pinecone/core-2020-05-10-deduplication huggingface dataset:
One-Loop Superconformal and Yangian Symmetries of Scattering Amplitudes
  in N=4 Super Yang-Mills

Recently it has been argued that tree-level scattering amplitudes in N=4
Yang-Mills theory are uniquely determined by a careful study of their
superconformal and Yangian symmetries. However, at one-loop order these
symmetries are known to become anomalous due to infrared divergences. We
compute these one-loop anomalies for amplitudes defined through dimensional
regularisation by studying the tree-level symmetry transformations of the
unitarity branch cuts, keeping track of the crucial collinear terms arising
from the holomorphic anomaly. We extract the superconformal anomalies and show
that they may be cancelled through a universal one-loop deformation of the
tree-level symmetry generators which involves only tree-level data.
Specialising to the planar theory we also obtain the analogous deformation for
the level-one Yangian generator of momentum. Explicit checks of our one-loop
deformation are performed for MHV and the 6-point NMHV amplitudes.Comment: 64 pages, v2: typos and minor corrections in (6.14) and (6.17), to
  appear in JHE
Dark Matter Particle Spectroscopy at the LHC: Generalizing MT2 to
  Asymmetric Event Topologies

We consider SUSY-like missing energy events at hadron colliders and
critically examine the common assumption that the missing energy is the result
of two identical missing particles. In order to experimentally test this
hypothesis, we generalize the subsystem MT2 variable to the case of asymmetric
event topologies, where the two SUSY decay chains terminate in different
"children" particles. In this more general approach, the endpoint MT2max of the
MT2 distribution now gives the mass Mp(Mc(a),Mc(b)) of the parent particle as a
function of two input children masses Mc(a) and Mc(b). We propose two methods
for an independent determination of the individual children masses Mc(a) and
Mc(b). First, in the presence of upstream transverse momentum P(UTM) the
corresponding function Mp(Mc(a),Mc(b),P(UTM)) is independent of P(UTM) at
precisely the right values of the children masses. Second, the previously
discussed MT2 "kink" is now generalized to a "ridge" on the 2-dimensional
surface Mp(Mc(a),Mc(b)). As we show in several examples, quite often there is a
special point along that ridge which marks the true values of the children
masses. Our results allow collider experiments to probe a multi-component dark
matter sector directly and without any theoretical prejudice.Comment: 50 pages, 31 figures, includes a new Appendix, references added,
  typos correcte
Gauge invariant perturbation theory and non-critical string models of
  Yang-Mills theories

We carry out a gauge invariant analysis of certain perturbations of
$D-2$-branes solutions of low energy string theories. We get generically a
system of second order coupled differential equations, and show that only in
very particular cases it is possible to reduce it to just one differential
equation. Later, we apply it to a multi-parameter, generically singular family
of constant dilaton solutions of non-critical string theories in $D$
dimensions, a generalization of that recently found in arXiv:0709.0471[hep-th].
According to arguments coming from the holographic gauge theory-gravity
correspondence, and at least in some region of the parameters space, we obtain
glue-ball spectra of Yang-Mills theories in diverse dimensions, putting special
emphasis in the scalar metric perturbations not considered previously in the
literature in the non critical setup. We compare our numerical results to those
studied previously and to lattice results, finding qualitative and in some
cases, tuning properly the parameters, quantitative agreement. These results
seem to show some kind of universality of the models, as well as an irrelevance
of the singular character of the solutions. We also develop the analysis for
the T-dual, non trivial dilaton family of solutions, showing perfect agreement
between them.Comment: A new reference added
Calabi-Yau manifolds from pairs of non-compact Calabi-Yau manifolds

Most of Calabi-Yau manifolds that have been considered by physicists are
complete intersection Calabi-Yau manifolds of toric varieties or some quotients
of product types. Purpose of this paper is to introduce a different and rather
new kind of construction method of Calabi-Yau manifolds by pasting two
non-compact Calabi-Yau manifolds. We will also in some details explain a
curious and mysterious similarity with construction of some $G_2$-manifolds
(also called Joyce manifolds), which are base spaces for M-theory.Comment: 10 pages. Accepted for publication in JHE
Transport Coefficients from Extremal Gauss-Bonnet Black Holes

We calculate the shear viscosity of strongly coupled field theories dual to
Gauss-Bonnet gravity at zero temperature with nonzero chemical potential. We
find that the ratio of the shear viscosity over the entropy density is
$1/4\pi$, which is in accordance with the zero temperature limit of the ratio
at nonzero temperatures. We also calculate the DC conductivity for this system
at zero temperature and find that the real part of the DC conductivity vanishes
up to a delta function, which is similar to the result in Einstein gravity. We
show that at zero temperature, we can still have the conclusion that the shear
viscosity is fully determined by the effective coupling of transverse gravitons
in a kind of theories that the effective action of transverse gravitons can be
written into a form of minimally coupled scalars with a deformed effective
coupling.Comment: 23 pages, no figure; v2, refs added; v3, more refs added; v4, version
  to appear in JHE
Generalized N = 2 Super Landau Models

We generalize previous results for the superplane Landau model to exhibit an
explicit worldline N = 2 supersymmetry for an arbitrary magnetic field on any
two-dimensional manifold. Starting from an off-shell N = 2 superfield
formalism, we discuss the quantization procedure in the general case
characterized by two independent potentials on the manifold and show that the
relevant Hamiltonians are factorizable. In the restricted case when both the
Gauss curvature and the magnetic field are constant over the manifold and, as a
consequence, the underlying potentials are related, the Hamiltonians admit
infinite series of factorization chains implying the integrability of the
associated systems. We explicitly determine the spectrum and eigenvectors for
the particular model with CP^1 as the bosonic manifold.Comment: 26 page
A general class of holographic superconductors.

We introduce a simple generalization of the basic holographic superconductor model in which the spontaneous breaking of a global U(1) symmetry occurs via the Stückelberg mechanism. This more general setting allows tuning features such as the order of the transition. The physical vacuum of the condensed phase and the order of the transition are determined by a detailed analysis of the free energy of the system. For first order transitions, we identify a metastable phase above the critical temperature. In this case, the conductivity shows additional poles, thus suggesting that the condensate has internal structure
A boundary stress tensor for higher-derivative gravity in AdS and
  Lifshitz backgrounds

We investigate the Brown-York stress tensor for curvature-squared theories.
This requires a generalized Gibbons-Hawking term in order to establish a
well-posed variational principle, which is achieved in a universal way by
reducing the number of derivatives through the introduction of an auxiliary
tensor field. We examine the boundary stress tensor thus defined for the
special case of `massive gravity' in three dimensions, which augments the
Einstein-Hilbert term by a particular curvature-squared term. It is shown that
one obtains finite results for physical parameters on AdS upon adding a
`boundary cosmological constant' as a counterterm, which vanishes at the
so-called chiral point. We derive known and new results, like the value of the
central charges or the mass of black hole solutions, thereby confirming our
prescription for the computation of the stress tensor. Finally, we inspect
recently constructed Lifshitz vacua and a new black hole solution that is
asymptotically Lifshitz, and we propose a novel and covariant counterterm for
this case.Comment: 25 pages, 1 figure; v2: minor corrections, references added, to
  appear in JHE
Compact F-theory GUTs with U(1)_PQ

We construct semi-local and global realizations of SU(5) GUTs in F-theory
that utilize a U(1)_PQ symmetry to protect against dimension four proton decay.
Symmetries of this type, which assign charges to H_u and H_d that forbid a tree
level \mu term, play an important role in scenarios for neutrino physics and
gauge mediation that have been proposed in local F-theory model building. As
demonstrated in arXiv:0906.4672, the presence of such a symmetry implies the
existence of non-GUT exotics in the spectrum, when hypercharge flux is used to
break the GUT group and to give rise to doublet-triplet splitting. These
exotics are of precisely the right type to solve the unification problem in
such F-theory models and might also comprise a non-standard messenger sector
for gauge mediation. We present a detailed description of models with U(1)_PQ
in the semi-local regime, which does not depend on details of any specific
Calabi-Yau four-fold, and then specialize to the geometry of arXiv:0904.3932 to
construct three-generation examples with the minimal allowed number of non-GUT
exotics. Among these, we find a handful of models in which the D3-tadpole
constraint can be satisfied without requiring the introduction of
anti-D3-branes. Finally, because SU(5) singlets that carry U(1)_PQ charge may
serve as candidate right-handed neutrinos or can be used to lift the exotics,
we study their origin in compact models and motivate a conjecture for how to
count their zero modes in a semi-local setting.Comment: 73 pages, 5 figures, v2: minor corrections to 4.3 and 6.3.1,
  reference adde
NLO Polarized Chargino pair Production in Electron Positron Annihilation

We calculate the complete one-loop quantum corrections to the helicity
eigenstate chargino pair production cross sections in polarized electron
positron collisions, within the Minimal Supersymmetric Standard Model. We
calculate the non-QED corrections using the helicity amplitudes formalism, and
Dimensional Regularization to deal with ultraviolet divergences. We calculate
QED corrections using the dipole subtraction formalism to extract soft and
collinear divergences in Bremsstrahlung, canceling them with the infrared
divergences from virtual QED corrections. We show numerical results for the
Focus Point scenario in mSUGRA, where we find important quantum corrections for
differential cross sections with definite chargino helicities.Comment: 25 pages, 13 figure
Modulus stabilization and IR-brane kinetic terms in gauge-Higgs
  unification

We discuss the modulus stabilization by the Casimir energy and various
effects of IR-brane kinetic terms for the gauge fields in a gauge-Higgs
unification model in the warped spacetime, where the Wilson line phase
$\theta_H$ is determined as $\theta_H=\pi/2$. We find that the brane kinetic
terms with O(1) coefficients are necessary for the modulus stabilization. On
the other hand, large brane kinetic terms can deviate 4D gauge couplings from
the standard model values and also cause too light Kaluza-Klein (KK) modes. In
the parameter region that ensures the modulus stabilization, the KK gluon
appears below 1 TeV, which marginally satisfies the experimental bound. The
allowed parameter region will be enlarged in a model where a smaller value of
$\theta_H$ is realized.Comment: 20 pages, 5 figures, typos correcte
Entanglement Entropy in Non-Relativistic Field Theories

We calculate entanglement entropy in a non-relativistic field theory
described by the Schr\"odinger operator. We demonstrate that the entropy is
characterized by i) the area law and ii) UV divergences that are identical to
those in the relativistic field theory. These observations are further
supported by a holographic consideration. We use the non-relativistic symmetry
and completely specify entanglement entropy in large class of non-relativistic
theories described by the field operators polynomial in derivatives. We suggest
that the area law of the entropy can be tested in experiments with condensed
matter systems such as liquid helium.Comment: 4 pages; v2: discussion of interacting fields include
Universal time-dependent deformations of Schrodinger geometry

We investigate universal time-dependent exact deformations of Schrodinger
geometry. We present 1) scale invariant but non-conformal deformation, 2)
non-conformal but scale invariant deformation, and 3) both scale and conformal
invariant deformation. All these solutions are universal in the sense that we
could embed them in any supergravity constructions of the Schrodinger invariant
geometry. We give a field theory interpretation of our time-dependent
solutions. In particular, we argue that any time-dependent chemical potential
can be treated exactly in our gravity dual approach.Comment: 24 pages, v2: references adde
Bounds on Black Hole Entropy in Unitary Theories of Gravity

We consider unitary and weakly coupled theories of gravity that extend
Einstein gravity and reduce to it asymptotically at large distances. Our
discussion is restricted to such theories that, similarly to Einstein gravity,
contain black holes as semiclassical states in a range of scales. We show that,
at a given scale, the entropy of these black holes has to be larger than the
number of elementary light species in the theory. Our bound follows from the
observation that the black hole entropy has to be larger than the product of
its mass and horizon radius (in units of Planck's constant divided by the speed
of light) and the fact that, for any semiclassical black hole, this product has
to be larger than the number of light species. For theories that obey our
assumptions, the bound resolves the "species problem": the tension between the
geometric, species-independent nature of black hole entropy and the
proportionality of ordinary thermodynamic entropy to the number of species. We
then show that, when black holes in Einstein's theory are compared to those in
the extended theories at a fixed value of mass, the entropy of the Einstein
black holes will always be minimal. Similar considerations are also applied to
the entropy density of black branes in anti-de Sitter space.Comment: 16 pages, no figure
Relating U(N)xU(N) to SU(N)xSU(N) Chern-Simons Membrane theories

By integrating out the U(1)_B gauge field, we show that the U(n)xU(n) ABJM
theory at level k is equivalent to a Z_k identification of the
(SU(n)xSU(n))/Z_n Chern-Simons theory, but only when n and k are coprime. As a
consequence, the k=1 ABJM model for two M2-branes in R^8 can be identified with
the N=8 (SU(2)xSU(2))/Z_2 theory. We also conjecture that the U(2)xU(2) ABJM
model at k=2 is equivalent to the N=8 SU(2)xSU(2)-theory.Comment: 16 pages, Latex; v2: references added; v3: Clarifications adde
Field Representations of Vector Supersymmetry

We study some field representations of vector supersymmetry with superspin
Y=0 and Y=1/2 and nonvanishing central charges. For Y=0, we present two
multiplets composed of four spinor fields, two even and two odd, and we provide
a free action for them. The main differences between these two multiplets are
the way the central charge operators act and the compatibility with the
Majorana reality condition on the spinors. One of the two is related to a
previously studied spinning particle model. For Y=1/2, we present a multiplet
composed of one even scalar, one odd vector and one even selfdual two-form,
which is a truncation of a known representation of the tensor supersymmetry
algebra in Euclidean spacetime. We discuss its rotation to Minkowski spacetime
and provide a set of dynamical equations for it, which are however not derived
from a Lagrangian. We develop a superspace formalism for vector supersymmetry
with central charges and we derive our multiplets by superspace techniques.
Finally, we discuss some representations with vanishing central charges.Comment: 37 page
Energy-Spin Trajectories in AdS_5 x S^5 from Semiclassical Vertex
  Operators

We study the relation between vertex operators in AdS_5 x S^5 and classical
spinning string solutions. In the limit of large quantum numbers the treatment
of vertex operators becomes semiclassical. In this regime, a given vertex
operator carrying a certain set of quantum numbers defines a singular solution.
We show in a number of examples that this solution coincides with the classical
string solution with the same quantum numbers but written in a different
two-dimensional coordinate system. The marginality condition imposed on an
operator yields a relation between the energy and the other quantum numbers
which is shown to coincide with that of the corresponding classical string
solution. We also argue that in some cases vertex operators in AdS_5 x S^5
cannot be given by expressions similar to the ones in flat space and a more
involved consideration is required.Comment: 23 pages, 1 Figur
SUSY parameter determination at the LHC using cross sections and
  kinematic edges

We study the determination of supersymmetric parameters at the LHC from a
global fit including cross sections and edges of kinematic distributions. For
illustration, we focus on a minimal supergravity scenario and discuss how well
it can be constrained at the LHC operating at 7 and 14 TeV collision energy,
respectively. We find that the inclusion of cross sections greatly improves the
accuracy of the SUSY parameter determination, and allows to reliably extract
model parameters even in the initial phase of LHC data taking with 7 TeV
collision energy and 1/fb integrated luminosity. Moreover, cross section
information may be essential to study more general scenarios, such as those
with non-universal gaugino masses, and distinguish them from minimal,
universal, models.Comment: 22 pages, 8 figure
Parameter Degeneracy in Neutrino Oscillation -- Solution Network and
  Structural Overview --

It is known that there is a phenomenon called "parameter degeneracy" in
neutrino oscillation measurement of lepton mixing parameters; A set of the
oscillation probabilities, e.g., P(nu_mu --> nu_e) and its CP-conjugate
P(bar{nu}_mu --> bar{nu}_e) at a particular neutrino energy does not determine
uniquely the values of theta_13 and delta. With use of the approximate form of
the oscillation probability 'a la Cervera et al., a complete analysis of the
eightfold parameter degeneracy is presented. We propose a unified view of the
various types of the degeneracy as invariance of the oscillation probabilities
under discrete mappings of the mixing parameters. Explicit form of the mapping
is obtained either by symmetry argument, or by deriving exact analytic
expressions of all the degeneracy solutions for a given true solution. Due to
the one-to-one mapping structure the degeneracy solutions are shown to form a
network. We extend our analysis into the parameter degeneracy in T- and
CPT-conjugate measurement as well as to the setup with the golden and the
silver channels, P(nu_e --> nu_mu) and P(nu_e --> nu_tau). Some characteristic
features of the degeneracy solutions in CP-conjugate measurement, in particular
their energy dependences, are illuminated by utilizing the explicit analytic
solutions.Comment: 52 pages, 24 figures. The reference 86 corrected. Matches to the
  published versio
One-point functions in massive integrable QFT with boundaries

We consider the expectation value of a local operator on a strip with
non-trivial boundaries in 1+1 dimensional massive integrable QFT. Using finite
volume regularisation in the crossed channel and extending the boundary state
formalism to the finite volume case we give a series expansion for the
one-point function in terms of the exact form factors of the theory. The
truncated series is compared with the numerical results of the truncated
conformal space approach in the scaling Lee-Yang model. We discuss the
relevance of our results to quantum quench problems.Comment: 43 pages, 20 figures, v2: typos correcte
On Exact Symmetries and Massless Vectors in Holographic Flows and other
  Flux Vacua

We analyze the isometries of Type IIB flux vacua based on the
Papadopolous-Tseytlin ansatz and identify the related massless bulk vector
fields. To this end we devise a general ansatz, valid in any flux
compactification, for the fluctuations of the metric and p-forms that
diagonalizes the coupled equations. We then illustrate the procedure in the
simple case of holographic flows driven by the RR 3-form flux only.
Specifically we study the fate of the isometries of the Maldacena-Nunez
solution associated to wrapped D5-branes.Comment: 23 page
Branes and massive IIA duals of 3d CFT's

We describe brane configurations that interpolate between the N=6 AdS4xCP3
background of Type IIA supergravity and the N=0 AdS4xCP3 background of massive
Type IIA supergravity. Using the T-dual Type IIB configurations we prove that
this leads to unequal Chern-Simons levels in the dual gauge theory, and find
the precise relation between the parameters of the gauge theory and the RR
fluxes of the background. This provides further evidence for the conjecture of
Gaiotto and Tomasiello about the CFT dual of the massive Type IIA background.Comment: 20 pages, 12 figure
Supersymmetric Wilson loops in N=4 SYM and pure spinors

We study supersymmetric Wilson loop operators in four-dimensional N=4 super
Yang-Mills theory. We show that the contour of a supersymmetric Wilson loop is
either an orbit of some conformal transformation of the space-time (case I), or
an arbitrary contour in the subspace where local superalgebra generator is a
pure spinor (case II). In the more interesting case II we find and classify all
pairs (Q,W) of the supercharges and the corresponding operators modulo the
action of the global symmetry group.Comment: 46 page
Lepton Jets in (Supersymmetric) Electroweak Processes

We consider some of the recent proposals in which weak-scale dark matter is
accompanied by a GeV scale dark sector that could produce spectacular
lepton-rich events at the LHC. Since much of the collider phenomenology is only
weakly model dependent it is possible to arrive at generic predictions for the
discovery potential of future experimental searches. We concentrate on the
production of dark states through $Z^0$ bosons and electroweak-inos at the
Tevatron or LHC, which are the cleanest channels for probing the dark sector.
We properly take into account the effects of dark radiation and dark cascades
on the formation of lepton jets. Finally, we present a concrete definition of a
lepton jet and suggest several approaches for inclusive experimental searches.Comment: 23 pages, 13 figures, published version, added section 3.3 expanding
  on lepton jet's morpholog
AdS$_3$ vacua and RG flows in three dimensional gauged supergravities

We study $AdS_3$ supersymmetric vacua in N=4 and N=8, three dimensional
gauged supergravities, with scalar manifolds $(\frac{SO(4,4)}{SO(4)\times
SO(4)})^2$ and $\frac{SO(8,8)}{SO(8)\times SO(8)}$, non-semisimple Chern-Simons
gaugings $SO(4)\ltimes {\bf R}^6$ and $(SO(4)\ltimes {\bf R}^6)^2$,
respectively. These are in turn equivalent to SO(4) and $SO(4)\times SO(4)$
Yang-Mills theories coupled to supergravity. For the N=4 case, we study
renormalization group flows between UV and IR $AdS_3$ vacua with the same
amount of supersymmetry: in one case, with (3,1) supersymmetry, we can find an
analytic solution whereas in another, with (2,0) supersymmetry, we give a
numerical solution. In both cases, the flows turn out to be v.e.v. flows, i.e.
they are driven by the expectation value of a relevant operator in the dual
$SCFT_2$. These provide examples of v.e.v. flows between two $AdS_3$ vacua
within a gauged supergravity framework.Comment: 35 pages in JHEP form, 3 figures, typos corrected, references adde