pinecone/core-2020-05-10-deduplication huggingface dataset:
$D$-dimensional charged Anti-de-Sitter black holes in $f(T)$ gravity

We present a $D$-dimensional charged Anti-de-Sitter black hole solutions in
$f(T)$ gravity, where $f(T)=T+\beta T^2$ and $D \geq 4$. These solutions are
characterized by flat or cylindrical horizons. The interesting feature of these
solutions is the existence of inseparable electric monopole and quadrupole
terms in the potential which share related momenta, in contrast with most of
the known charged black hole solutions in General Relativity and its
extensions. Furthermore, these solutions have curvature singularities which are
milder than those of the known charged black hole solutions in General
Relativity and Teleparallel Gravity. This feature can be shown by calculating
some invariants of curvature and torsion tensors. Furthermore, we calculate the
total energy of these black holes using the energy-momentum tensor. Finally, we
show that these charged black hole solutions violate the first law of
thermodynamics in agreement with previous results.Comment: 11 Pages, will appear in JHE
On HQET and NRQCD Operators of Dimension 8 and Above

Effective field theories such as Heavy Quark Effective Theory (HQET) and Non
Relativistic Quantum Chromo-(Electro-) dynamics NRQCD (NRQED) are indispensable
tools in controlling the effects of the strong interaction. The increasing
experimental precision requires the knowledge of higher dimensional operators.
We present a general method that allows for an easy construction of HQET or
NRQCD (NRQED) operators that contain two heavy quark or non-relativistic fields
and any number of covariant derivatives. As an application of our method, we
list these terms in the $1/M^4$ NRQCD Lagrangian, where $M$ is the mass of of
the spin-half field.Comment: 28 pages, footnote added, journal versio
String-motivated one-loop amplitudes in gauge theories with half-maximal
  supersymmetry

We compute one-loop amplitudes in six-dimensional Yang-Mills theory with
half-maximal supersymmetry from first principles: imposing gauge invariance and
locality on an ansatz made from string-theory inspired kinematic building
blocks yields unique expressions for the 3- and 4-point amplitudes. We check
that the results are reproduced in the field-theory limit $\alpha' \rightarrow
0$ of string amplitudes in K3 orbifolds, using simplifications made in a
companion string-theory paper 1603.05262.Comment: 59 pages, 11 figures, published versio
Revisiting Large Neutrino Magnetic Moments

Current experimental sensitivity on neutrino magnetic moments is many orders
of magnitude above the Standard Model prediction. A potential measurement of
next-generation experiments would therefore strongly request new physics beyond
the Standard Model. However, large neutrino magnetic moments generically tend
to induce large corrections to the neutrino masses and lead to fine-tuning. We
show that in a model where neutrino masses are proportional to neutrino
magnetic moments. We revisit, discuss and propose mechanisms that still provide
theoretical consistent explanations for a potential measurement of large
neutrino magnetic moments. We find only two viable mechanisms to realize large
transition magnetic moments for Majorana neutrinos only.Comment: 12 pages, 7 figure
Pseudo-Majoron as Light Mediator of Singlet Scalar Dark Matter

In the singlet-triplet majoron model of neutrino mass, lepton number is
spontaneously broken. If it is also softly broken, then a naturally light
pseudoscalar particle $\eta_I$ exists. It may then act as a light mediator for
a real singlet scalar $\chi$ with odd dark parity. It is itself unstable, but
decays dominantly to two neutrinos through its triplet scalar component,
thereby not disturbing the cosmic microwave background (CMB). It also mixes
with the standard-model Higgs boson only in one loop, thereby not contributing
significantly to the elastic scattering of $\chi$ off nuclei in dark-matter
direct-search experiments.Comment: 10 page
Medium response in JEWEL and its impact on jet shape observables in
  heavy ion collisions

Realistic modeling of medium-jet interactions in heavy ion collisions is
becoming increasingly important to successfully predict jet structure and shape
observables. In JEWEL, all partons belonging to the parton showers initiated by
hard scattered partons undergo collisions with thermal partons from the medium,
leading to both elastic and radiative energy loss. The recoiling medium partons
carry away energy and momentum from the jet. Since the thermal component of
these recoils' momenta is part of the soft background activity, comparison with
data requires the implementation of a subtraction procedure. We present two
independent procedures through which background subtraction can be performed
and discuss the impact of the medium recoil on jet shape observables. Keeping
track of the medium response significantly improves the JEWEL description of
jet shape measurements.Comment: 23 pages, 16 figure
Entanglement Entropy in Flat Holography

BMS symmetry, which is the asymptotic symmetry at null infinity of flat
spacetime, is an important input for flat holography. In this paper, we give a
holographic calculation of entanglement entropy and R\'{e}nyi entropy in three
dimensional Einstein gravity and Topologically Massive Gravity. The geometric
picture for the entanglement entropy is the length of a spacelike geodesic
which is connected to the interval at null infinity by two null geodesics. The
spacelike geodesic is the fixed points of replica symmetry, and the null
geodesics are along the modular flow. Our strategy is to first reformulate the
Rindler method for calculating entanglement entropy in a general setup, and
apply it for BMS invariant field theories, and finally extend the calculation
to the bulk.Comment: 48pages, 1 figur
$\sin^2(\theta)w$ estimate and bounds on nonstandard interactions at
  source and detector in the solar neutrino low-energy regime

We explore the implications of the Borexino experiment's real time
measurements of the lowest energy part of the neutrino spectrum from the
primary pp fusion process up to 0.420 MeV through the 7^Be decay at 0.862 MeV
to the pep reaction at 1.44 MeV. We exploit the fact that at such low energies,
the large mixing angle solution to the Mikheyev-Smirnov-Wolfenstein matter
effects in the sun are small for 7^Be and pep and negligible for pp.
Consequently, the neutrinos produced in the sun change their flavor almost
entirely through vacuum oscillations during propagation from the sun's surface
and through possible nonstandard interactions acting at the solar source and
Borexino detector. We combine the different NSI effects at source and detector
in a single framework and use the current Borexino data to bound NSI
non-universal and flavor- changing parameters at energies below the reach of
reactor neutrino experiments. We also study the implication of the current data
for the weak- mixing angle at this "low-energy frontier" data from the Borexino
experiment, where it is expected to be slightly larger than its value at the Z
mass. We find $\sin^2(\theta)w=0.224+-0.016$, the lowest energy-scale estimate
to date. Looking to the future, we use projected sensitivities to solar
neutrinos in next generation dedicated solar experiments and direct dark matter
detection experiments and find a potential factor five improvement in
determination of the weak-mixing angle and up to an order of magnitude
improvement in probing the NSI parameters space.Comment: 20 pages, 09 figures, lowest-energy value of sin^2(theta)w to date
  has been reported. Some text added. New sub-section(7.5) added. Published in
  JHE
Bosonic Partition Functions at Nonzero (Imaginary) Chemical Potential

We consider bosonic random matrix partition functions at nonzero chemical
potential and compare the chiral condensate, the baryon number density and the
baryon number susceptibility to the result of the corresponding fermionic
partition function. We find that as long as results are finite, the phase
transition of the fermionic theory persists in the bosonic theory. However, in
case that bosonic partition function diverges and has to be regularized, the
phase transition of the fermionic theory does not occur in the bosonic theory,
and the bosonic theory is always in the broken phase.Comment: 30 pages, 6 figure
The Swampland Conjecture and F-term Axion Monodromy Inflation

We continue the investigation of F-term axion monodromy inflation in string
theory, while seriously taking the issue of moduli stabilization into account.
For a number of closed and open string models, we show that they suffer from
serious control issues once one is trying to realize trans-Planckian field
excursions. More precisely, the flux tuning required to delay the logarithmic
scaling of the field distance to a trans-Planckian value cannot be done without
leaving the regime where the employed effective supergravity theory is under
control. Our findings are consistent with the axionic extension of the Refined
Swampland Conjecture, stating that in quantum gravity the effective theory
breaks down for a field excursion beyond the Planck scale. Our analysis
suggests that models of F-term axion monodromy inflation with a
tensor-to-scalar ratio $r\ge O(10^{-3})$ cannot be parametrically controlled.Comment: 50 pages, 3 figures, v2: typos corrected and references adde
Low-energy effective action in two-dimensional SQED: A two-loop analysis

We study two-loop quantum corrections to the low-energy effective actions in
N=(2,2) and N=(4,4) SQED in the Coulomb branch. In the latter model, the
low-energy effective action is described by a generalized Kahler potential
which depends on both chiral and twisted chiral superfields. We demonstrate
that this generalized Kahler potential is one-loop exact and corresponds to the
N=(4,4) sigma-model with torsion presented by Rocek, Schoutens and Sevrin. In
the N=(2,2) SQED, the effective Kahler potential is not protected against
higher-loop quantum corrections. The two-loop quantum corrections to this
potential and the corresponding sigma-model metric are explicitly found.Comment: 40 pages; v2: references added, typos correcte
Holography and $AdS_2$ gravity with a dynamical aether

We study two-dimensional Einstein-aether (or equivalently
Ho\v{r}ava-Lifshitz) gravity, which has an $AdS_2$ solution. We examine various
properties of this solution in the context of holography. We first show that
the asymptotic symmetry group is the full set of time reparametrizations, the
one-dimensional conformal group. At the same time there are configurations with
finite energy and temperature, which indicate a violation of the Ward identity
associated with one-dimensional conformal invariance. These solutions are
characterized by a universal causal horizon and we show that the associated
entropy of the universal horizon scales with the logarithm of the temperature.
We discuss the puzzles associated with this result and argue that the violation
of the Ward identity is associated with a type of explicit breaking of time
reparametrizations in the hypothetical $0+1$ dimensional dual system.Comment: 19 pages, v2: minor revisions, references adde
Scheming in the SMEFT... and a reparameterization invariance!

We explain a reparameterization invariance in the Standard Model Effective
Field Theory present when considering $\bar{\psi} \psi \rightarrow \bar{\psi}
\psi$ scatterings (with $\psi$ a fermion) and how this leads to unconstrained
combinations of Wilson coefficients in global data analyses restricted to these
measurements. We develop a $\{\hat{m}_W, \hat{m}_Z,\hat{G}_F\}$ input parameter
scheme and compare results to the case when an input parameter set
$\{\hat{\alpha}, \hat{m}_Z,\hat{G}_F\}$ is used to constrain this effective
theory from the global data set, confirming the input parameter independence of
the unconstrained combinations of Wilson coefficients, and supporting the
reparameterization invariance explanation. We discuss some conceptual issues
related to these degeneracies that are relevant for LHC data reporting and
analysis.Comment: 41 pages, 8 tables, 8 figures. addendum in appendix - results
  obtained allowing two independent flavor contractions for the operator Q_ll
  in the U(3)^5 flavor symmetric limi
Quantum critical response: from conformal perturbation theory to
  holography

We discuss dynamical response functions near quantum critical points,
allowing for both a finite temperature and detuning by a relevant operator.
When the quantum critical point is described by a conformal field theory (CFT),
conformal perturbation theory and the operator product expansion can be used to
fix the first few leading terms at high frequencies. Knowledge of the high
frequency response allows us then to derive non-perturbative sum rules. We
show, via explicit computations, how holography recovers the general results of
CFT, and the associated sum rules, for any holographic field theory with a
conformal UV completion -- regardless of any possible new ordering and/or
scaling physics in the IR. We numerically obtain holographic response functions
at all frequencies, allowing us to probe the breakdown of the asymptotic
high-frequency regime. Finally, we show that high frequency response functions
in holographic Lifshitz theories are quite similar to their conformal
counterparts, even though they are not strongly constrained by symmetry.Comment: 45+14 pages, 9 figures. v2: small clarifications, added reference
Tunable Quantum Chaos in the Sachdev-Ye-Kitaev Model Coupled to a
  Thermal Bath

The Sachdev-Ye-Kitaev (SYK) model describes Majorana fermions with random
interaction, which displays many interesting properties such as non-Fermi
liquid behavior, quantum chaos, emergent conformal symmetry and holographic
duality. Here we consider a SYK model or a chain of SYK models with $N$
Majorana fermion modes coupled to another SYK model with $N^2$ Majorana fermion
modes, in which the latter has many more degrees of freedom and plays the role
as a thermal bath. For a single SYK model coupled to the thermal bath, we show
that although the Lyapunov exponent is still proportional to temperature, it
monotonically decreases from $2\pi/\beta$ ($\beta=1/(k_BT)$, $T$ is
temperature) to zero as the coupling strength to the thermal bath increases.
For a chain of SYK models, when they are uniformly coupled to the thermal bath,
we show that the butterfly velocity displays a crossover from a
$\sqrt{T}$-dependence at relatively high temperature to a linear $T$-dependence
at low temperature, with the crossover temperature also controlled by the
coupling strength to the thermal bath. If only the end of the SYK chain is
coupled to the thermal bath, the model can introduce a spatial dependence of
both the Lyapunov exponent and the butterfly velocity. Our models provide
canonical examples for the study of thermalization within chaotic models.Comment: 28 pages, 9 figures. References adde
Bulk locality from modular flow

We study the reconstruction of bulk operators in the entanglement wedge in
terms of low energy operators localized in the respective boundary region. To
leading order in $N$, the dual boundary operators are constructed from the
modular flow of single trace operators in the boundary subregion. The
appearance of modular evolved boundary operators can be understood due to the
equality between bulk and boundary modular flows and explicit formulas for bulk
operators can be found with a complete understanding of the action of bulk
modular flow, a difficult but in principle solvable task. We also obtain an
expression when the bulk operator is located on the Ryu-Takayanagi surface
which only depends on the bulk to boundary correlator and does not require the
explicit use of bulk modular flow. This expression generalizes the geodesic
operator/OPE block dictionary to general states and boundary regions.Comment: 36 pages, 2 figure
Multi-photon production in the Type-I 2HDM

This paper presents a study of a possible contribution to a Higgs boson
signal in the $hh\to \gamma\gamma\gamma\gamma$ channel due to $H\to hh$ decays,
in the framework of the CP-conserving 2-Higgs Doublet Model Type-I (2HDM-I),
where the heavier of the two CP-even Higgs bosons defined herein, $H$, is the
SM-like Higgs state observed with a mass of 125 GeV at the Large Hadron
Collider (LHC). We perform a broad scan of the 2HDM-I parameter space, in
presence of both up-to-date theoretical and experimental constraints, in order
to extract the interesting regions yielding such a signal. Then, after
validating our numerical framework against public experimental analyses carried
out at the LHC, we proceed to assess its scope in constraining and/or
extracting the $gg\to H\to hh\to \gamma\gamma\gamma\gamma$ signal in presence
of a sophisticated Monte Carlo (MC) simulation. We find that, over a
substantial region of the 2HDM-I parameter space presently un-accessible, the
LHC will be able to establish such a potential signature in the next 2--3
years.Comment: 14 pages, 7 figures, corrected Figure.4 (c) and typo
Lifshitz entanglement entropy from holographic cMERA

We study entanglement entropy in free Lifshitz scalar field theories
holographically by employing the metrics proposed by Nozaki, Ryu and Takayanagi
in \cite{Nozaki:2012zj} obtained from a continuous multi-scale entanglement
renormalisation ansatz (cMERA). In these geometries we compute the minimal
surface areas governing the entanglement entropy as functions of the dynamical
exponent $z$ and we exhibit a transition from an area law to a volume law
analytically in the limit of large $z$. We move on to explore the effects of a
massive deformation, obtaining results for any $z$ in arbitrary dimension. We
then trigger a renormalisation group flow between a Lifshitz theory and a
conformal theory and observe a monotonic decrease in entanglement entropy along
this flow. We focus on strip regions but also consider a disc in the undeformed
theory.Comment: 17 pages, v2: references added and improved discussions, v3:
  published versio
Towards the cold atom analog false vacuum

Analog condensed matter systems present an exciting opportunity to simulate
early Universe models in table-top experiments. We consider a recent proposal
for an analog condensed matter experiment to simulate the relativistic quantum
decay of the false vacuum. In the proposed experiment, two ultra-cold
condensates are coupled via a time-varying radio-frequency field. The relative
phase of the two condensates in this system is approximately described by a
relativistic scalar field with a potential possessing a series of false and
true vacuum local minima. If the system is set up in a false vacuum, it would
then decay to a true vacuum via quantum mechanical tunnelling. Should such an
experiment be realized, it would be possible to answer a number of open
questions regarding non-perturbative phenomena in quantum field theory and
early Universe cosmology. In this paper, we illustrate a possible obstruction:
the time-varying coupling that is invoked to create a false vacuum for the
long-wavelength modes of the condensate leads to a destabilization of shorter
wavelength modes within the system via parametric resonance. We focus on an
idealized setup in which the two condensates have identical properties and
identical background densities. Describing the system by the coupled
Gross-Pitaevskii equations (GPE), we use the machinery of Floquet theory to
perform a linear stability analysis, calculating the wavenumber associated with
the first instability band for a variety of experimental parameters. However,
we demonstrate that, by tuning the frequency of the time-varying coupling, it
may be possible to push the first instability band outside the validity of the
GPE, where dissipative effects are expected to damp any instabilities. This
provides a viable range of experimental parameters to perform analog
experiments of false vacuum decay.Comment: v1: 30 pages + appendices, 9 figures, to be submitted to JHEP; v2:
  Matches published version. Minor revisions, results unchange
On multi-field flows in gravity and holography

We perform a systematic analysis of flow-like solutions in theories of
Einstein gravity coupled to multiple scalar fields, which arise as holographic
RG flows as well as in the context of cosmological solutions driven by scalars.
We use the first order formalism and the superpotential formulation to classify
solutions close to generic extrema of the scalar potential, and close to
"bounces," where the flow is inverted in some or all directions and the
superpotential becomes multi-valued. Although the superpotential formulation
contains a large redundancy, we show how this can be completely lift by
suitable regularity conditions. We place the first order formalism in the
context of Hamilton-Jacobi theory, where we discuss the possibility of
non-gradient flows and their connection to non-separable solutions of the
Hamilton-Jacobi equation. We argue that non-gradient flows may be useful in the
presence of global symmetries in the scalar sector.Comment: 57 pages, 8 figure
New Physics Opportunities for Long-Lived Particles at Electron-Proton
  Colliders

Future electron-proton collider proposals like the LHeC or the FCC-eh can
supply 1/ab of collisions with a center-of-mass energy in the TeV range, while
maintaining a clean experimental environment more commonly associated with
lepton colliders. We point out that this makes electron-proton colliders
ideally suited to probe BSM signatures with final states that look like
"hadronic noise" in the high-energy, pile-up-rich environment of hadron
colliders. We focus on the generic vector boson fusion production mechanism,
which is available for all BSM particles with electroweak charges at mass
scales far above the reach of most lepton colliders. This is in contrast to
previous BSM studies at these machines, which focused on BSM processes with
large production rates from the asymmetric initial state. We propose to exploit
the unique experimental environment in the search for long-lived particle
signals arising from Higgsinos or exotic Higgs decays. At electron-proton
colliders, the soft decay products of long-lived Higgsinos can be explicitly
reconstructed ("displaced single pion"), and very short lifetimes can be
probed. We find that electron-proton colliders can explore significant regions
of BSM parameter space inaccessible to other collider searches, with important
implications for the design of such machines.Comment: 16 pages, 11 figure
Measurement of the underlying event activity in inclusive Z boson
  production in proton-proton collisions at $\sqrt{s} = $ 13 TeV

This paper presents a measurement of the underlying event activity in
proton-proton collisions at a center-of-mass energy of 13 TeV, performed using
inclusive Z boson production events collected with the CMS experiment at the
LHC. The analyzed data correspond to an integrated luminosity of 2.1 fb$^{-1}$.
The underlying event activity is quantified in terms of the charged particle
multiplicity, as well as of the scalar sum of the charged particles' transverse
momenta in different topological regions defined with respect to the Z boson
direction. The distributions are unfolded to the stable particle level and
compared with predictions from various Monte Carlo event generators, as well as
with similar CDF and CMS measurements at center-of-mass energies of 1.96 and 7
TeV respectively.Comment: Replaced with the published version. Added the journal reference and
  the DOI. All the figures and tables can be found at
  http://cms-results.web.cern.ch/cms-results/public-results/publications/FSQ-16-008/
  (CMS Public Pages