane wave are
investigated in detail. These developments provide the necessary geometric
toolkit for future investigations of the role of twist in loop effects in
quantum field theory in curved spacetime, where gravitational plane waves arise
generically as Penrose limits; in string theory, where they are important as
string backgrounds; and potentially in the detection of gravitational waves in
astronomy.Comment: 60 pages, 2 figures. Extended version with new material on Rosen
  geodesics and isometries. Title change
Simultaneous Explanation of $R(D^{(*)})$ and $b\to s\mu^+\mu^-$: The
  Last Scalar Leptoquarks Standing

Over the past years, experiments accumulated intriguing hints for new physics
(NP) in flavor observables, namely in the anomalous magnetic moment of the muon
($a_\mu$), in $R(D^{(*)})={\rm Br}(B\to D^{(*)}\tau\nu)/{\rm Br}(B\to
D^{(*)}\ell\nu)$ and in $b\to s\mu^+\mu^-$ transitions, which are all at the
$3-4\,\sigma$ level. In this article we point out that one can explain the
$R(D^{(*)})$ anomaly using two scalar leptoquarks (LQs) with the same mass and
coupling to fermions related via a discrete symmetry: an $SU(2)$ singlet and an
$SU(2)$ triplet, both with hypercharge $Y=-2/3$. In this way, potentially
dangerous contributions to $b\to s\nu\nu$ are avoided and non-CKM suppressed
effects in $R(D^{(*)})$ can be generated. This allows for smaller overall
couplings to fermions weakening the direct LHC bounds. In our model,
$R(D^{(*)})$ is directly correlated to $b\to s\tau^+\tau^-$ transitions where
an enhancement by orders of magnitude compared to the standard model (SM) is
predicted, such that these decay modes are in the reach of LHCb and BELLE II.
Furthermore, one can also naturally explain the $b\to s\mu^+\mu^-$ anomalies
(including $R(K)$) by a $C_9=-C_{10}$ like contribution without spoiling
$\mu-e$ universality in charged current decays. In this case sizable effects in
$b\to s\tau\mu$ transitions are predicted which are again well within the
experimental reach. One can even address the longstanding anomaly in $a_\mu$,
generating a sizable decay rate for $\tau\to\mu\gamma$. However, we find that
out of the three anomalies $R(D^{(*)})$, $b\to s\mu^+\mu^-$ and $a_{\mu}$ only
two (but any two) can be explained simultaneously.Comment: 8 pages, 4 figures, version accepted for publication in JHE
Electroweak and Higgs Boson Internal Bremsstrahlung: General
  considerations for Majorana dark matter annihilation and application to MSSM
  neutralinos

It is well known that the annihilation of Majorana dark matter into fermions
is helicity suppressed. Here, we point out that the underlying mechanism is a
subtle combination of two distinct effects, and we present a comprehensive
analysis of how the suppression can be partially or fully lifted by the
internal bremsstrahlung of an additional boson in the final state. As a
concrete illustration, we compute analytically the full amplitudes and
annihilation rates of supersymmetric neutralinos to final states that contain
any combination of two standard model fermions, plus one electroweak gauge
boson or one of the five physical Higgs bosons that appear in the minimal
supersymmetric standard model. We classify the various ways in which these
three-body rates can be large compared to the two-body rates, identifying cases
that have not been pointed out before. In our analysis, we put special emphasis
on how to avoid the double counting of identical kinematic situations that
appear for two-body and three-body final states, in particular on how to
correctly treat differential rates and the spectrum of the resulting stable
particles that is relevant for indirect dark matter searches. We find that both
the total annihilation rates and the yields can be significantly enhanced when
taking into account the corrections computed here, in particular for models
with somewhat small annihilation rates at tree-level which otherwise would not
be testable with indirect dark matter searches. Even more importantly, however,
we find that the resulting annihilation spectra of positrons, neutrinos,
gamma-rays and antiprotons differ in general substantially from the
model-independent spectra that are commonly adopted, for these final states,
when constraining particle dark matter with indirect detection experiments.Comment: 64 pages with jheppub.sty, 15 figures and 12 tables. Slightly
  extended discussion + minor updates to match published versio
Surface Counterterms and Regularized Holographic Complexity

The holographic complexity is UV divergent. As a finite complexity, we
propose a "regularized complexity" by employing a similar method to the
holographic renormalization. We add codimension-two boundary counterterms which
do not contain any boundary stress tensor information. It means that we
subtract only non-dynamic background and all the dynamic information of
holographic complexity is contained in the regularized part. After showing the
general counterterms for both CA and CV conjectures in holographic spacetime
dimension 5 and less, we give concrete examples: the BTZ black holes and the
four and five dimensional Schwarzschild AdS black holes. We propose how to
obtain the counterterms in higher spacetime dimensions and show explicit
formulas only for some special cases with enough symmetries. We also compute
the complexity of formation by using the regularized complexity.Comment: Published version with some small improvement
Modular Inflation Observables and $j$-Inflation Phenomenology

Modular inflation is the restriction to two fields of automorphic inflation,
a general group based framework for multifield scalar field theories with
curved target spaces, which can be parametrized by the comoving curvature
perturbation ${\cal R}$ and the isocurvature perturbation tensor $S^{IJ}$. This
paper describes the dynamics and observables of these perturbations and
considers in some detail the special case of modular inflation as an extensive
class of two-field inflation theories with a conformally flat target space. It
is shown that the nonmodular nature of derivatives of modular forms leads to
CMB observables in modular invariant inflation theories that are in general
constructed from almost holomorphic modular forms. The phenomenology of the
model of $j$-inflation is compared to the recent observational constraints from
the Planck satellite and the BICEP2/Keck Array data.Comment: 39 pages, 3 figures. This extended version includes a detailed
  discussion of the almost holomorphic nature of the physical observables in
  modular invariant inflation theorie
Duality Twisted Reductions of Double Field Theory of Type II Strings

We study duality twisted reductions of the Double Field Theory (DFT) of the
RR sector of massless Type II theory, with twists belonging to the duality
group $Spin^+(10,10)$. We determine the action and the gauge algebra of the
resulting theory and determine the conditions for consistency. In doing this,
we work with the DFT action constructed by Hohm, Kwak and Zwiebach, which we
rewrite in terms of the Mukai pairing: a natural bilinear form on the space of
spinors, which is manifestly $Spin(n,n)$ invariant. If the duality twist is
introduced via the $Spin^+(10,10)$ element $S$ in the RR sector, then the NS-NS
sector should also be deformed via the duality twist $U = \rho(S)$, where
$\rho$ is the double covering homomorphism between $Pin(n,n)$ and $O(n,n)$. We
show that the set of conditions required for the consistency of the reduction
of the NS-NS sector are also crucial for the consistency of the reduction of
the RR sector, owing to the fact that the Lie algebras of $Spin(n,n)$ and
$SO(n,n)$ are isomorphic. In addition, requirement of gauge invariance imposes
an extra constraint on the fluxes that determine the deformations.Comment: chapter 4 revised and expanded, references added, published versio
Wilson lines in the MHV action

The MHV action is the Yang-Mills action quantized on the light-front, where
the two explicit physical gluonic degrees of freedom have been canonically
transformed to a new set of fields. This transformation leads to the action
with vertices being off-shell continuations of the MHV amplitudes. We show that
the solution to the field transformation expressing one of the new fields in
terms of the Yang-Mills field is a certain type of the Wilson line. More
precisely, it is a straight infinite gauge link with a slope extending to the
light-cone minus and the transverse direction. One of the consequences of that
fact is that certain MHV vertices reduced partially on-shell are gauge
invariant -- a fact discovered before using conventional light-front
perturbation theory. We also analyze the diagrammatic content of the field
transformations leading to the MHV action. We found that the diagrams for the
solution to the transformation (given by the Wilson line) and its inverse
differ only by light-front energy denominators. Further, we investigate the
coordinate space version of the inverse solution to the one given by the Wilson
line. We find an explicit expression given by a power series in fields. We also
give a geometric interpretation to it by means of a specially defined vector
field. Finally, we discuss the fact that the Wilson line solution to the
transformation is directly related to the all-like helicity gluon wave
function, while the inverse functional is a generating functional for solutions
of self-dual Yang-Mills equations.Comment: 44 pages, a few figure
Quasi-Normal Modes from Non-Commutative Matrix Dynamics

We explore the connection between the process of relaxation in the BMN matrix
model and the physics of black holes in AdS/CFT. Focusing on Dyson-fluid
solutions of the matrix model, we perform numerical simulations of the real
time dynamics of the system. By quenching the equilibrium distribution we study
the quasi-normal oscillations of scalar single trace observables, we isolate
the lowest quasi-normal mode, and we determine its frequencies as function of
the energy. Considering the BMN matrix model as a truncation of $\mathcal{N}=4$
SYM, we also compute the frequencies of the quasi-normal modes of the dual
scalar fields in the AdS$_5$-Schwarzschild background. We compare the results,
and we find a surprising similarity.Comment: 19 pages, 10 figures, v2: presentation and discussion improved in
  various points according to the referee report, references added, to appear
  in JHE