pinecone/core-2020-05-10-deduplication huggingface dataset:
Multiparticle one-loop amplitudes and S-duality in closed superstring
  theory

Explicit expressions for one-loop five supergraviton scattering amplitudes in
both type II superstring theories are determined by making use of the pure
spinor formalism. The type IIB amplitude can be expressed in terms of a
doubling of ten-dimensional super Yang--Mills tree amplitude, while the type
IIA amplitude has additional pieces that cannot be expressed in that manner. We
evaluate the coefficients of terms in the analytic part of the low energy
expansion of the amplitude, which correspond to a series of terms in an
effective action of the schematic form D^{2k}R^5 for 0\le k \le 5 (where R is
the Riemann curvature). Comparison with earlier analyses of the tree amplitudes
and of the four-particle one-loop amplitude leads to an interesting extension
of the action of SL(2,Z) S-duality on the moduli-dependent coefficients in the
type IIB theory. We also investigate closed-string five-particle amplitudes
that violate conservation of the U(1) R-symmetry charge -- processes that are
forbidden in supergravity. The coefficients of their low energy expansion are
shown to agree with S-duality systematics. A less detailed analysis is also
given of the six-point function, resulting in the vanishing of the analytic
parts of the R^6 and D^4 R^6 interactions in the ten-dimensional effective
action, but not in lower dimensions.Comment: 62 pages, Mathematica notebook on integral expansion included in
  submission. v2: minor modifications, references added, matches published
  versio
Universal Chern-Simons partition functions as quadruple Barnes'
  gamma-functions

We show that both perturbative and non-perturbative parts of universal
partition functions of Chern-Simons theory on 3d sphere are ratios of four over
four Barnes' quadruple gamma functions with arguments given by linear
combinations of universal parameters. Since nonperturbative part of partition
function is essentially a universal compact simple Lie group's volume, latter
appears to be expressed through quadruple Barnes' functions, also. For SU(N)
values of parameters recurrent relations on Barnes' functions give the proof of
level-rank duality of complete partition function, thus extending that duality
on non-integer level and rank. We note that integral representation of
universal partition function is defined on few disjoint regions in parameters'
space, corresponding to different signs of real parts of parameters, and
introduce a framework for discussion of analytic continuation of partition
functions(s) from these regions. Although initial integral representation is
symmetric under all permutations of parameters (which corresponds particularly
to $N \rightarrow -N$ duality of gauge theories with classical groups),
analytic continuations are not symmetric under transposition of parameters with
different signs of their real parts. For the particular case of SU(N)
Chern-Simons this asymmetry appears to be the Kinkelin's functional equation
(reflection relation) for Barnes' G-function.Comment: 15 page
Cornering electroweakinos at the LHC

Squeezed supersymmetric spectra are challenging for the LHC searches based on
a sizable missing energy and hard visible particles. One such scenario consists
of chargino/second-lightest neutralino NLSPs and a lightest neutralino LSP with
a relatively small mass gap (10-50GeV). In this note, we explore search
strategies to better probe this parameter space. We focus on the three-lepton
plus missing energy channel arising from the chargino/second-lightest
neutralino associated production, and we investigate the role of a relatively
hard initial state radiation (ISR) jet. In addition to typical kinematic
variables, such as the minimum lepton pair invariant mass, we propose an
angular separation variable and two ratio variables which capitalize on the
main kinematic features; leptons stay relatively soft under the boost from ISR
and a sizable missing energy arises only in tight correlation with the ISR
boost. With 300/fb of data at the 14 TeV LHC, we expect to probe
electroweakinos up to 320 (700) GeV with 30GeV mass-gap and up to 220 (620) GeV
with 20GeV mass-gap if gauginos decay via gauge bosons (light sleptons). We
emphasize that the three-lepton channel is technically challenging for mass-gap
below 12GeV.Comment: 23 pages, 9 figure
The density in the density of states method

It has been suggested that for QCD at finite baryon density the distribution
of the phase angle, i.e. the angle defined as the imaginary part of the
logarithm of the fermion determinant, has a simple Gaussian form. This
distribution provides the density in the density of states approach to the sign
problem. We calculate this phase angle distribution using i) the hadron
resonance gas model; and ii) a combined strong coupling and hopping parameter
expansion in lattice gauge theory. While the former model leads only to a
Gaussian distribution, in the latter expansion we discover terms which cause
the phase angle distribution to deviate, by relative amounts proportional to
powers of the inverse lattice volume, from a simple Gaussian form. We show that
despite the tiny inverse-volume deviation of the phase angle distribution from
a simple Gaussian form, such non-Gaussian terms can have a substantial impact
on observables computed in the density of states/reweighting approach to the
sign problem.Comment: 43 pages, 4 figure
Dual 2d CFT Identification of Extremal Black Rings from Holes

Five dimensional Einstein gravity vacuum solutions in general fall into two
classes of black rings with horizon topology S^2 \times S^1, and black holes
with horizon topology S^3. These solutions are specified by their mass and two
spins. There are "overlapping" regions of this parameter space where one has
extremal rings and holes of the same spins. We show that for such regions the
hole has generically a larger entropy than the ring, and likewise, the central
charge of the proposed chiral 2d CFT dual to the hole is larger than that of
the ring. For special places of this overlapping region where one of the spins
tends to zero, the entropies of the extremal ring and hole also tend to zero
and essentially become equal. In this case we are dealing with Extremal
Vanishing Horizon (EVH) black holes or rings. The near horizon geometry of the
near-EVH hole and rings both contain locally AdS_3 throats, providing a basis
for the EVH/CFT proposal, a 2d CFT description of the low energy excitations of
EVH hole or ring. We argue how the near-EVH hole and near-EVH ring can be
distinguished from this dual 2d CFT viewpoint: The hole is a thermal state with
zero temperature in the left sector and finite temperature in the right, while
the ring is a generic state in the ground state (of the CFT on the plane) in
the left sector and a thermal state in the right. The latter is part of the
Hilbert space of the 2d CFT obtained in the Discrete Light Cone Quantization
(DLCQ).Comment: 21 pages, 2 figures. v2, accepted in JHE
Fluctuating Black Hole Horizons

In this paper we treat the black hole horizon as a physical boundary to the
spacetime and study its dynamics following from the Gibbons-Hawking-York
boundary term. Using the Kerr black hole as an example we derive an effective
action that describes, in the large wave number limit, a massless Klein-Gordon
field living on the average location of the boundary. Complete solutions can be
found in the small rotation limit of the black hole. The formulation suggests
that the boundary can be treated in the same way as any other matter
contributions. In particular, the angular momentum of the boundary matches
exactly with that of the black hole, suggesting an interesting possibility that
all charges (including the entropy) of the black hole are carried by the
boundary. Using this as input, we derive predictions on the Planck scale
properties of the boundary.Comment: References added, nature of boundary stress tensor clarified,
  discussion of statistics refined and a mistake with Hawking temperature
  corrected, 16 pages; version to appear in journa
$T_7$ Flavor Model in Three Loop Seesaw and Higgs Phenomenology

We propose a new type of radiative seesaw model in which observed neutrino
masses are generated through a three-loop level diagram in combination with
tree-level type-II seesaw mechanism in a renormalizable theory. We introduce a
Non-abelian flavor symmetry $T_7$ in order to constrain the form of Yukawa
interactions and Higgs potential. Although several models based on a
Non-abelian flavor symmetry predict the universal coupling constants among the
standard model like Higgs boson and charged leptons, which is disfavored by the
current LHC data, our model can avoid such a situation. We show a benchmark
parameter set that is consistent with the current experimental data, and we
discuss multi-muon events as a key collider signature to probe our model.Comment: Footnote 6 is slightly modifie
Seiberg-like Dualities for 3d N=2 Theories with SU(N) gauge group

We work out Seiberg-like dualities for 3d $\mathcal{N}=2$ theories with SU(N)
gauge group. We use the $SL(2,\mathbb{Z})$ action on 3d conformal field
theories with U(1) global symmetry. One of generator S of $SL(2,\mathbb{Z})$
acts as gauging of the U(1) global symmetry. Utilizing $S=S^{-1}$ up to charge
conjugation, we obtain Seiberg-like dual of SU(N) theories by gauging
topological U(1) symmetry of the Seiberg-like dual of U(N) theories with the
same matter content. We work out the Aharony dualities for SU(N) gauge theory
with $N_f$ fundamental/anti-fundamnetal flavors, with/without one adjoint
matter with the superpotential. We also work out the Giveon-Kutasov dualities
for SU(N) gauge theory with Chern-Simons term and with $N_f$
fundamental/anti-fundamental flavors. For all the proposed dualities, we give
various evidences such as chiral ring matching and the superconformal index
computations. We find the perfect matchings.Comment: 29 pages; SU(N) dual with N_f=N_c clarifie
Constraining Super-light Sterile Neutrino Scenario by JUNO and RENO-50

The Super-light Sterile Neutrino Scenario (SSNS) has been proposed in the
literature to explain the suppression of the upturn in the low energy solar
data. In this scenario, the mass splitting between the new mass eigenstate,
$\nu_0$ and the standard $\nu_1$ is of order of $\Delta m_{01}^2\sim 10^{-5}$
eV$^2$. Reactor neutrino experiments with baseline larger than $\sim$20 km can
help us to probe this scenario. We study the potential of upcoming JUNO and
RENO-50 reactor experiments for discovering the superlight sterile neutrino or
constraining its mixing parameters. We study the dependence of sensitivity to
the SNSS and find that the proposed JUNO setup is very close to the optimal
setup for probing the SSNS.Comment: 12 pages, 5 figure
Dimensional Oxidation of Non-geometric Fluxes in Type II Orientifolds

Some aspects of string compactifications with non-geometric fluxes are
revisited in the light of recent progress in double field theory. After
rederiving the general form of these fluxes, we consider the proposed flux
induced four-dimensional effective superpotential and oxidize its induced
scalar potential to terms in a ten-dimensional action. This analysis is
performed independently for an explicit toroidal type IIA and its T-dual type
IIB orientifold. We show in detail that the result of this bottom-up approach
is compatible with the gauged supergravity motivated flux formulation of the
double field theory action in both the NS-NS and the R-R sector.Comment: 34 pages, v2: typos corrected, refs added, v3: major revision of the
  introduction and sec.(2.5), final version to be publishe
Higher-spin correlators

We analyze the properly normalized three-point correlator of two protected
scalar operators and one higher spin twist-two operator in N=4 super
Yang-Mills, in the limit of large spin j. The relevant structure constant can
be extracted from the OPE of the four-point correlator of protected scalar
operators. We show that crossing symmetry of the four point correlator plus a
judicious guess for the perturbative structure of the three-point correlator,
allow to make a prediction for the structure constant at all loops in
perturbation theory, up to terms that remain finite as the spin becomes large.
Furthermore, the expression for the structure constant allows to propose an
expression for the all loops four-point correlator G(u,v), in the limit u,v ->
0. Our predictions are in perfect agreement with the large j expansion of
results available in the literature.Comment: 14 pages,v2:minor changes, refs adde
Running Couplings in Quantum Theory of Gravity Coupled with Gauge Fields

In this paper we study the coupled system of non-abelian gauge fields with
higher-derivative gravity. Charge renormalization is investigated in this
coupled system. It is found that the leading term in the gauge coupling beta
function comes due to interaction of gauge fields with gravitons. This is shown
to be a universal quantity in the sense that it doesn't depend on the gauge
coupling and the gauge group, but may depend on the other couplings of the
action (gravitational and matter). The coupled system is studied at one-loop.
It is found that the leading term of gauge beta function is zero at one-loop in
four dimensions. The effect of gauge fields on the running of gravitational
couplings is investigated. The coupled system of gauge field with
higher-derivative gravity is shown to satisfy unitarity when quantum
corrections are taken in to account. Moreover, it is found that Newton constant
goes to zero at short distances. In this renormalizable and unitary theory of
gauge field coupled with higher-derivative gravity, the leading term of the
gauge beta function, found to be universal for all gauge groups, is further
studied in more detail by isolating it in the context of abelian gauge theories
coupled with gravity in four dimensions. Using self-duality of abelian gauge
theories in four dimensions, this term of the gauge beta function is shown to
be zero to all loops. This is found to be independent of the gravity action,
regularization scheme and gauge fixing condition. An explicit one-loop
computation for arbitrary gravity action further demonstrates the vanishing of
this term in the gauge beta function in four dimensions, independent of the
regularization scheme and gauge fixing condition. Consequences of this are
discussed.Comment: 1+42 pages, 7 figure
Complete Nagy-Soper subtraction for next-to-leading order calculations
  in QCD

We extend the Helac-Dipoles package with the implementation of a new
subtraction formalism, first introduced by Nagy and Soper in the formulation of
an improved parton shower. We discuss a systematic, semi-numerical approach for
the evaluation of the integrated subtraction terms for both massless and
massive partons, which provides the missing ingredient for a complete
implementation. In consequence, the new scheme can now be used as part of a
complete NLO QCD calculation for processes with arbitrary parton masses and
multiplicities. We assess its overall performance through a detailed comparison
with results based on Catani-Seymour subtraction. The importance of random
polarization and color sampling of the external partons is also examined.Comment: 37 pages, 8 tables, 3 figures. References added, version to appear in
  JHE
Matter From Geometry Without Resolution

We utilize the deformation theory of algebraic singularities to study charged
matter in compactifications of M-theory, F-theory, and type IIa string theory
on elliptically fibered Calabi-Yau manifolds. In F-theory, this description is
more physical than that of resolution. We describe how two-cycles can be
identified and systematically studied after deformation. For ADE singularities,
we realize non-trivial ADE representations as sublattices of Z^N, where N is
the multiplicity of the codimension one singularity before deformation. We give
a method for the determination of Picard-Lefschetz vanishing cycles in this
context and utilize this method for one-parameter smooth deformations of ADE
singularities. We give a general map from junctions to weights and demonstrate
that Freudenthal's recursion formula applied to junctions correctly reproduces
the structure of high-dimensional ADE representations, including the 126 of
SO(10) and the 43,758 of E_6. We identify the Weyl group action in some
examples, and verify its order in others. We describe the codimension two
localization of matter in F-theory in the case of heterotic duality or simple
normal crossing and demonstrate the branching of adjoint representations.
Finally, we demonstrate geometrically that deformations correctly reproduce the
appearance of non-simply-laced algebras induced by monodromy around codimension
two singularities, showing the reduction of D_4 to G_2 in an example. A
companion mathematical paper will follow.Comment: 30 pages + references, appendices. v2: references and two figures
  added, typos correcte
Exclusive J/{\psi} production in ultraperipheral collisions at the LHC:
  constrains on the gluon distributions in the proton and nuclei

Using the framework of collinear factorization in perturbative QCD (pQCD), we
analyze the recent data of the LHCb and ALICE collaborations on exclusive
photoproduction of J/{\psi} in ultraperipheral pp and AA collisions,
respectively. We demonstrate that the simultaneous analysis of the proton and
Pb data allows us to reduce the ambiguity of the pQCD description of the
$\gamma p \to J/\psi p$ and $\gamma A \to J/\psi p$ cross sections and, hence,
to place additional constraints on the gluon distributions in the nucleon and
nuclei at small x. We also make predictions for the cross section of coherent
exclusive photoproduction of J/{\psi} in nucleus-nucleus ultraperipheral
collisions accompanied by the electromagnetic excitation of nuclei and the
subsequent neutron emission.Comment: 21 pages, 8 figures, 3 tables. The final version matching the
  published pape
Quartic Quasi-topological Gravity, Black Holes and Holography

In this paper, we derive the field equations of quartic quasi-topological
gravity by varying the action with respect to the metric. Also, we obtain the
linearized graviton equations in the AdS background and find that it is
governed by a second-order field equation as in the cases of Einstein, Lovelock
or cubic quasi-topological gravities. But in contrast to the cubic
quasi-topological gravity, the linearized field equation around a black hole
has fourth-order radial derivative of the perturbation. Moreover, we analyze
the conditions of having ghost free AdS solutions and AdS planar black holes.
In addition, we compute the central charges of the dual conformal field theory
of this gravity theory by studying holographic Weyl anomaly. Finally, we
consider the effect of quartic term on the causality of dual theory in the
tensor channel and show that, in the contrast to the trivial result of cubic
quasi-topological gravity, the existence of both cubic and quartic terms leads
to a non-trivial constraint. However, this constraint does not imply any lower
positive bound on the viscosity/entropy ratio.Comment: 27 pages, 14 figures, minor typos corrected, a comment on bulk
  causality is added, updated to published versio
Holographic EPR Pairs, Wormholes and Radiation

As evidence for the ER=EPR conjecture, it has recently been observed that the
string that is holographically dual to an entangled quark-antiquark pair
separating with (asymptotically) uniform acceleration has a wormhole on its
worldsheet. We point out that a two-sided horizon and a wormhole actually
appear for much more generic quark-antiquark trajectories, which is consistent
with the fact that the members of an EPR pair need not be permanently out of
causal contact. The feature that determines whether the causal structure of the
string worldsheet is trivial or not turns out to be the emission of gluonic
radiation by the dual quark and antiquark. In the strongly-coupled gauge
theory, it is only when radiation is emitted that one obtains an unambiguous
separation of the pair into entangled subsystems, and this is what is reflected
on the gravity side by the existence of the worldsheet horizon.Comment: 1+17+5 pages, 9 figures, v2: added refs, v3: small additions, matches
  published versio
A perturbative QCD study of dijets in p+Pb collisions at the LHC

Inspired by the recent measurements of the CMS collaboration, we report a QCD
study of dijet production in proton+lead collisions at the LHC involving
large-transverse-momentum jets, $p_T \gtrsim 100$ GeV. Examining the inherent
uncertainties of the next-to-leading order perturbative QCD calculations and
their sensitivity to the free proton parton distributions (PDFs), we observe a
rather small, typically much less than 5% clearance for the shape of the dijet
rapidity distribution within approximately 1.5 units around the midrapidity.
Even a more stable observable is the ratio between the yields in the positive
and negative dijet rapidity, for which the baseline uncertainty can be made
negligible by imposing a symmetric jet rapidity acceptance. Both observables
prove sensitive to the nuclear modifications of the gluon distributions, the
corresponding uncertainties clearly exceeding the estimated baseline
uncertainties from the free-proton PDFs and scale dependence. From a
theoretical point of view, these observables are therefore very suitable for
testing the validity of the collinear factorization and have a high potential
to provide precision constraints for the nuclear PDFs.Comment: 16 pages. The version to be published. Figures 6 and 7 replaced. Some
  further discussion adde
Color-Kinematics Duality in Multi-Regge Kinematics and Dimensional
  Reduction

In this note we study the applicability of the color-kinematics duality to
the scattering of two distinguishable scalar matter particles with gluon
emission in QCD, or graviton emission in Einstein gravity. Previous analysis
suggested that direct use of the Bern-Carrasco-Johansson double-copy
prescription to matter amplitudes does not reproduce the gravitational
amplitude in multi-Regge kinematics. This situation, however, can be avoided by
extensions to the gauge theory, while maintaning the same Regge limit. Here we
present two examples of these extensions: the introduction of a scalar contact
interaction and the relaxation of the distinguishability of the scalars. In
both cases new diagrams allow for a full reconstruction of the correct Regge
limit on the gravitational side. Both modifications correspond to theories
obtained by dimensional reduction from higher-dimensional gauge theories.Comment: 16 pages, 1 figure; v2 minor changes, typos corrected. It matches the
  version published in JHE
Current experimental bounds on stop mass in natural SUSY

Motivated by the recent progress of direct search for the productions of stop
pair and sbottom pair at the LHC, we examine the constraints of the search
results on the stop ($\tilde{t}_1$) mass in natural SUSY. We first scan the
parameter space of natural SUSY in the framework of MSSM, considering the
constraints from the Higgs mass, B-physics and electroweak precision
measurements. Then in the allowed parameter space we perform a Monte Carlo
simulation for stop pair production followed by $\tilde{t}_{1} \to t
\tilde{\chi}_{1}^{0}$ or $\tilde{t}_{1} \to b \tilde{\chi}_{1}^{+}$ and sbottom
pair production followed by $\tilde{b}_{1} \to b \tilde{\chi}_{1}^{0}$ or
$\tilde{b}_{1} \to t \tilde{\chi}_{1}^{-}$. Using the combined results of ATLAS
with 20.1 fb$^{-1}$ from the search of $\ell+{\rm jets}+\slashed E_{T}$,
hadronic $t\bar{t}+\slashed E_{T}$ and $2b+\slashed E_{T}$, we find that a stop
lighter than 600 GeV can be excluded at 95% CL in this scenario.Comment: Discussions added, accepted by JHE