pinecone/core-2020-05-10-deduplication huggingface dataset:
On the one loop $\gamma^{(*)}\to q\bar{q}$ impact factor and the
  exclusive diffractive cross sections for the production of two or three jets

We present the calculation of the impact factor for the $\gamma^{(*)}\to
q\bar{q}$ transition with one loop accuracy in arbitrary kinematics. The
calculation was done within Balitsky's high energy operator expansion. Together
with our previous result for the $\gamma^{(*)}\to q\bar{q} g$ Born impact
factor it allows one to derive cross-sections for 2- (one loop) and 3-jet
(Born) difractive electroproduction. We write such cross sections for the 2 and
3 jet exclusive diffractive electroproduction off a proton in terms of hadronic
matrix elements of Wilson lines. For the 2-jet cross section we demonstrate the
cancellation of IR, collinear and rapidity singularities. Our result can be
directly exploited to describe the recently analyzed data on exclusive dijet
production at HERA and used for the study of jet photoproduction in
ultraperipheral proton or nuclear scattering.Comment: 54 pages, 2 figure
Super-BMS$_3$ algebras from $\mathcal{N}=2$ flat supergravities

We consider two possible flat space limits of three dimensional $\mathcal{N}
= (1,1)$ AdS supergravity. They differ by how the supercharges are scaled with
the AdS radius $\ell$: the first limit (democratic) leads to the usual
super-Poincare theory, while a novel `twisted' theory of supergravity stems
from the second (despotic) limit. We then propose boundary conditions such that
the asymptotic symmetry algebras at null infinity correspond to supersymmetric
extensions of the BMS algebras previously derived in connection to non- and
ultra-relativistic limits of the $\mathcal{N}=(1,1)$ Virasoro algebra in two
dimensions. Finally, we study the supersymmetric energy bounds and find the
explicit form of the asymptotic and global Killing spinors of supersymmetric
solutions in both flat space supergravity theories.Comment: 22 pages, v2 version published in JHE
Non-Abelian bubbles in microstate geometries

We find the first smooth microstate geometries with non-Abelian fields. The
solutions constitute an extension of the BPS three-charge smooth microstates.
These consist in general families of regular supersymmetric solutions with
non-trivial topology, i.e. bubbles, of $\mathcal{N}=1$, $d=5$
Super-Einstein-Yang-Mills theory, having the asymptotic charges of a black hole
or black ring but with no horizon. The non-Abelian fields make their presence
at the very heart of the microstate structure: the physical size of the bubbles
is affected by the non-Abelian topological charge they carry, which combines
with the Abelian flux threading the bubbles to hold them up. Interestingly the
non-Abelian fields carry a set of adjustable continuous parameters that do not
alter the asymptotics of the solutions but modify the local geometry. This
feature can be used to obtain a classically infinite number of microstate
solutions with the asymptotics of a single black hole or black ring.Comment: 27 pages, 1 figure. v2 references added and typos correcte
Phenomenology of Strongly Coupled Chiral Gauge Theories

A sector with QCD-like strong dynamics is common in models of non-standard
physics. Such a model could be accessible in LHC searches if both confinement
and big-quarks charged under the confining group are at the TeV scale.
Big-quark masses at this scale can be explained if the new fermions are chiral
under a new $U(1)^\prime$ gauge symmetry such that their bare masses are
related to the $U(1)^\prime$-breaking and new confinement scales. Here we
present a study of a minimal GUT-motivated and gauge anomaly-free model with
implications for the LHC Run 2 searches. We find that the first signatures of
such models could appear as two gauge boson resonances. The chiral nature of
the model could be confirmed by observation of a $Z^\prime \gamma$ resonance,
where the $Z^\prime$ naturally has a large leptonic branching ratio because of
its kinetic mixing with the hypercharge gauge boson.Comment: Version accepted for publication in JHE
Implications of a High-Mass Diphoton Resonance for Heavy Quark Searches

Heavy vector-like quarks coupled to a scalar $S$ will induce a coupling of
this scalar to gluons and possibly (if electrically charged) photons. The decay
of the heavy quark into $Sq$, with $q$ being a Standard Model quark, provides,
if kinematically allowed, new channels for heavy quark searches. Inspired by
naturalness considerations, we consider the case of a vector-like partner of
the top quark. For illustration, we show that a singlet partner can be searched
for at the 13$\,$TeV LHC through its decay into a scalar resonance in the
$2\gamma+\ell + X$ final states, especially if the diphoton branching ratio of
the scalar $S$ is further enhanced by the contribution of non coloured
particles. We then show that conventional heavy quark searches are also
sensitive to this new decay mode, when $S$ decays hadronically, by slightly
tightening the current selection cuts. Finally, we comment about the
possibility of disentangling, by scrutinising appropriate kinematic
distributions, heavy quark decays to $St$ from other standard decay modes.Comment: 8 pages, 3 figures and 1 table; v3: typos fixed. Matches published
  versio
Jet substructure using semi-inclusive jet functions within SCET

We propose a new method to evaluate jet substructure observables in inclusive
jet measurements, based upon semi-inclusive jet functions in the framework of
Soft Collinear Effective Theory (SCET). As a first example, we consider the jet
fragmentation function, where a hadron $h$ is identified inside a fully
reconstructed jet. We introduce a new semi-inclusive fragmenting jet function
${\mathcal G}^h_i(z= \omega_J/\omega,z_h=\omega_h/\omega_J,\omega_J, R,\mu)$,
which depends on the jet radius $R$ and the large light-cone momenta of the
parton `$i$' initiating the jet ($\omega$), the jet ($\omega_J$), and the
hadron $h$ ($\omega_h$). The jet fragmentation function can then be expressed
as a semi-inclusive observable, in the spirit of actual experimental
measurements, rather than as an exclusive one. We demonstrate the consistency
of the effective field theory treatment and standard perturbative QCD
calculations of this observable at next-to-leading order (NLO). The
renormalization group (RG) equation for the semi-inclusive fragmenting jet
function ${\mathcal G}_i^h(z,z_h, \omega_J, R,\mu)$ are also derived and shown
to follow exactly the usual timelike DGLAP evolution equations for
fragmentation functions. The newly obtained RG equations can be used to perform
the resummation of single logarithms of the jet radius parameter $R$ up to
next-to-leading logarithmic (NLL$_R$) accuracy. In combination with the fixed
NLO calculation, we obtain NLO+NLL$_R$ results for the hadron distribution
inside the jet. We present numerical results for $pp\to(\mathrm{jet}\,h)X$ in
the new framework, and find excellent agreement with existing LHC experimental
data.Comment: 28 pages, 6 figures, published versio
Challenges and opportunities for heavy scalar searches in the $t\bar t$
  channel at the LHC

Heavy scalar and pseudoscalar resonance searches through the $gg\rightarrow
S\rightarrow t\bar t$ process are challenging due to the peculiar behavior of
the large interference effects with the standard model $t\bar t$ background.
Such effects generate non-trivial lineshapes from additional relative phases
between the signal and background amplitudes. We provide the analytic
expressions for the differential cross sections to understand the interference
effects in the heavy scalar signal lineshapes. We extend our study to the case
of CP-violation and further consider the effect of bottom quarks in the
production and decay processes. We also evaluate the contributions from
additional particles to the gluon fusion production process, such as stops and
vector-like quarks, that could lead to significant changes in the behavior of
the signal lineshapes. Taking into account the large interference effects, we
perform lineshape searches at the LHC and discuss the importance of the
systematic uncertainties and smearing effects. We present projected
sensitivities for two LHC performance scenarios to probe the $gg\rightarrow S
\rightarrow t\bar t$ channel in various models.Comment: 44 pages, 17 figures; v2: minor updates, reference added, match the
  published version on JHE
Large curvature and background scale independence in single-metric
  approximations to asymptotic safety

In single-metric approximations to the exact renormalization group (RG) for
quantum gravity, it has been not been clear how to treat the large curvature
domain beyond the point where the effective cutoff scale $k$ is less than the
lowest eigenvalue of the appropriate modified Laplacian. We explain why this
puzzle arises from background dependence, resulting in Wilsonian RG concepts
being inapplicable. We show that when properly formulated over an ensemble of
backgrounds, the Wilsonian RG can be restored. This in turn implies that
solutions should be smooth and well defined no matter how large the curvature
is taken. Even for the standard single-metric type approximation schemes, this
construction can be rigorously derived by imposing a modified Ward identity
(mWI) corresponding to rescaling the background metric by a constant factor.
However compatibility in this approximation requires the space-time dimension
to be six. Solving the mWI and flow equation simultaneously, new variables are
then derived that are independent of overall background scale.Comment: 34 pages, 2 figures; various small improvement
A Landscape of Field Theories

Studying a quantum field theory involves a choice of space-time manifold and
a choice of background for any global symmetries of the theory. We argue that
many more choices are possible when specifying the background. In the context
of branes in string theory, the additional data corresponds to a choice of
supergravity tensor fluxes. We propose the existence of a landscape of field
theory backgrounds, characterized by the space-time metric, global symmetry
background and a choice of tensor fluxes. As evidence for this landscape, we
study the supersymmetric six-dimensional (2,0) theory compactified to two
dimensions. Different choices of metric and flux give rise to distinct
two-dimensional theories, which can preserve differing amounts of
supersymmetry.Comment: 33 pages, LaTe
Boosting the charged Higgs search prospects using jet substructure at
  the LHC

Charged Higgs bosons are predicted in variety of theoretically well-motivated
new physics models with extended Higgs sectors. In this study, we focus on a
type-II two Higgs doublet model (2HDM-II) and consider a heavy charged Higgs
with its mass ranging from 500 GeV to 1 TeV as dictated by the $b\to s\gamma$
constraints which render $M_{H^\pm}>480$ GeV. We study the dominant production
mode $H^\pm t$ associated production with $H^\pm \to W^\pm A$ being the
dominant decay channel when the pseudoscalar $A$ is considerably lighter. For
such a heavy charged Higgs, both the decay products $W^\pm$ and $A$ are
relatively boosted. In such a scenario, we apply the jet substructure analysis
of tagging the fat pseudoscalar and $W$ jets in order to eliminate the standard
model background efficiently. We perform a detailed detector simulation for the
signal and background processes at the 14 TeV LHC. We introduce various
kinematical cuts to determine the signal significance for a number of benchmark
points with charged Higgs boson mass from 500 GeV to 1 TeV in the $W^\pm A$
decay channel. Finally we perform a multivariate analysis utilizing a boosted
decision tree algorithm to optimize these significances.Comment: 25 pages, 7 Tables, 12 figures, Matches Published Version in JHE
Entanglement Growth after a Global Quench in Free Scalar Field Theory

We compute the entanglement and R\'enyi entropy growth after a global quench
in various dimensions in free scalar field theory. We study two types of
quenches: a boundary state quench and a global mass quench. Both of these
quenches are investigated for a strip geometry in 1, 2, and 3 spatial
dimensions, and for a spherical geometry in 2 and 3 spatial dimensions. We
compare the numerical results for massless free scalars in these geometries
with the predictions of the analytical quasiparticle model based on EPR pairs,
and find excellent agreement in the limit of large region sizes. At subleading
order in the region size, we observe an anomalous logarithmic growth of
entanglement coming from the zero mode of the scalar.Comment: v2: references added, minor improvements; v1: 32 pages, 9 figure
Prompt atmospheric neutrino fluxes: perturbative QCD models and nuclear
  effects

We evaluate the prompt atmospheric neutrino flux at high energies using three
different frameworks for calculating the heavy quark production cross section
in QCD: NLO perturbative QCD, $k_T$ factorization including low-$x$
resummation, and the dipole model including parton saturation. We use QCD
parameters, the value for the charm quark mass and the range for the
factorization and renormalization scales that provide the best description of
the total charm cross section measured at fixed target experiments, at RHIC and
at LHC. Using these parameters we calculate differential cross sections for
charm and bottom production and compare with the latest data on forward charm
meson production from LHCb at $7$ TeV and at $13$ TeV, finding good agreement
with the data. In addition, we investigate the role of nuclear shadowing by
including nuclear parton distribution functions (PDF) for the target air
nucleus using two different nuclear PDF schemes. Depending on the scheme used,
we find the reduction of the flux due to nuclear effects varies from $10\%$ to
$50 \%$ at the highest energies. Finally, we compare our results with the
IceCube limit on the prompt neutrino flux, which is already providing valuable
information about some of the QCD models.Comment: 61 pages, 25 figures, 11 table
Exceptional F(4) Higher-Spin Theory in AdS(6) at One-Loop and other
  Tests of Duality

We study the higher-spin gauge theory in six-dimensional anti-de Sitter space
$AdS_6$ that is based on the exceptional Lie superalgebra $F(4)$. The relevant
higher-spin algebra was constructed in arXiv:1409.2185 [hep-th]. We determine
the spectrum of the theory and show that it contains the physical fields of the
Romans $F(4)$ gauged supergravity. The full spectrum consists of an infinite
tower of unitary supermultiplets of $F(4)$ which extend the Romans multiplet to
higher spins plus a single short supermultiplet.
  Motivated by applications to this novel supersymmetric higher-spin theory as
well as to other theories, we extend the known one-loop tests of $AdS/CFT$
duality in various directions. The spectral zeta-function is derived for the
most general case of fermionic and mixed-symmetry fields, which allows one to
test the Type-A and B theories and supersymmetric extensions thereof in any
dimension. We also study higher-spin doubletons and partially-massless fields.
While most of the tests are successfully passed, the Type-B theory in all even
dimensional anti-de Sitter spacetimes presents an interesting puzzle: the free
energy as computed from the bulk is not equal to that of the free fermion on
the CFT side, though there is some systematics to the discrepancy.Comment: 45 pages + 30 pages of Appendices; typo fixed, notation improve
Momentum and charge transport in non-relativistic holographic fluids
  from Ho\v{r}ava gravity

We study the linearized transport of transverse momentum and charge in a
conjectured field theory dual to a black brane solution of Horava gravity with
Lifshitz exponent $z=1$. As expected from general hydrodynamic reasoning, we
find that both of these quantities are diffusive over distance and time scales
larger than the inverse temperature. We compute the diffusion constants and
conductivities of transverse momentum and charge, as well the ratio of shear
viscosity to entropy density, and find that they differ from their relativistic
counterparts. To derive these results, we propose how the holographic
dictionary should be modified to deal with the multiple horizons and differing
propagation speeds of bulk excitations in Horava gravity. When possible, as a
check on our methods and results, we use the covariant Einstein-Aether
formulation of Horava gravity, along with field redefinitions, to re-derive our
results from a relativistic bulk theory.Comment: v2: minor changes, added references; 30 pages, 1 figur
Duality group actions on fermions

In this short paper we look at the action of T-duality and string duality
groups on fermions, in maximally-supersymmetric theories and related theories.
Briefly, we argue that typical duality groups such as SL(2,Z) have sign
ambiguities in their actions on fermions, and propose that pertinent duality
groups be extended by Z_2, to groups such as the metaplectic group.
Specifically, we look at duality groups arising from mapping class groups of
tori in M theory compactifications, T-duality, ten-dimensional type IIB
S-duality, and (briefly) four-dimensional N=4 super Yang-Mills, and in each
case, propose that the full duality group is a nontrivial Z_2 extension of the
duality group acting on bosonic degrees of freedom, to more accurately describe
possible actions on fermions. We also walk through U-duality groups for
toroidal compactifications to nine, eight, and seven dimensions, which enables
us to perform cross-consistency tests of these proposals.Comment: 20 pages, LaTeX; v2: references adde
Minimal Mirror Twin Higgs

In a Mirror Twin World with a maximally symmetric Higgs sector the little
hierarchy of the Standard Model can be significantly mitigated, perhaps
displacing the cutoff scale above the LHC reach. We show that consistency with
observations requires that the Z2 parity exchanging the Standard Model with its
mirror be broken in the Yukawa couplings. A minimal such effective field
theory, with this sole Z2 breaking, can generate the Z2 breaking in the Higgs
sector necessary for the Twin Higgs mechanism. The theory has constrained and
correlated signals in Higgs decays, direct Dark Matter Detection and Dark
Radiation, all within reach of foreseen experiments, over a region of parameter
space where the fine-tuning for the electroweak scale is 10-50%. For dark
matter, both mirror neutrons and a variety of self-interacting mirror atoms are
considered. Neutrino mass signals and the effects of a possible additional Z2
breaking from the vacuum expectation values of B-L breaking fields are also
discussed.Comment: 42 pages, 8 figures; additional references and discussion on higgs
  physics and dark matte
Neutrino mass from M Theory SO(10)

We study the origin of neutrino mass from $SO(10)$ arising from $M$ Theory
compactified on a $G_2$-manifold. This is linked to the problem of the breaking
of the extra $U(1)$ gauge group, in the $SU(5)\times U(1)$ subgroup of
$SO(10)$, which we show can achieved via a (generalised) Kolda-Martin
mechanism. The resulting neutrino masses arise from a combination of the seesaw
mechanism and induced R-parity breaking contributions. The rather complicated
neutrino mass matrix is analysed for one neutrino family and it is shown how
phenomenologically acceptable neutrino masses can emerge.Comment: 32 pages, 12 figure
Branes and the Kraft-Procesi Transition

The Coulomb and Higgs branches of certain 3d N=4 gauge theories can be
understood as closures of nilpotent orbits. Recently, a new theorem by Namikawa
suggests that this is the simplest possible case, thus giving this class a
special role. In this note we use branes to reproduce the mathematical work by
Kraft and Procesi. It studies the classification of all nilpotent orbits for
classical groups and it characterizes an inclusion relation via minimal
singularities. We show how these minimal singularities arise naturally in the
Type IIB superstring embedding of the 3d A-type theories. The Higgs mechanism
can be used to remove the minimal singularity, corresponding to a transition in
the brane configuration that induces a new effective 3d theory. This reproduces
the Kraft-Procesi results, endowing the family of gauge theories with a new
underlying structure. We provide an efficient procedure for computing such
brane transitions.Comment: 64 pages, 37 figures, 16 table
Witten indices of abelian M5 brane on $\mathbb{R}\times S^5$

Witten indices and partition functions are computed for abelian 6d tensor and
hypermultiplets on $\mathbb{R}\times S^5$ in Lorentzian signature in an R gauge
field background which preserves some supersymmetry. We consider a generic
supersymmetric squashing that also admits squashing of the Hopf fiber. Wick
rotation to Euclidean M5 brane amounts to Wick rotation of squashing parameters
and the hypermultiplet mass parameter. We compute Casimir energies for tensor
and hypermultiplets separately for general squashing, and match these with the
corresponding gravitational anomaly polynomials. We extract Witten indices on
$\mathbb{R}\times \mathbb{CP}^2$ and find that this is zero, again matching
with the vanishing anomaly polynomial on an odd dimensional space.Comment: 48 pages, several clarifications adde
On the trace anomaly of a Weyl fermion

We calculate the trace anomaly of a Weyl fermion coupled to gravity by using
Fujikawa's method supplemented by the choice of a consistent regulator. The
latter is constructed out of Pauli-Villars regulating fields. The motivation
for presenting such a calculation stems from recent studies that suggest that
the trace anomaly of chiral fermions in four dimensions might contain an
imaginary part proportional to the Pontryagin density. We find that the trace
anomaly of a Weyl fermion is given by half the trace anomaly of a Dirac
fermion, so that no imaginary part proportional to the Pontryagin density is
seen to arise.Comment: 25 pages, added references and acknowledgment
There and back again: A T-brane's tale

T-branes are supersymmetric configurations described by multiple Dp-branes
with worldvolume flux and non-commuting vacuum expectation values for two of
the worldvolume scalars. When these values are much larger than the string
scale this description breaks down. We show that in this regime the correct
description of T-branes is in terms of a single Dp-brane, whose worldvolume
curvature encodes the T-brane data. We present the tale of the journey to reach
this picture, which takes us through T-dualities and rugby-ball-shaped brane
configurations that no eye has gazed upon before.Comment: 19 pages, 4 figure
Shape Dependence of Holographic R\'enyi Entropy in General Dimensions

We present a holographic method for computing the response of R\'enyi
entropies in conformal field theories to small shape deformations around a flat
(or spherical) entangling surface. Our strategy employs the stress tensor
one-point function in a deformed hyperboloid background and relates it to the
coefficient in the two-point function of the displacement operator. We obtain
explicit numerical results for $d=3,\dots,6$ spacetime dimensions, and also
evaluate analytically the limits where the R\'enyi index approaches 1 and 0 in
general dimensions. We use our results to extend the work of 1602.08493 and
disprove a set of conjectures in the literature regarding the relations between
the R\'enyi shape dependence and the conformal weight of the twist operator. We
also extend our analysis beyond leading order in derivatives in the bulk theory
by studying Gauss-Bonnet gravity.Comment: 33 pages, 4 figure