pinecone/core-2020-05-10-deduplication huggingface dataset:
Hybrid conformal field theories

We describe a class of (2,2) superconformal field theories obtained by
fibering a Landau-Ginzburg orbifold CFT over a compact Kaehler base manifold.
While such models are naturally obtained as phases in a gauged linear sigma
model, our construction is independent of such an embedding. We discuss the
general properties of such theories and present a technique to study the
massless spectrum of the associated heterotic compactification. We test the
validity of our method by applying it to hybrid phases of linear models and
comparing spectra among the phases.Comment: 56 page
Characterizing New Physics with Polarized Beams at High-Energy Hadron
  Colliders

The TeV energy region is currently being explored by both the ATLAS and CMS
experiments of the Large Hadron Collider and phenomena beyond the Standard
Model are extensively searched for. Large fractions of the parameter space of
many models have already been excluded, and the ranges covered by the searches
will certainly be increased by the upcoming energy and luminosity upgrades. If
new physics has to be discovered in the forthcoming years, the ultimate goal of
the high-energy physics program will consist of fully characterizing the
newly-discovered degrees of freedom in terms of properties such as their
masses, spins and couplings. The scope of this paper is to show how the
availability of polarized beams at high-energy proton-proton colliders could
yield a unique discriminating power between different beyond the Standard Model
scenarios. We first discuss in a model-independent way how this discriminating
power arises from the differences between polarized and unpolarized parton
distribution functions. We then demonstrate how polarized beams allow one not
only to disentangle different production mechanisms giving the same final-state
signature, but also to obtain information on the parameters of the hypothetical
new physics sector of the theory. This is illustrated in the case of a
particular class of scenarios leading to monotop production. We consider three
specific models that could produce a monotop signature in unpolarized proton
collisions, and show how they could be distinguished by means of single- and
double-spin asymmetries in polarized collisions. Our results are presented for
both the Large Hadron Collider operating at a center-of-mass energy of 14 TeV
and a recently proposed Future Circular Collider assumed to collide protons at
a center-of-mass energy of 100 TeV.Comment: 23 pages, 12 figures, 1 table; version accepted by JHE
The universal Higgs fit

We perform a state-of-the-art global fit to all Higgs data. We synthesise them into a ‘universal’ form, which allows to easily test any desired model. We apply the proposed methodology to extract from data the Higgs branching ratios, production cross sections, couplings and to analyse composite Higgs models, models with extra Higgs doublets, supersymmetry, extra particles in the loops, anomalous top couplings, and invisible Higgs decays into Dark Matter. Best fit regions lie around the Standard Model predictions and are well approximated by our ‘universal’ fit. Latest data exclude the dilaton as an alternative to the Higgs, and disfavour fits with negative Yukawa couplings. We derive for the first time the SM Higgs boson mass from the measured rates, rather than from the peak positions, obtaining M h = 124 . 4 ± 1 . 6 GeV
Walls, Lines, and Spectral Dualities in 3d Gauge Theories

In this paper we analyze various half-BPS defects in a general three
dimensional N=2 supersymmetric gauge theory T. They correspond to closed paths
in SUSY parameter space and their tension is computed by evaluating period
integrals along these paths. In addition to such defects, we also study wall
defects that interpolate between T and its SL(2,Z) transform by coupling the 3d
theory to a 4d theory with S-duality wall. We propose a novel spectral duality
between 3d gauge theories and integrable systems. This duality complements a
similar duality discovered by Nekrasov and Shatashvili. As another application,
for 3d N=2 theories associated with knots and 3-manifolds we compute periods of
(super) A-polynomial curves and relate the results with the spectrum of domain
walls and line operators.Comment: 54 pages, 19 figures. v2: misprints corrected, clarifications and
  references adde
Box Graphs and Singular Fibers

We determine the higher codimension fibers of elliptically fibered Calabi-Yau
fourfolds with section by studying the three-dimensional N=2 supersymmetric
gauge theory with matter which describes the low energy effective theory of
M-theory compactified on the associated Weierstrass model, a singular model of
the fourfold. Each phase of the Coulomb branch of this theory corresponds to a
particular resolution of the Weierstrass model, and we show that these have a
concise description in terms of decorated box graphs based on the
representation graph of the matter multiplets, or alternatively by a class of
convex paths on said graph. Transitions between phases have a simple
interpretation as `flopping' of the path, and in the geometry correspond to
actual flop transitions. This description of the phases enables us to enumerate
and determine the entire network between them, with various matter
representations for all reductive Lie groups. Furthermore, we observe that each
network of phases carries the structure of a (quasi-)minuscule representation
of a specific Lie algebra. Interpreted from a geometric point of view, this
analysis determines the generators of the cone of effective curves as well as
the network of flop transitions between crepant resolutions of singular
elliptic Calabi-Yau fourfolds. From the box graphs we determine all fiber types
in codimensions two and three, and we find new, non-Kodaira, fiber types for
E_6, E_7 and E_8.Comment: 107 pages, 44 figures, v2: added case of E7 monodromy-reduced fiber
Information loss problem and a `black hole' model with a closed apparent
  horizon

In a classical description the spacetime curvature inside a black hole
infinitely grows. In the domain where it reaches the Planckian value and
exceeds it the Einstein equations should be modified. In the absence of
reliable theory of quantum gravity it is instructive to consider simplified
models. We assume that a spacetime curvature is limited by some value (of the
order of the Planckian one). We use modified Vaidya metric, proposed by
Hayward, to describe the black hole evaporation process. In such a spacetime
the curvature near $r=0$ remains finite, it does not have an event horizon and
its apparent horizon is closed. If the initial mass of such a `black hole' is
much larger than the Planckian one its properties (as seen by an external
observer) are practically the same as properties of the `standard' black hole
with the event horizon. We study outgoing null rays in the vicinity of the
outer apparent and introduce a notion of quasi-horizon. We demonstrate that
particles, trapped inside a `black hole' during the evaporation process,
finally may return to external space after the evaporation is completed. We
also demonstrate that such quanta would have very large blue-shift. The absence
of the event horizon makes it possible restoration of the unitarity in
evaporating black holes.Comment: 18 pages, 6 figures. New references added with their brief
  discussion. Conformal Carter-Penrose diagram is added. Found misprints are
  correcte
Non-Canonical Inflation in Supergravity

We investigate the effect of non-canonical kinetic terms on inflation in
supergravity. We find that the biggest impact of such higher-derivative kinetic
terms is due to the corrections to the potential that they induce via their
effect on the auxiliary fields, which now have a cubic equation of motion. This
is in contrast to the usual (non-supersymmetric) effective field theory
expansion which assumes that mass-suppressed higher-derivative terms do not
affect the lower-derivative terms already present. We demonstrate with several
examples that such changes in the potential can significantly modify the
inflationary dynamics. Our results have immediate implications for effective
descriptions of inflation derived from string theory, where higher-derivative
kinetic terms are generally present. In addition we elucidate the structure of
the theory in the parameter range where there are three real solutions to the
auxiliary field's equation of motion, studying the resulting three branches of
the theory, and finding that one of them suffers from a singularity in the
speed of propagation of fluctuations.Comment: 22 pages + Appendix, 16 figure
Electroweak precision measurements in supersymmetric models with a U(1)R
  lepton number

As experimental constraints on the parameter space of the MSSM and close
variations thereof become stronger, the motivation to explore supersymmetric
models that challenge some of the standard assumptions of the MSSM also become
stronger. For example, models where the gauginos are Dirac instead of Majorana
have recently received more attention. Beside allowing for a supersoft SUSY
breaking mechanism where the gauginos only provide finite threshold corrections
to scalar masses, the cross section for the production of a squark pairs is
reduced. In addition, Dirac gauginos can be used to build models that possess a
U(1)R symmetry. This symmetry can then be identified with a lepton number,
leading to models that are quite different from conventional scenarios. The
sneutrinos in these models can acquire a vev and give mass to the leptons and
the down-type squark. The phenomenology is novel, combining signatures that are
typical of R-parity violating scenarios with signatures arising from
leptoquarks. Correspondingly the constraints from electroweak precision data
are also different. In these models, one of the leptons mixes with gauginos and
superpotential Yukawa couplings can contribute to EWPM at tree level. In
addition, lepton universality is broken. In this paper we adapt the operators
analysis of Han and Skiba [1] to include the relevant violation of lepton
universality, and do a global fit of the model to electroweak precision data,
including all relevant tree-level and loop-level effects. We obtain bounds on
the vev of the sneutrino and on the superpotential couplings of the model.Comment: 18 pages, 6 figures, references adde
Comments on Renyi entropy in AdS$_3$/CFT$_2$

We extend and refine recent results on Renyi entropy in two-dimensional
conformal field theories at large central charge. To do so, we examine the
effects of higher spin symmetry and of allowing unequal left and right central
charges, at leading and subleading order in large total central charge. The
result is a straightforward generalization of previously derived formulae,
supported by both gravity and CFT arguments. The preceding statements pertain
to CFTs in the ground state, or on a circle at unequal left- and right-moving
temperatures. For the case of two short intervals in a CFT ground state, we
derive certain universal contributions to Renyi and entanglement entropy from
Virasoro primaries of arbitrary scaling weights, to leading and next-to-leading
order in the interval size; this result applies to any CFT. When these
primaries are higher spin currents, such terms are placed in one-to-one
correspondence with terms in the bulk 1-loop determinants for higher spin gauge
fields propagating on handlebody geometries.Comment: 41 pages. v3: various minor clarifications; added Subsection 4.3
  including a result on the entanglement limit; added ref
Boundary-to-bulk maps for AdS causal wedges and the Reeh-Schlieder
  property in holography

In order to better understand how AdS holography works for sub-regions, we
formulate a holographic version of the Reeh-Schlieder theorem for the simple
case of an AdS Klein-Gordon field. This theorem asserts that the set of states
constructed by acting on a suitable vacuum state with boundary observables
contained within any subset of the boundary is dense in the Hilbert space of
the bulk theory. To prove this theorem we need two ingredients which are
themselves of interest. First, we prove a purely bulk version of Reeh-Schlieder
theorem for an AdS Klein-Gordon field. This theorem relies on the analyticity
properties of certain vacuum states. Our second ingredient is a
boundary-to-bulk map for local observables on an AdS causal wedge. This mapping
is achieved by simple integral kernels which construct bulk observables from
convolutions with boundary operators. Our analysis improves on previous
constructions of AdS boundary-to-bulk maps in that it is formulated entirely in
Lorentz signature without the need for large analytic continuation of spatial
coordinates. Both our Reeh-Schlieder theorem and boundary-to-bulk maps may be
applied to globally well-defined states constructed from the usual AdS vacuum
as well more singular states such as the local vacuum of an AdS causal wedge
which is singular on the horizon.Comment: 30 pp., 4 color figure
Basin of attraction for turbulent thermalization and the range of
  validity of classical-statistical simulations

Different thermalization scenarios for systems with large fields have been
proposed in the literature based on classical-statistical lattice simulations
approximating the underlying quantum dynamics. We investigate the range of
validity of these simulations for condensate driven as well as fluctuation
dominated initial conditions for the example of a single component scalar field
theory. We show that they lead to the same phenomenon of turbulent
thermalization for the whole range of (weak) couplings where the
classical-statistical approach is valid. In the turbulent regime we establish
the existence of a dual cascade characterized by universal scaling exponents
and scaling functions. This complements previous investigations where only the
direct energy cascade has been studied for the single component theory. A
proposed alternative thermalization scenario for stronger couplings is shown to
be beyond the range of validity of classical-statistical simulations.Comment: 11 pages, 10 figures; version published in JHEP (minor revisions
A light SUSY dark matter after CDMS-II, LUX and LHC Higgs data

In SUSY, a light dark matter is usually accompanied by light scalars to
achieve the correct relic density, which opens new decay channels of the SM
like Higgs boson. Under current experimental constraints including the latest
LHC Higgs data and the dark matter relic density, we examine the status of a
light neutralino dark matter in the framework of NMSSM and confront it with the
direct detection results of CoGeNT, CDMS-II and LUX. We have the following
observations: (i) A dark matter as light as 8 GeV is still allowed and its
scattering cross section off the nucleon can be large enough to explain the
CoGeNT/CDMS-II favored region; (ii) The LUX data can exclude a sizable part of
the allowed parameter space, but still leaves a light dark matter viable; (iii)
The SM-like Higgs boson can decay into the light dark matter pair with an
invisible branching ratio reaching 30% under the current LHC Higgs data, which
may be tested at the 14 TeV LHC experiment.Comment: 18 pages, 4 figure
Holographic entanglement entropy in insulator/superconductor transition
  with Born-Infeld electrodynamics

We investigate the holographic entanglement entropy in the
insulator/superconductor phase transition for the Born-Infeld electrodynamics
with full backreaction in five-dimensional AdS soliton spacetime. We note that
the holographic entanglement entropy is a good probe to study the properties of
the phase transition, and the Born-Infeld factor $b$ has no effect on the
critical chemical potential $\mu_c$. We find that both in the half space and
the belt one, the non-monotonic behavior of the entanglement entropy versus the
chemical potential is a general property, and the entanglement entropy
increases with the increase of the Born-Infeld factor in the superconductor
phase. Particularly, there exists confinement/deconfinement phase transition in
the strip geometry and the critical width $\ell_c$ is dependent of the
Born-Infeld parameter.Comment: 17 pages, 6 figures, accepted for publication in JHEP. arXiv admin
  note: text overlap with arXiv:1203.6620 by other author
Self-Dual N=2 Born-Infeld Theory Through Auxiliary Superfields

There is an evidence that the N=2 Born-Infeld theory with spontaneously
broken N=4 supersymmetry exhibits self-duality. We perform a further check of
this hypothesis by constructing a new representation for the N=2 Born-Infeld
action through the auxiliary chiral superfield U. In such a formulation,
self-duality is equivalent to U(1) invariance of the U interaction. We
explicitly calculate the auxiliary interaction up to the 10th order and show
its U(1) duality invariance, thus proving that the original action is self-dual
to the same order. We also suggest a new method of recursive computation of the
N=2 Born-Infeld action in the standard formulation, based solely on the
nonlinear realization of the N=4 central charge on the N=2 superfield strengths
W, \bar W.Comment: 1 + 31 pages, substantial revision: an important Note and Appendix C
  added; section 2 corrected and expanded; some typos, eq. (5.13) and Appendix
  B correcte
Probing the Top-Yukawa Coupling in Associated Higgs production with a
  Single Top Quark

Associated production of the Higgs boson with a single top quark proceeds
through Feynman diagrams, which are either proportional to the hWW, top-Yukawa,
or the bottom-Yukawa couplings. It was shown in literature that the
interference between the top-Yukawa and the gauge-Higgs diagrams can be
significant, and thus the measurement of the cross sections can help pin down
the sign and the size of the top-Yukawa coupling. Here we perform a detailed
study with full detector simulations of such a possibility at the LHC-14 within
the current allowed range of hWW and top-Yukawa couplings, using h-> b b-bar,
\gamma\gamma, \tau+ \tau-, ZZ* -> 4 l modes. We found that the LHC-14 has the
potential to distinguish the size and the sign of the top-Yukawa coupling.
Among the channels the h-> b b-bar mode mode provides the best chance to probe
the signal, followed by the h -> \gamma\gamma\ mode, which has the advantage of
a narrow reconstructed mass peak. We also pointed out that the spatial
separation among the final-state particles has the potential in differentiating
among various values of the top-Yukawa coupling.Comment: 28 pages, 13 figures; a comment about NLO correction is added,
  references added; match the published versio
Multiple Scales in Pati-Salam Unification Models

We investigate models where gauge unification (GUT) proceeds in steps that
include Pati-Salam symmetry. Beyond the Standard Model, we allow for a
well-defined set of small representations of the GUT gauge group. We show that
all possible chains of Pati-Salam symmetry breaking can be realized in
accordance with gauge-coupling unification. We identify, in particular, models
with unification near the Planck scale, with intermediate left-right or SU(4)
quark-lepton symmetries that are relevant for flavor physics, with new colored
particles at accessible energies, and with an enlarged electroweak Higgs
sector. We look both at supersymmetric and non-supersymmetric scenarios.Comment: 48 pages, 11 figures, version accepted for publication in JHE
Constraining flavoured contact interactions at the LHC

Contact interactions are the low-energy footprints of New Physics, so
ideally, constraints upon them should be as generic and model independent as
possible. Hadron colliders search for four-quark contact interactions with
incident valence quarks, and the LHC currently sets limits on a flavour sum
(over uu,dd and ud) of selected interactions. We approximately translate these
bounds to a more complete (and larger) set of dimension-six interactions of
specified flavours. These estimates are obtained at the parton level, are
mostly analytic and are less restrictive than the experimental bounds on
flavour-summed interactions. The estimates may scale in a simple way to higher
energy and luminosity.Comment: 20 pages, 5 figure
Towards a classification of branes in theories with eight supercharges

We provide a classification of half-supersymmetric branes in quarter-maximal
supergravity theories with scalars parametrising coset manifolds. Guided by the
results previously obtained for the half-maximal theories, we are able to show
that half-supersymmetric branes correspond to the real longest weights of the
representations of the brane charges, where the reality properties of the
weights are determined from the Tits-Satake diagrams associated to the global
symmetry groups. We show that the resulting brane structure is universal for
all theories that can be uplifted to six dimensions. We also show that when
viewing these theories as low-energy theories for the suitably compactified
heterotic string, the classification we obtain is in perfect agreement with the
wrapping rules derived in previous works for the same theory compactified on
tori. Finally, we relate the branes to the R-symmetry representations of the
central charges and we show that in general the degeneracies of the BPS
conditions are twice those of the half-maximal theories and four times those of
the maximal ones.Comment: 47 pages, 8 figure
Angular analysis of charged and neutral $B \to K \mu^+\mu^-$ decays

The angular distributions of the rare decays $B^+ \to K^+\mu^+\mu^-$ and $B^0\to K^0_{\rm\scriptscriptstyle S}\mu^+\mu^-$ are studied with data corresponding to 3$~$fb$^{-1}$ of integrated luminosity, collected in proton-proton collisions at 7 and 8$~$TeV centre-of-mass energies with the LHCb detector. The angular distribution is described by two parameters, $F_{\rm H}$ and the forward-backward asymmetry of the dimuon system $A_{\rm FB}$, which are determined in bins of the dimuon mass squared. The parameter $F_{\rm H}$ is a measure of the contribution from (pseudo)scalar and tensor amplitudes to the decay width. The measurements of $A_{\rm FB}$ and $F_{\rm H}$ reported here are the most precise to date and are compatible with predictions from the Standard Model
Dark Energy from holographic theories with hyperscaling violation

We show that analytical continuation maps scalar solitonic solutions of
Einstein-scalar gravity, interpolating between an hyperscaling violating and an
Anti de Sitter (AdS) region, in flat FLRW cosmological solutions sourced by a
scalar field. We generate in this way exact FLRW solutions that can be used to
model cosmological evolution driven by dark energy (a quintessence field) and
usual matter. In absence of matter, the flow from the hyperscaling violating
regime to the conformal AdS fixed point in holographic models corresponds to
cosmological evolution from power-law expansion at early cosmic times to a de
Sitter (dS) stable fixed point at late times. In presence of matter, we have a
scaling regime at early times, followed by an intermediate regime in which dark
energy tracks matter. At late times the solution exits the scaling regime with
a sharp transition to a dS spacetime. The phase transition between hyperscaling
violation and conformal fixed point observed in holographic gravity has a
cosmological counterpart in the transition between a scaling era and a dS era
dominated by the energy of the vacuum.Comment: 18 pages, 4 figures. V2:Some typo errors and Eq. (3.12) corrected,
  three references adde
Two-loop planar master integrals for the production of off-shell vector bosons in hadron collisions

We describe the calculation of all planar master integrals that are needed for the computation of NNLO QCD corrections to the production of two off-shell vector bosons in hadron collisions. The most complicated representatives of integrals in this class are the two-loop four-point functions where two external lines are on the light-cone and two other external lines have different invariant masses. We compute these and other relevant integrals analytically using differential equations in external kinematic variables and express our results in terms of Goncharov polylogarithms. The case of two equal off-shellnesses, recently considered in ref. [1], appears as a particular case of our general solution