pinecone/core-2020-05-10-deduplication huggingface dataset:
Scattering of Giant Magnons in CP^3

We study classical scattering phase of CP^2 dyonic giant magnons in R_t x
CP^3. We construct two-soliton solutions explicitly by the dressing method.
Using these solutions, we compute the classical time delays for the scattering
of giant magnons, and compare them to boundstate S-matrix elements derived from
the conjectured AdS_4/CFT_3 S-matrix by Ahn and Nepomechie in the strong
coupling limit. Our result is consistent with the conjectured S-matrix. The
dyonic solutions play an essential role in revealing the polarization
dependence of scattering phase.Comment: 29 pages; v2: minor corrections; v3: minor corrections, references
  added ; v4: minor corrections ; v5: minor corrections based on the published
  versio
The Generalised Geometry of Type II Non-Geometric Fluxes Under T and S
  Dualities

We examine the flux structures defined by NS-NS superpotentials of Type IIA
and Type IIB string theories compactified on a particular class of internal
spaces which include non-geometric flux contributions due to T duality or
mirror symmetry. This is then extended to the Type IIB R-R sector through the
use of S duality and then finally to its mirror dual Type IIA R-R sector, with
note of how this sector breaks S duality invariance in Type IIA. The nilpotency
and tadpole constraints associated with the fluxes induced by both dualities
are derived, explicitly demonstrated to be mirror invariant and classified in
terms of S duality multiplets. These results are then used to motivate the
postulation of an additional symmetry for internal spaces which are their own
mirror duals and an analysis is done of the resultant constraints for such a
construction.Comment: 59 pages, no figure
Nonlinear Realization of Spontaneously Broken N=1 Supersymmetry
  Revisited

This paper revisits the nonlinear realization of spontaneously broken N=1
supersymmetry. It is shown that the constrained superfield formalism can be
reinterpreted in the language of standard realization of nonlinear
supersymmetry via a new and simpler route. Explicit formulas of actions are
presented for general renormalizable theories with or without gauge
interactions. The nonlinear Wess-Zumino gauge is discussed and relations are
pointed out for different definitions of gauge fields. In addition, a general
procedure is provided to deal with theories of arbitrary Kahler potentials.Comment: 1+18 pages, LaTe
Arithmetic of N=8 Black Holes

The microscopic formula for the degeneracies of 1/8 BPS black holes in type
II string theory compactified on a six dimensional torus can be expressed as a
sum of several terms. One of the terms is a function of the Cremmer-Julia
invariant and gives the leading contribution to the entropy in the large charge
limit. The other terms, which give exponentially subleading contribution,
depend not only on the Cremmer-Julia invariant, but also on the arithmetic
properties of the charges, and in fact exist only when the charges satisfy
special arithmetic properties. We identify the origin of these terms in the
macroscopic formula for the black hole entropy, based on quantum entropy
function, as the contribution from non-trivial saddle point(s) in the path
integral of string theory over the near horizon geometry. These saddle points
exist only when the charge vectors satisfy the arithmetic properties required
for the corresponding term in the microscopic formula to exist. Furthermore the
leading contribution from these saddle points in the large charge limit agrees
with the leading asymptotic behaviour of the corresponding term in the
degeneracy formula.Comment: LaTeX file, 12 page
Generalized Weyl solutions in d=5 Einstein-Gauss-Bonnet theory: the
  static black ring

We argue that the Weyl coordinates and the rod-structure employed to
construct static axisymmetric solutions in higher dimensional Einstein gravity
can be generalized to the Einstein-Gauss-Bonnet theory. As a concrete
application of the general formalism, we present numerical evidence for the
existence of static black ring solutions in Einstein-Gauss-Bonnet theory in
five spacetime dimensions. They approach asymptotically the Minkowski
background and are supported against collapse by a conical singularity in the
form of a disk. An interesting feature of these solutions is that the
Gauss-Bonnet term reduces the conical excess of the static black rings.
Analogous to the Einstein-Gauss-Bonnet black strings, for a given mass the
static black rings exist up to a maximal value of the Gauss-Bonnet coupling
constant $\alpha'$. Moreover, in the limit of large ring radius, the suitably
rescaled black ring maximal value of $\alpha'$ and the black string maximal
value of $\alpha'$ agree.Comment: 43 pages, 14 figure
String theory as a diffusing system

Recent results on the effective non-local dynamics of the tachyon mode of
open string field theory (OSFT) show that approximate solutions can be
constructed which obey the diffusion equation. We argue that this structure is
inherited from the full theory, where it admits a universal formulation. In
fact, all known exact OSFT solutions are superpositions of diffusing surface
states. In particular, the diffusion equation is a spacetime manifestation of
OSFT gauge symmetries.Comment: 1+39 pages, 1 figure; v2: section 4 expanded, main result clarified
  but unchanged, references adde
Tree-level S-matrix of Pohlmeyer reduced form of AdS_5 x S^5 superstring
  theory

With a motivation to find a 2-d Lorentz-invariant solution of the AdS_5 x S^5
superstring we continue the study of the Pohlmeyer-reduced form of this theory.
The reduced theory is constructed from currents of the superstring sigma model
and is classically equivalent to it. Its action is that of
G/H=Sp(2,2)xSp(4)/SU(2)^4 gauged WZW model deformed by an integrable potential
and coupled to fermions. This theory is UV finite and is conjectured to be
related to the superstring theory also at the quantum level. Expanded near the
trivial vacuum it has the same elementary excitations (8+8 massive bosonic and
fermionic 2-d degrees of freedom) as the AdS_5 x S^5 superstring in the
light-cone gauge or near plane-wave expansion. In contrast to the superstring
case, the interaction terms in the reduced action are manifestly 2-d Lorentz
invariant. Since the theory is integrable, its S-matrix should be effectively
determined by the two-particle scattering. Here we explicitly compute the
tree-level two-particle S-matrix for the elementary excitations of the reduced
theory. We find that this S-matrix has the same index structure and group
factorization properties as the superstring S-matrix computed in hep-th/0611169
but has simpler coefficients, depending only on the difference of two
rapidities. While the gauge-fixed form of the reduced action has only the
bosonic SU(2)^4 part of the PSU(2|2) x PSU(2|2) symmetry of the light-cone
superstring spectrum as its manifest symmetry we conjecture that it should also
have a hidden fermionic symmetry that effectively interchanges bosons and
fermions and which should guide us towards understanding the relation between
the two S-matrices.Comment: v2: minor correction
Lifshitz backgrounds from 10d supergravity

We investigate whether 4-dimensional static and cosmological Lifshitz
solutions can be found from deforming the existing (A)dS_4 compactifications in
IIA and IIA* supergravity. Using a well motivated compactification Ansatz on
SU(3)-structure manifolds with 19 undetermined parameters we demonstrate that
this is not the case in ordinary IIA supergravity, thereby generalising
previous nogo results in different ways. On the other hand, for IIA* we
construct explicit cosmological Lifshitz solutions. We also consider solutions
with non-constant scalars and are able to find simple static and cosmological
Lifshitz solutions in IIB* supergravity and a Euclidean Lifshitz solution in
ordinary Euclidean IIB supergravity, which is similar to a non-extremal
deformation of the D-instanton. The latter solutions have z=-2.Comment: 15 pages; References adde
Realistic Flipped SU(5) from Orbifold SO(10)

We propose a realistic flipped SU(5) model derived from a five-dimensional
orbifold SO(10) model. The Standard Model (SM) fermion masses and mixings are
explained by combining the traditional Froggatt-Nielsen mechanism with the
five-dimensional wave function profiles of the SM fermions. Employing
tree-level spontaneous R-symmetry breaking in the hidden sector and
extra(ordinary) gauge mediation, we obtain realistic supersymmetry breaking
soft mass terms with non-vanishing gaugino masses. Including the messenger
fields at the intermediate scale and Kaluza-Klein states at the
compactification scale, we study gauge coupling unification. We show that the
SO(10) unified gauge coupling is very strong and the unification scale can be
much higher than the compactification scale. We briefly discuss proton decay as
well.Comment: 25 pages, 1 fi
Nonequilibrium Dynamics in Noncommutative Spacetime

We study the effects of spacetime noncommutativity on the nonequilibrium
dynamics of particles in a thermal bath. We show that the noncommutative
thermal bath does not suffer from any further IR/UV mixing problem in the sense
that all the finite-temperature non-planar quantities are free from infrared
singularities. We also point out that the combined effect of finite temperature
and noncommutative geometry has a distinct effect on the nonequilibrium
dynamics of particles propagating in a thermal bath: depending on the momentum
of the mode of concern, noncommutative geometry may switch on or switch off
their decay and thermalization. This momentum dependent alternation of the
decay and thermalization rates could have significant impacts on the
nonequilibrium phenomena in the early universe at which spacetime
noncommutativity may be present. Our results suggest a re-examination of some
of the important processes in the early universe such as reheating after
inflation, baryogenesis and the freeze-out of superheavy dark matter
candidates.Comment: 24 pages, 2 figure
Mapping 6D N = 1 supergravities to F-theory

We develop a systematic framework for realizing general anomaly-free chiral
6D supergravity theories in F-theory. We focus on 6D (1, 0) models with one
tensor multiplet whose gauge group is a product of simple factors (modulo a
finite abelian group) with matter in arbitrary representations. Such theories
can be decomposed into blocks associated with the simple factors in the gauge
group; each block depends only on the group factor and the matter charged under
it. All 6D chiral supergravity models can be constructed by gluing such blocks
together in accordance with constraints from anomalies. Associating a geometric
structure to each block gives a dictionary for translating a supergravity model
into a set of topological data for an F-theory construction. We construct the
dictionary of F-theory divisors explicitly for some simple gauge group factors
and associated matter representations. Using these building blocks we analyze a
variety of models. We identify some 6D supergravity models which do not map to
integral F-theory divisors, possibly indicating quantum inconsistency of these
6D theories.Comment: 37 pages, no figures; v2: references added, minor typos corrected;
  v3: minor corrections to DOF counting in section
Direct Mediation and Metastable Supersymmetry Breaking for SO(10)

We examine a metastable $\mathcal{N}=1$ Macroscopic SO(N) SQCD model of
Intriligator, Seiberg and Shih (ISS). We introduce various baryon and meson
deformations, including multitrace operators and explore embedding an SO(10)
parent of the standard model into two weakly gauged flavour sectors. Direct
fundamental messengers and the symmetric pseudo-modulus messenger mediate SUSY
breaking to the MSSM. Gaugino and sfermion masses are computed and compared for
each deformation type. We also explore reducing the rank of the magnetic quark
matrix of the ISS model and find an additional fundamental messenger.Comment: 43 pages, Latex. Version to appear in JHEP
5D gravitational waves from complexified black rings

In this paper we construct and briefly study the 5D time-dependent solutions
of general relativity obtained via double analytic continuation of the black
hole (Myers-Perry) and of the black ring solutions with a double
(Pomeransky-Senkov) and a single rotation (Emparan-Reall). The new solutions
take the form of a generalized Einstein-Rosen cosmology representing
gravitational waves propagating in a closed universe. In this context the
rotation parameters of the rings can be interpreted as the extra wave
polarizations, while it is interesting to state that the waves obtained from
Myers-Perry Black holes exhibit an extra boost-rotational symmetry in higher
dimensions which signals their better behavior at null infinity. The analogue
to the C-energy is analyzed.Comment: 18 pages, 4 figures. References added, introduction and conclusions
  are amended, some issues related to singularity structure and symmetries are
  discussed. Matches the print version to appear in JHE
Spontaneous N=2 to N=1 Supersymmetry Breaking in Supergravity and Type
  II String Theory

Using the embedding tensor formalism we give the general conditions for the
existence of N=1 vacua in spontaneously broken N=2 supergravities. Our results
confirm the necessity of having both electrically and magnetically charged
multiplets in the spectrum, but also show that no further constraints on the
special Kahler geometry of the vector multiplets arise. The quaternionic field
space of the hypermultiplets must have two commuting isometries, and as an
example we discuss the special quaternionic-Kahler geometries which appear in
the low-energy limit of type II string theories. For these cases we find the
general solution for stable Minkowski and AdS N=1 vacua, and determine the
charges in terms of the holomorphic prepotentials. We find that the string
theory realisation of the N=1 Minkowski vacua requires the presence of
non-geometric fluxes, whereas they are not needed for the AdS vacua. We also
argue that our results should hold in the presence of spacetime and worldsheet
instanton corrections.Comment: 37 pages, v2: minor changes and references added, v3: published
  versio
General analysis of signals with two leptons and missing energy at the
  Large Hadron Collider

A signal of two leptons and missing energy is challenging to analyze at the
Large Hadron Collider (LHC) since it offers only few kinematical handles. This
signature generally arises from pair production of heavy charged particles
which each decay into a lepton and a weakly interacting stable particle. Here
this class of processes is analyzed with minimal model assumptions by
considering all possible combinations of spin 0, 1/2 or 1, and of weak
iso-singlets, -doublets or -triplets for the new particles. Adding to existing
work on mass and spin measurements, two new variables for spin determination
and an asymmetry for the determination of the couplings of the new particles
are introduced. It is shown that these observables allow one to independently
determine the spin and the couplings of the new particles, except for a few
cases that turn out to be indistinguishable at the LHC. These findings are
corroborated by results of an alternative analysis strategy based on an
automated likelihood test.Comment: 18 pages, 3 figures, LaTe
Quantum W-symmetry in AdS_3

It has recently been argued that, classically, massless higher spin theories
in AdS_3 have an enlarged W_N-symmetry as the algebra of asymptotic isometries.
In this note we provide evidence that this symmetry is realised
(perturbatively) in the quantum theory. We perform a one loop computation of
the fluctuations for a massless spin $s$ field around a thermal AdS_3
background. The resulting determinants are evaluated using the heat kernel
techniques of arXiv:0911.5085. The answer factorises holomorphically, and the
contributions from the various spin $s$ fields organise themselves into vacuum
characters of the W_N symmetry. For the case of the hs(1,1) theory consisting
of an infinite tower of massless higher spin particles, the resulting answer
can be simply expressed in terms of (two copies of) the MacMahon function.Comment: 23 pages; v2: References adde
Note on Bonus Relations for N=8 Supergravity Tree Amplitudes

We study the application of non-trivial relations between gravity tree
amplitudes, the bonus relations, to all tree-level amplitudes in N=8
supergravity. We show that the relations can be used to simplify explicit
formulae of supergravity tree amplitudes, by reducing the known form as a sum
of (n-2)! permutations obtained by solving on-shell recursion relations, to a
new form as a (n-3)!-permutation sum. We demonstrate the simplification by
explicit calculations of the next-to-maximally helicity violating (NMHV) and
next-to-next-to-maximally helicity violating (N^2MHV) amplitudes, and provide a
general pattern of bonus coefficients for all tree-level amplitudes.Comment: 21 pages, 9 figures; v2, minor changes, references adde
Extremal Three-point Correlators in Kerr/CFT

We compute three-point correlation functions in the near-extremal,
near-horizon region of a Kerr black hole, and compare to the corresponding
finite-temperature conformal field theory correlators. For simplicity, we focus
on scalar fields dual to operators ${\cal O}_h$ whose conformal dimensions obey
$h_3=h_1+h_2$, which we name \emph{extremal} in analogy with the classic $AdS_5
\times S^5$ three-point function in the literature. For such extremal
correlators we find perfect agreement with the conformal field theory side,
provided that the coupling of the cubic interaction contains a vanishing
prefactor $\propto h_3-h_1-h_2$. In fact, the bulk three-point function
integral for such extremal correlators diverges as $1/(h_3-h_1-h_2)$. This
behavior is analogous to what was found in the context of extremal AdS/CFT
three-point correlators. As in AdS/CFT our correlation function can
nevertheless be computed via analytic continuation from the non-extremal case.Comment: 22 pages; v2: references added, typos correcte
An Electron Fixed Target Experiment to Search for a New Vector Boson A'
  Decaying to e+e-

We describe an experiment to search for a new vector boson A' with weak
coupling alpha' > 6 x 10^{-8} alpha to electrons (alpha=e^2/4pi) in the mass
range 65 MeV < m_A' < 550 MeV. New vector bosons with such small couplings
arise naturally from a small kinetic mixing of the "dark photon" A' with the
photon -- one of the very few ways in which new forces can couple to the
Standard Model -- and have received considerable attention as an explanation of
various dark matter related anomalies. A' bosons are produced by radiation off
an electron beam, and could appear as narrow resonances with small production
cross-section in the trident e+e- spectrum. We summarize the experimental
approach described in a proposal submitted to Jefferson Laboratory's PAC35,
PR-10-009. This experiment, the A' Experiment (APEX), uses the electron beam of
the Continuous Electron Beam Accelerator Facility at Jefferson Laboratory
(CEBAF) at energies of ~1-4 GeV incident on 0.5-10% radiation length Tungsten
wire mesh targets, and measures the resulting e+e- pairs to search for the A'
using the High Resolution Spectrometer and the septum magnet in Hall A. With a
~1 month run, APEX will achieve very good sensitivity because the statistics of
e+e- pairs will be ~10,000 times larger in the explored mass range than any
previous search for the A' boson. These statistics and the excellent mass
resolution of the spectrometers allow sensitivity to alpha'/alpha one to three
orders of magnitude below current limits, in a region of parameter space of
great theoretical and phenomenological interest. Similar experiments could also
be performed at other facilities, such as the Mainz Microtron.Comment: 19 pages, 12 figures, 2 table
Probing Quantum Geometry at LHC

We present an evidence, that the volumes of compactified spaces as well as
the areas of black hole horizons must be quantized in Planck units. This
quantization has phenomenological consequences, most dramatic being for micro
black holes in the theories with TeV scale gravity that can be produced at LHC.
We predict that black holes come in form of a discrete tower with well defined
spacing. Instead of thermal evaporation, they decay through the sequence of
spontaneous particle emissions, with each transition reducing the horizon area
by strictly integer number of Planck units. Quantization of the horizons can be
a crucial missing link by which the notion of the minimal length in gravity
eliminates physical singularities. In case when the remnants of the black holes
with the minimal possible area and mass of order few TeV are stable, they might
be good candidates for the cold dark matter in the Universe.Comment: 14 pages, Late
Domain Wall Holography for Finite Temperature Scaling Solutions

We investigate a class of near-extremal solutions of Einstein-Maxwell-scalar
theory with electric charge and power law scaling, dual to charged IR phases of
relativistic field theories at low temperature. These are exact solutions of
theories with domain wall vacua; hence, we use nonconformal holography to
relate the bulk and boundary theories. We numerically construct a global
interpolating solution between the IR charged solutions and the UV domain wall
vacua for arbitrary physical choices of Lagrangian parameters. By passing to a
conformal frame in which the domain wall metric becomes that of AdS, we uncover
a generalized scale invariance of the IR scaling solution, indicating a
connection to the physics of Lifshitz fixed points. Finally, guided by
effective field theoretic principles and the physics of nonconformal D-branes,
we argue for the applicability of domain wall holography even in theories with
AdS critical points, namely those theories for which a scalar potential is
dominated by a single exponential term over a large range
Sum rules, plasma frequencies and Hall phenomenology in holographic
  plasmas

We study the AC optical and hall conductivities of Dp/Dq-branes intersections
in the probe approximation and use sum-rules to study various associated
transport coefficients. We determine that the presence of massive fundamental
matter, as compared to massless fundamental matter described holographically by
a theory with no dimensional defects, reduces the plasma frequency. We further
show that this is not the case when the brane intersections include defects. We
discuss in detail how to implement correctly the regularization of retarded
Green's functions so that the dispersion relations are satisfied and the low
energy behaviour of the system is physically realistic.Comment: 25 pages, 5 figures. v2.minor changes, published versio
Limit on the mass of a long-lived or stable gluino

We reinterpret the generic CDF charged massive particle limit to obtain a
limit on the mass of a stable or long-lived gluino. Various sources of
uncertainty are examined. The $R$-hadron spectrum and scattering cross sections
are modeled based on known low-energy hadron physics and the resultant
uncertainties are quantified and found to be small compared to uncertainties
from the scale dependence of the NLO pQCD production cross sections. The
largest uncertainty in the limit comes from the unknown squark mass: when the
squark -- gluino mass splitting is small, we obtain a gluino mass limit of 407
GeV, while in the limit of heavy squarks the gluino mass limit is 397 GeV. For
arbitrary (degenerate) squark masses, we obtain a lower limit of 322 GeV on the
gluino mass. These limits apply for any gluino lifetime longer than $\sim 30$
ns, and are the most stringent limits for such a long-lived or stable gluino.Comment: 15 pages, 5 figures, accepted for publication in JHE