pinecone/core-2020-05-10-deduplication huggingface dataset:
Revisiting superparticle spectra in superconformal flavor models

We study superparticle spectra in the superconformal flavor scenario with
non-universal gaugino masses. The non-universality of gaugino masses can lead
to the wino-like or higgsino-like neutralino LSP. Furthermore, it is shown that
the parameter space for the higgsino-like LSP includes the region where the
fine-tuning problem can be improved. The degeneracy of soft scalar masses
squared does not drastically change by taking ratios of gaugino masses of order
one. The degeneracy of scalar masses for squarks and left-handed sleptons would
be good to avoid the FCNC problem but that of right-handed slepton masses is
weak. However, the overall size of right-handed slepton masses become larger
when the bino becomes heavier. It is also pointed out that such region can be
realized, and thus, that would be favorable to avoid the FCNC problem for soft
scalar masses as well as A-terms.Comment: 18 pages, 12 figures, reference added, minor correction
Chaos in the Gauge/Gravity Correspondence

We study the motion of a string in the background of the Schwarzschild black
hole in AdS_5 by applying the standard arsenal of dynamical systems. Our
description of the phase space includes: the power spectrum, the largest
Lyapunov exponent, Poincare sections and basins of attractions. We find
convincing evidence that the motion is chaotic. We discuss the implications of
some of the quantities associated with chaotic systems for aspects of the
gauge/gravity correspondence. In particular, we suggest some potential
relevance for the information loss paradox.Comment: 29 pages, 11 figure
Wilson Loops in N=2 Superconformal Yang-Mills Theory

We present a three-loop O(g^6) calculation of the difference between the
expectation values of Wilson loops evaluated in N=4 and superconformal N=2
supersymmetric Yang-Mills theory with gauge group SU(N) using dimensional
reduction. We find a massive reduction of required Feynman diagrams, leaving
only certain two-matter-loop corrections to the gauge field and associated
scalar propagator. This "diagrammatic difference" leaves a finite result
proportional to the bare propagators and allows the recovery of the zeta(3)
term coming from the matrix model for the 1/2 BPS circular Wilson loop in the
N=2 theory. The result is valid also for closed Wilson loops of general shape.
Comments are made concerning light-like polygons and supersymmetric loops in
the plane and on S^2.Comment: 16 pages. v2 minor changes, to appear in JHEP. v3 corrected
  reference
Neutrino Mixing Angles in Sequential Dominance to NLO and NNLO

Neutrinos with hierarchical masses and two large mixing angles may naturally
originate from sequential dominance (SD). Within this framework we present
analytic expressions for the neutrino mixing angles including the
next-to-leading order (NLO) and next-to-next-to-leading order (NNLO)
corrections arising from the second lightest and lightest neutrino masses. The
analytic results for neutrino mixing angles in SD presented here, including the
NLO and NNLO corrections, are applicable to a wide class of models and may
provide useful insights when confronting the models with data from high
precision neutrino experiments. We also point out that for special cases of SD
corresponding to form dominance (FD) the NLO and NNLO corrections both vanish.
For example we study tri-bimaximal (TB) mixing via constrained sequential
dominance (CSD) which involves only a NNLO correction and tri-bimaximal-reactor
(TBR) mixing via partially constrained sequential dominance (PCSD) which
involves a NLO correction suppressed by the small reactor angle and show that
the analytic results have good agreement with the numerical results for these
cases.Comment: 27 pages, 2 figures, version to appear in JHE
Renormalization-Group Improved Predictions for Top-Quark Pair Production
  at Hadron Colliders

Precision predictions for phenomenologically interesting observables such as
the t-tbar invariant mass distribution and forward-backward asymmetry in
top-quark pair production at hadron colliders require control over the
differential cross section in perturbative QCD. In this paper we improve
existing calculations of the doubly differential cross section in the invariant
mass and scattering angle by using techniques from soft-collinear effective
theory to perform an NNLL resummation of threshold logarithms, which become
large when the invariant mass M of the top-quark pair approaches the partonic
center-of-mass energy. We also derive an approximate formula for the
differential cross section at NNLO in fixed-order perturbation theory, which
completely determines the coefficients multiplying the singular plus
distributions. We then match our results in the threshold region with the exact
results at NLO in fixed-order perturbation theory, and perform a numerical
analysis of the invariant mass distribution, the total cross section, and the
forward-backward asymmetry. We argue that these are the most accurate
predictions available for these observables at present. Using MSTW2008NNLO
parton distribution functions (PDFs) along with \alpha_s(M_Z)=0.117 and
m_t=173.1 GeV, we obtain for the inclusive production cross sections at the
Tevatron and LHC the values \sigma_{Tevatron} = (6.30 +-0.19 +0.31-0.23) pb and
\sigma_{LHC} = (149 +- 7 +- 8) pb, where the first error results from scale
variations while the second reflects PDF uncertainties.Comment: 61 pages, 18 figures, version to appear in JHE
More Holography from Conformal Field Theory

We extend the work of [4] to support the conjecture that any conformal field
theory with a large N expansion and a large gap in the spectrum of anomalous
dimensions has a local bulk dual. We count to O(1/N^2) the solutions to the
crossing constraints in conformal field theory for a completely general scalar
four-point function and show that, to this order, the counting matches the
number of independent interactions in a general scalar theory on Anti-de Sitter
space. We introduce parity odd conformal blocks for this purpose.Comment: 19 page
Covariantly constant forms on torsionful geometries from world-sheet and
  spacetime perspectives

The symmetries of two-dimensional supersymmetric sigma models on target
spaces with covariantly constant forms associated to special holonomy groups
are analysed. It is shown that each pair of such forms gives rise to a new one,
called a Nijenhuis form, and that there may be further reductions of the
structure group. In many cases of interest there are also covariantly constant
one-forms which also give rise to symmetries. These geometries are of interest
in the context of heterotic supergravity solutions and the associated
reductions are studied from a spacetime point of view via the Killing spinor
equations.Comment: 33 pages, minor modifications, version published in JHE
Charged particle-like branes in ABJM

We study the effect of adding lower dimensional brane charges to the 't Hooft
monopole, di-baryon and baryon vertex configurations in $AdS_4 \times
\mathbb{P}^3$. We show that these configurations capture the background fluxes
in a way that depends on the induced charges, and therefore, require additional
fundamental strings in order to cancel the worldvolume tadpoles. The study of
the dynamics reveals that the charges must lie inside some interval in order to
find well defined configurations, a situation familiar from the baryon vertex
in $AdS_5 \times S^5$ with charges. For the baryon vertex and the di-baryon the
number of fundamental strings must also lie inside an allowed interval. Our
configurations are sensitive to the flat $B$-field recently suggested in the
literature. We make some comments on its possible role. We also discuss how
these configurations are modified in the presence of a non-zero Romans mass.Comment: 31 pages, 14 figures, discussion of charges improved, published
  versio
Heavy Ion Collisions with Transverse Dynamics from Evolving AdS
  Geometries

Currently there exists no known way to construct the Stress-Energy Tensor
$(T_{\mu \nu})$ of the produced medium in heavy ion collisions at strong
coupling from purely theoretical grounds. In this paper, some steps are taken
in that direction. In particular, the evolution of $T_{\mu \nu}$ at strong
coupling and at high energies is being studied for early proper times $(\tau)$.
This is achieved in the context of the AdS/CFT duality by constructing the
evolution of the dual geometry in an AdS$_5$ background. Improving the earlier
works in the literature, the two incident nuclei have an impact parameter $b$
and a non-trivial transverse profile. The nuclear matter is modeled by two
shock waves corresponding to a non-zero five dimensional bulk Stress-Energy
Tensor $J_{MN}$. An analytic formula for $T_{\mu \nu}$ at small $\tau$ is
derived and is used in order to calculate the momentum anisotropy and spatial
eccentricity of the medium produced in the collision as a function of the ratio
$\frac{\tau}{b}$. The result for eccentricity at intermediate $\frac{\tau}{b}$
agrees qualitatively with the results obtained in the context of perturbation
theory and by using hydrodynamic simulations. Finally, the problem of the
negative energy density and its natural connection to the eikonal approximation
is discussed.Comment: 60 pages, 7 figure
Lepton Flavour Violation in the Presence of a Fourth Generation of
  Quarks and Leptons

We calculate the rates for the charged lepton flavour violating (LFV) decays
l_i -> l_j gamma, tau -> l pi, tau -> l eta('), mu^- -> e^-e^+e^-, the six
three-body leptonic decays tau^- -> l_i^- l_j^+ l_k^- and the rate for mu-e
conversion in nuclei in the Standard Model (SM3) extended by a fourth
generation of quarks and leptons (SM4), assuming that neutrinos are Dirac
particles. We also calculate branching ratios for K_L -> mu e, K_L -> pi^0 mu
e, B_{d,s} -> mu e, B_{d,s} -> tau e and B_{d,s} -> tau mu. We find that the
pattern of the LFV branching ratios in the SM4 differs significantly from the
one encountered in the MSSM, allowing to distinguish these two models with the
help of LFV processes in a transparent manner. Also differences with respect to
the Littlest Higgs model with T-parity are found. Most importantly the
branching ratios for l_i -> l_j gamma, tau -> l pi, tau -> l eta('), mu^- ->
e^-e^+e^-, tau^- -> e^-e^+e^-, tau^- -> mu^- mu^+ mu^-, tau^- -> e^- mu^+ mu^-
and tau^- -> mu^- e^+ e^- can all still be as large as the present experimental
upper bounds but not necessarily simultaneously. Also the rate for mu-e
conversion in nuclei can reach the corresponding upper bound.Comment: 28 pages, 9 figures, v3: References added, Version to be published in
  JHE
Visible Effects of Invisible Hidden Valley Radiation

Assuming there is a new gauge group in a Hidden Valley, and a new type of
radiation, can we observe it through its effect on the kinematic distributions
of recoiling visible particles? Specifically, what are the collider signatures
of radiation in a hidden sector? We address these questions using a generic
SU(N)-like Hidden Valley model that we implement in Pythia. We find that in
both the e+e- and the LHC cases the kinematic distributions of the visible
particles can be significantly affected by the valley radiation. Without a
proper understanding of such effects, inferred masses of "communicators" and of
invisible particles can be substantially off.Comment: 31 pages, 28 figures removed figure titles,updated 2
  references,corrected typo
Patterns of Flavour Violation in the Presence of a Fourth Generation of
  Quarks and Leptons

We calculate a number of observables related to particle-antiparticle mixing
and the branching ratios for the most interesting rare and CP-violating K and B
decays in the Standard Model (SM3) extended by a fourth generation of quarks
and leptons (SM4). A model-independent parameterisation of these observables in
terms of gauge-independent functions is adopted, which is useful for studying
the breaking of the universality between K, Bd and Bs systems through
non-minimal flavour violating interactions. We calculate first the mass
differences Delta M_i in the neutral K and B system, the mixing-induced CP
asymmetries S_{psi K_S}, S_{psi phi}, S_{phi K_S}, S_{eta' K_S} and epsilon_K.
Subsequently, a detailed analysis of K^+ -> pi^+ nu nu, K_L -> pi^0 nu nu,
B_{s,d} -> mu^+ mu^-, B -> X_{s,d} nu nu, K_L -> pi^0 l^+ l^-, B -> X_s gamma
and B -> X_{s,d} l^+ l^- is presented, and also epsilon'/epsilon is considered.
For some of these observables the departures from SM3 predictions can still be
spectacular.
  We discuss how the new mixing parameters (3 angles, 2 CP phases) can be
determined using the flavour observables in question. We identify the different
hierarchical structures in the SM4 flavour mixing matrix, allowed by
phenomenological and theoretical constraints, and define the corresponding
generalised Wolfenstein expansion. Most importantly, we show how the
characteristic patterns of correlations among the considered flavour
observables allow to distinguish this New Physics scenario from supersymmetric
flavour models, the Littlest Higgs model with T-parity and the Randall-Sundrum
model with custodial protection.Comment: Heavily revised version, added lots of comments, improved
  presentation, matches published versio
The Bajnok-Janik formula and wrapping corrections

We write down the simplified TBA equations of the $AdS_5 \times S^5$ string
sigma-model for minimal energy twist-two operators in the sl(2) sector of the
model. By using the linearized version of these TBA equations it is shown that
the wrapping corrected Bethe equations for these states are identical, up to
O(g^8), to the Bethe equations calculated in the generalized L\"uscher approach
(Bajnok-Janik formula). Applications of the Bajnok-Janik formula to
relativistic integrable models, the nonlinear O(n) sigma models for n=2,3,4 and
the SU(n) principal sigma models, are also discussed.Comment: Latex, 22 pages, published versio
Universality of the topological susceptibility in the SU(3) gauge theory

The definition and computation of the topological susceptibility in
non-abelian gauge theories is complicated by the presence of non-integrable
short-distance singularities. Recently, alternative representations of the
susceptibility were discovered, which are singularity-free and do not require
renormalization. Such an expression is here studied quantitatively, using the
lattice formulation of the SU(3) gauge theory and numerical simulations. The
results confirm the expected scaling of the susceptibility with respect to the
lattice spacing and they also agree, within errors, with computations of the
susceptibility based on the use of a chiral lattice Dirac operator.Comment: Plain TeX source, 14 pages, 1 figure; v3: further typos corrected,
  version published in JHE
Neutrino Mass, Sneutrino Dark Matter and Signals of Lepton Flavor
  Violation in the MRSSM

We study the phenomenology of mixed-sneutrino dark matter in the Minimal
R-Symmetric Supersymmetric Standard Model (MRSSM). Mixed sneutrinos fit
naturally within the MRSSM, as the smallness (or absence) of neutrino Yukawa
couplings singles out sneutrino A-terms as the only ones not automatically
forbidden by R-symmetry. We perform a study of randomly generated sneutrino
mass matrices and find that (i) the measured value of $\Omega_{DM}$ is well
within the range of typical values obtained for the relic abundance of the
lightest sneutrino, (ii) with small lepton-number-violating mass terms
$m_{nn}^{2} {\tilde n} {\tilde n}$ for the right-handed sneutrinos, random
matrices satisfying the $\Omega_{DM}$ constraint have a decent probability of
satisfying direct detection constraints, and much of the remaining parameter
space will be probed by upcoming experiments, (iii) the $m_{nn}^{2} {\tilde n}
{\tilde n}$ terms radiatively generate appropriately small Majorana neutrino
masses, with neutrino oscillation data favoring a mostly sterile lightest
sneutrino with a dominantly mu/tau-flavored active component, and (iv) a
sneutrino LSP with a significant mu component can lead to striking signals of
e-mu flavor violation in dilepton invariant-mass distributions at the LHC.Comment: Revised collider analysis in Sec. 5 after fixing error in particle
  spectrum, References adde
Instability by Chern-Simons and/or Transgressions

It was demonstrated recently that there is an upper bound of the Chern-Simons
coupling of the five-dimensional Einstein-Maxwell theory, beyond which the
electrically charged AdS_2 \times S^3 vacuum solution becomes unstable. We
generalize the result to a general class of gravity theories involving
Chern-Simons and/or transgression terms and find their upper bounds for
stability. We show that supergravities with AdS \times Sphere vacua satisfy the
bounds.Comment: 18 pages, no figures, revised version to appear in JHE
Half-integer Higher Spin Fields in (A)dS from Spinning Particle Models

We make use of O(2r+1) spinning particle models to construct linearized
higher-spin curvatures in (A)dS spaces for fields of arbitrary half-integer
spin propagating in a space of arbitrary (even) dimension: the field
potentials, whose curvatures are computed with the present models, are
spinor-tensors of mixed symmetry corresponding to Young tableaux with D/2 - 1
rows and r columns, thus reducing to totally symmetric spinor-tensors in four
dimensions. The paper generalizes similar results obtained in the context of
integer spins in (A)dS.Comment: 1+18 pages; minor changes in the notation, references updated.
  Published versio
Implications of large CP Violation in B mixing for Supersymmetric
  Standard Models

Following the anomalous like-sign dimuon charge asymmetry measured by the D0
collaboration at the Tevatron collider we discuss the implications of large CP
violation in $B_{d,s}$ mixing for Supersymmetric (SUSY) Standard Models,
focussing on those models which allow a family symmetry and unification. For
the Minimal Supersymmetric Standard Model (MSSM) we show that it is only
possible to account for $B_{s}$ mixing and CP violation at the expense of large
squark mixing which would require a new approach to family symmetry models. In
order to describe both $B_{s}$ and $B_{d}$ mixing and CP violation we are led
to consider SUSY models with Higgs fields transforming as triplets under a
family symmetry. We describe a realistic such model based on $\Delta_{27}$
family symmetry in which tree-level exchange of the second Higgs family
predicts $B_{s}$ and $B_{d}$ mixing and CP violation in good agreement with a
recent global fit, while naturally suppressing flavour and CP violation
involving the first and second quark and lepton families.Comment: 19 pages, 3 figures, references added, version to appear in JHE
Higher Spin Gauge Theory and Holography: The Three-Point Functions

In this paper we calculate the tree level three-point functions of Vasiliev's
higher spin gauge theory in AdS4 and find agreement with the correlators of the
free field theory of N massless scalars in three dimensions in the O(N) singlet
sector. This provides substantial evidence that Vasiliev theory is dual to the
free field theory, thus verifying a conjecture of Klebanov and Polyakov. We
also find agreement with the critical O(N) vector model, when the bulk scalar
field is subject to the alternative boundary condition such that its dual
operator has classical dimension 2.Comment: 90 pages, 5 figures; v4, minor changes in the introductio
Canonical Gauge Coupling Unification in the Standard Model with
  High-Scale Supersymmetry Breaking

Inspired by the string landscape and the unified gauge coupling relation in
the F-theory Grand Unified Theories (GUTs) and GUTs with suitable
high-dimensional operators, we study the canonical gauge coupling unification
and Higgs boson mass in the Standard Model (SM) with high-scale supersymmetry
breaking. In the SM with GUT-scale supersymmetry breaking, we achieve the gauge
coupling unification at about 5.3 x 10^{13} GeV, and the Higgs boson mass is
predicted to range from 130 GeV to 147 GeV. In the SM with supersymmetry
breaking scale from 10^4 GeV to 5.3 x 10^{13} GeV, gauge coupling unification
can always be realized and the corresponding GUT scale M_U is from 10^{16} GeV
to 5.3 x 10^{13} GeV, respectively. Also, we obtain the Higgs boson mass from
114.4 GeV to 147 GeV. Moreover, the discrepancies among the SM gauge couplings
at the GUT scale are less than about 4-6%. Furthermore, we present the SU(5)
and SO(10) models from the F-theory model building and orbifold constructions,
and show that we do not have the dimension-five and dimension-six proton decay
problems even if M_U \le 5 x 10^{15} GeV.Comment: RevTex4, 16 pages, 5 figures, version to appear in JHE
The FZZ duality with boundary

The Fateev-Zamolodchikov-Zamolodchikov (FZZ) duality relates Witten's cigar
model to sine-Liouville theory. This duality was proven in the path integral
formulation and extended to the case of higher genus closed Riemann surfaces by
Schomerus and one of the authors. In this note we further extend the duality to
the case with boundary. Specifically, we relate D1-branes in the cigar model to
D2-branes in the sine-Liouville theory. In particular, the boundary action for
D2-branes in the sine-Liouville theory is constructed. We also consider the
fermionic version of the FZZ duality. This duality was proven as a mirror
symmetry by Hori and Kapustin, but we give an alternative proof in the path
integral formulation which directly relates correlation functions. Also here
the case with boundary is investigated and the results are consistent with
those for branes in N=2 super Liouville field theory obtained by Hosomichi.Comment: 41 pages, 2 figures; v2: extended published versio
Quantum moduli space of Chern-Simons quivers, wrapped D6-branes and
  AdS4/CFT3

We study the quantum moduli space of N=2 Chern-Simons quivers with generic
ranks and CS levels, proving along the way exact formulas for the charges of
bare monopole operators. We then derive N=2 Chern-Simons quiver theories dual
to AdS_4 x Y^{p,q}(CP2) M-theory backgrounds, for the whole family of
Sasaki-Einstein seven-manifolds and for any value of the torsion G_4 flux. The
derivation of the gauge theories relies on the reduction to type IIA string
theory, in which M2-branes become D2-branes while the conical geometry maps to
RR flux and D6-branes wrapped on compact four-cycles. M5-branes on torsion
cycles map to flux and wrapped D4-branes. The moduli space of the quiver is
shown to contain the corresponding CY_4 cone and all its crepant resolutions.Comment: 49+20 pages, 6 figures; v2: typos fixed, references added, 49+21
  page
Warped Radion Dark Matter

Warped scenarios offer an appealing solution to the hierarchy problem. We
consider a non-trivial deformation of the basic Randall-Sundrum framework that
has a KK-parity symmetry. This leads to a stable particle beyond the Standard
Model, that is generically expected to be the first KK-parity odd excitation of
the radion field. We consider the viability of the KK-radion as a DM candidate
in the context of thermal and non-thermal production in the early universe. In
the thermal case, the KK-radion can account for the observed DM density when
the radion decay constant is in the natural multi-TeV range. We also explore
the effects of coannihilations with the first KK excitation of the RH top, as
well as the effects of radion-Higgs mixing, which imply mixing between the
KK-radion and a KK-Higgs (both being KK-parity odd). The non-thermal scenario,
with a high radion decay constant, can also lead to a viable scenario provided
the reheat temperature and the radion decay constant take appropriate values,
although the reheat temperature should not be much higher than the TeV scale.
Direct detection is found to be feasible if the DM has a small (KK-parity odd)
Higgs admixture. Indirect detection via a photon signal from the galactic
center is an interesting possibility, while the positron and neutrino fluxes
from KK-radion annihilations are expected to be rather small. Colliders can
probe characteristic aspects of the DM sector of warped scenarios with
KK-parity, such as the degeneracy between the radion and the KK-radion (DM)
modes.Comment: 43 pages, 16 figures; added reference