pinecone/core-2020-05-10-deduplication huggingface dataset:
Tame D-tadpoles in gauge mediation

We revisit models of gauge mediated supersymmetry breaking where messenger
parity is violated. Such a symmetry is usually invoked in order to set to zero
potentially dangerous hypercharge D-term tadpoles. A milder hypothesis is that
the D-tadpole vanishes only at the first order in the gauge coupling constant.
Then the next order leads to a contribution to the sfermion masses which is of
the same magnitude as the usual radiative one. This enlarges the parameter
space of gauge mediated models. We first give a completely general
characterization of this contribution, in terms of particular three-point
functions of hidden sector current multiplet operators. We then explore the
parameter space by means of two simple weakly coupled models, where the
D-tadpole arising at two-loops has actually a mild logarithmic divergence.Comment: 13 pages + 9 pages of appendix, 1 figure; v2: some clarifying
  comments added, version to appear in JHE
Higgs Signatures in Inverse Seesaw Model at the LHC

In the inverse seesaw mechanism where the spontaneously broken B-L symmetry
induces tiny B-L violating Majorana masses for right-handed neutrinos,
non-standard Higgs signatures can arise due to a possible Higgs doublet and
singlet mixing and/or Higgs boson decays to a left- and right-handed neutrino.
This leads to a remarkable feature of hadronically quiet di-lepton final states
which can exhibit, in particular, lepton flavour violating signatures coming
from flavour-dependent neutrino Yukawa couplings. In this process, one lepton
coming from the right-handed decay could be soft enough can be missed by the
trigger level cuts of CMS and ATLAS for the di-lepton plus missing energy
signature. The prospects of such a signature are investigated for 8 TeV and 14
TeV center of mass energy of the LHC, taking the maximum value of the allowed
neutrino Yukawa coupling and the right-handed neutrino mass of 100 GeV. A
PYTHIA level simulation shows that the integrated luminosity of 10--20/fb and
1.6/fb for 8 TeV is required to observe the inclusive leptonic and lepton
flavour violating signatures, respectively. For 14 TeV, the reach is more and a
larger parameter space of the inverse seesaw model can be probed.Comment: 25 pages, 10 figures and 10 table
TeV scale mirage mediation in NMSSM

We study the next-to-minimal supersymmetric standard model. We consider soft
supersymmetry breaking parameters, which are induced by the mirage mediation
mechanism of supersymmetry breaking. We concentrate on the mirage mediation,
where the so-called mirage scale is the TeV scale. In this scenario, we can
realize the up-type Higgs soft mass of O(200) GeV, while other masses such as
gaugino masses and stop masses are heavy such as 1 TeV or more. Cancellation
between the effective \mu-term and the down-type Higgs soft mass ameliorates
the fine-tuning in the electroweak symmetry breaking even for \mu=O(500) GeV.
The mixing between the doublet and singlet Higgs bosons is suppressed by
(\lambda/\kappa)/tan\beta. Then the lightest doublet Higgs mass naturally
reaches 125 GeV lifted by the new quartic coupling. The higgsino and singlino
are light and their linear combination is the lightest superparticle.Comment: 24 pages, 24 figures, Numerical analysis is replaced with the version
  calculated by NMSSMTools. Comments and references are added on the suppressed
  doublet-singlet mixing and cases in which the 125 GeV boson is the 2nd
  lightest CP-even scalar. The version accepted by JHE
Non extremal geometries and holographic phase transitions

Using the low energy limit of type IIB superstring theory, we obtain the
non-extremal limit of deformed conifold geometry which is dual to the IR limit
of large N thermal QCD.At low temperatures, the extremal geometry without black
hole is favored while at high temperatures, the field theory is described by
non-extremal black hole geometry. We compute the ten dimensional on shell
action for extremal and non-extremal geometries and demonstrate that at a
critical temperature $T_c$ there is a first order confinement to deconfinement
phase transition. We compute $T_c$ as a function of 'tHooft coupling and study
the thermodynamics of the dual gauge theory by evaluating the free energy and
entropy of the ten dimensional geometry. We find agreement with the conformal
limit while thermodynamics of non-conformal strongly coupled gauge theories is
explored using the black hole geometries in non-AdS space.Comment: There was an algebraic mistake in the earlier version, which has been
  corrected. This alters some factors in the critical horizon calculation but
  the physics remains unchange
Classification of symmetric toroidal orbifolds

We provide a complete classification of six-dimensional symmetric toroidal
orbifolds which yield N>=1 supersymmetry in 4D for the heterotic string. Our
strategy is based on a classification of crystallographic space groups in six
dimensions. We find in total 520 inequivalent toroidal orbifolds, 162 of them
with Abelian point groups such as Z_3, Z_4, Z_6-I etc. and 358 with non-Abelian
point groups such as S_3, D_4, A_4 etc. We also briefly explore the properties
of some orbifolds with Abelian point groups and N=1, i.e. specify the Hodge
numbers and comment on the possible mechanisms (local or non-local) of gauge
symmetry breaking.Comment: 51 pages, 24 figure
Quantum black holes in Type-IIA String Theory

We study black hole solutions of Type-IIA Calabi-Yau compactifications in the
presence of perturbative quantum corrections. We define a class of black holes
that only exist in the presence of quantum corrections and that, consequently,
can be considered as purely quantum black holes. The regularity conditions of
the solutions impose the topological constraint h^{1,1}>h^{2,1} on the
Calabi-Yau manifold, defining a class of admissible compactifications, which we
prove to be non-empty for h^{1,1}=3 by explicitly constructing the
corresponding Calabi-Yau manifolds, new in the literature.Comment: 17 pages. References added. Explanation of the truncation improve
Spontaneous R-symmetry breaking from the renormalization group flow

We propose a mechanism of R-symmetry breaking in four-dimensional DSB models
based on the RG properties of the coupling constants. By constraining the UV
sector, we generate new hierarchies amongst the couplings that allow a
spontaneously broken R-symmetry in models with pure chiral fields of R-charges
R = 0 and R = 2 only. The result is obtained by a combination of one- and
two-loop effects, both at the origin of field space and in the region dominated
by leading log potentials.Comment: 12 pages, 5 figures, published in JHE
No Line on the Horizon: On Uniform Acceleration and Gluonic Fields at
  Strong Coupling

We study a few assorted questions about the behavior of strings on anti-de
Sitter spacetime (AdS), or equivalently, `flux tubes' in strongly-coupled
conformal field theories (CFTs). For the case where the `flux tube' is sourced
by a uniformly accelerated quark (or, more generally, a quark that asymptotes
to uniform acceleration in the remote past), we point out that the dual string
embedding known heretofore terminates unphysically at the worldsheet horizon,
and identify the correct continuation, which is found to encode a gluonic shock
wave. For arbitrary quark motion, we show that, contrary to common
understanding, the worldsheet horizon does not in general represent a dividing
line between the portions of the string respectively dual to the quark and to
the gluonic radiation emitted by it.Comment: 1+24 pages, 11 figures; v2: minor changes, including addition of
  footnote
An off-shell formulation for internally gauged D=5, N=2 supergravity from superconformal methods

We use the superconformal method to construct a new formulation for pure off-shell D=5, N=2 Poincaré supergravity and present its internal gauging. The main difference between the traditional formulation and our new formulation is the choice of the Dilaton Weyl Multiplet as the background Weyl Multiplet and the choice of a Linear compensating Multiplet. We do not introduce an external Vector Multiplet to gauge the theory, but instead use the internal vector of the Dilaton Weyl Multiplet. We show that the corresponding on-shell theory is Einstein-Maxwell supergravity. We believe that this gauging method can be applied in more complicated scenarios such as the inclusion of off-shell higher derivative invariants.status: publishe
General Argyres-Douglas Theory

We construct a large class of Argyres-Douglas type theories by compactifying
six dimensional (2,0) A_N theory on a Riemann surface with irregular
singularities. We give a complete classification for the choices of Riemann
surface and the singularities. The Seiberg-Witten curve and scaling dimensions
of the operator spectrum are worked out. Three dimensional mirror theory and
the central charges a and c are also calculated for some subsets, etc. Our
results greatly enlarge the landscape of N=2 superconformal field theory and in
fact also include previous theories constructed using regular singularity on
the sphere.Comment: 55 pages, 20 figures, minor revision and typos correcte
Running with Rugby Balls: Bulk Renormalization of Codimension-2 Branes

We compute how one-loop bulk effects renormalize both bulk and brane
effective interactions for geometries sourced by codimension-two branes. We do
so by explicitly integrating out spin-zero, -half and -one particles in
6-dimensional Einstein-Maxwell-Scalar theories compactified to 4 dimensions on
a flux-stabilized 2D geometry. (Our methods apply equally well for D dimensions
compactified to D-2 dimensions, although our explicit formulae do not capture
all divergences when D>6.) The renormalization of bulk interactions are
independent of the boundary conditions assumed at the brane locations, and
reproduce standard heat-kernel calculations. Boundary conditions at any
particular brane do affect how bulk loops renormalize this brane's effective
action, but not the renormalization of other distant branes. Although we
explicitly compute our loops using a rugby ball geometry, because we follow
only UV effects our results apply more generally to any geometry containing
codimension-two sources with conical singularities. Our results have a variety
of uses, including calculating the UV sensitivity of one-loop vacuum energy
seen by observers localized on the brane. We show how these one-loop effects
combine in a surprising way with bulk back-reaction to give the complete
low-energy effective cosmological constant, and comment on the relevance of
this calculation to proposed applications of codimension-two 6D models to
solutions of the hierarchy and cosmological constant problems.Comment: 42 pages + appendices. This is the final version which appears in
  JHE
Top pair Asymmetries at Hadron colliders with general $Z'$ couplings

Recently it has been shown that measurement of charge asymmetry of top pair
production at LHC excludes any flavor violating $Z'$ vector gauge boson that
could explain Tevatron forward-backward asymmetry (FBA). We consider the
general form of a $Z'$ gauge boson including left-handed, right-handed vector
and tensor couplings to examine FBA and charge asymmetry. To evaluate top pair
asymmetries at Tevatron and LHC, we consider $B^0_q$ mixing constraints on
flavor changing $Z'$ couplings and show that this model still explain
forward-backward asymmetry at Tevatron and charge asymmetry can not exclude it
in part of parameters space.Comment: 18 pages, 7 figure
Heavy neutrino decays at MiniBooNE

It has been proposed that a sterile neutrino \nu_h with m_h \approx 50 MeV
and a dominant decay mode (\nu_h -> \nu\gamma) may be the origin of the
experimental anomaly observed at LSND. We define a particular model that could
also explain the MiniBooNE excess consistently with the data at other neutrino
experiments (radiative muon capture at TRIUMF, T2K, or single photon at NOMAD).
The key ingredients are (i) its long lifetime (\tau_h\approx 3-7x10^{-9} s),
which introduces a 1/E dependence with the event energy, and (ii) its Dirac
nature, which implies a photon preferably emitted opposite to the beam
direction and further reduces the event energy at MiniBooNE. We show that these
neutrinos are mostly produced through electromagnetic interactions with nuclei,
and that T2K observations force BR(\nu_h -> \nu_\tau\gamma) \le 0.01 \approx
BR(\nu_h -> \nu_\mu\gamma). The scenario implies then the presence of a second
sterile neutrino \nu_{h'} which is lighter, longer lived and less mixed with
the standard flavors than \nu_h. Since such particle would be copiously
produced in air showers through (\nu_h -> \nu_{h'}\gamma) decays, we comment on
the possible contamination that its photon-mediated elastic interactions with
matter could introduce in dark matter experiments.Comment: 18 pages, typo in Eq.(6) correcte
Bi-local Construction of Sp(2N)/dS Higher Spin Correspondence

We derive a collective field theory of the singlet sector of the Sp(2N) sigma
model. Interestingly the hamiltonian for the bilocal collective field is the
same as that of the O(N) model. However, the large-N saddle points of the two
models differ by a sign. This leads to a fluctuation hamiltonian with a
negative quadratic term and alternating signs in the nonlinear terms which
correctly reproduces the correlation functions of the singlet sector. Assuming
the validity of the connection between O(N) collective fields and higher spin
fields in AdS, we argue that a natural interpretation of this theory is by a
double analytic continuation, leading to the dS/CFT correspondence proposed by
Anninos, Hartman and Strominger. The bi-local construction gives a map into the
bulk of de Sitter space-time. Its geometric pseudospin-representation provides
a framework for quantization and definition of the Hilbert space. We argue that
this is consistent with finite N grassmanian constraints, establishing the
bi-local representation as a nonperturbative framework for quantization of
Higher Spin Gravity in de Sitter space.Comment: 1 figur
On Loops in Inflation II: IR Effects in Single Clock Inflation

In single clock models of inflation the coupling between modes of very
different scales does not have any significant dynamical effect during
inflation. It leads to interesting projection effects. Larger and smaller modes
change the relation between the scale a mode of interest will appear in the
post-inflationary universe and will also change the time of horizon crossing of
that mode. We argue that there are no infrared projection effects in physical
questions, that there are no effects from modes of longer wavelength than the
one of interest. These potential effects cancel when computing fluctuations as
a function of physically measurable scales. Modes on scales smaller than the
one of interest change the mapping between horizon crossing time and scale. The
correction to the mapping computed in the absence of fluctuations is enhanced
by a factor N_e, the number of e-folds of inflation between horizon crossing
and reheating. The new mapping is stochastic in nature but its variance is not
enhanced by N_e.Comment: 13 pages, 1 figure; v2: JHEP published version, added minor comments
  and reference
A note on supersymmetric AdS_6 solutions of massive type IIA
  supergravity

Motivated by the AdS_6/CFT_5 correspondence, we study general supersymmetric
solutions of massive type IIA supergravity, consisting of a warped product of
six-dimensional anti-de Sitter space AdS_6 with a four-dimensional Riemannian
manifold M_4, and fluxes compatible with the SO(5,2) symmetry. We find that the
only local solution of this form is the warped AdS_6 x_w S^4 solution,
originally discovered by Brandhuber and Oz. We discuss the supersymmetric
properties of this solution.Comment: 18 page
Non-Perturbative Superpotentials in F-theory and String Duality

We use open-closed string duality between F-theory on K3xK3 and type II
strings on CY manifolds without branes to study non-perturbative
superpotentials in generalized flux compactifications. On the F-theory side we
obtain the full flux potential including D3-instanton contributions and show
that it leads to an explicit and simple realization of the three ingredients of
the KKLT model for stringy dS vacua. The D3-instanton contribution is highly
non-trivial, can be systematically computed including the determinant factors
and demonstrates that a particular flux lifts very effectively zero modes on
the instanton. On the closed string side, we propose a generalization of the
Gukov-Vafa-Witten superpotential for type II strings on generalized CY
manifolds, depending on all moduli multiplets.Comment: 49 pages, harvmac, 1 figure; references & figures adde
Muon conversion to electron in nuclei in type-I seesaw models

We compute the muon to electron conversion in the type-I seesaw model, as a
function of the right-handed neutrino mixings and masses. The results are
compared with previous computations in the literature. We determine the
definite predictions resulting for the ratios between the muon to electron
conversion rate for a given nucleus and the rate of two other processes which
also involve a mu-e flavour transition: mu -> e gamma and mu -> eee. For a
quasi-degenerate mass spectrum of right-handed neutrino masses -which is the
most natural scenario leading to observable rates- those ratios depend only on
the seesaw mass scale, offering a quite interesting testing ground. In the case
of sterile neutrinos heavier than the electroweak scale, these ratios vanish
typically for a mass scale of order a few TeV. Furthermore, the analysis
performed here is also valid down to very light masses. It turns out that
planned mu -> e conversion experiments would be sensitive to masses as low as 2
MeV. Taking into account other experimental constraints, we show that future mu
-> e conversion experiments will be fully relevant to detect or constrain
sterile neutrino scenarios in the 2 GeV-1000 TeV mass range.Comment: 32 pages 14 figures, references added and some minor precisions;
  results unchange
Bosonic Fractionalisation Transitions

At finite density, charge in holographic systems can be sourced either by
explicit matter sources in the bulk or by bulk horizons. In this paper we find
bosonic solutions of both types, breaking a global U(1) symmetry in the former
case and leaving it unbroken in the latter. Using a minimal bottom-up model we
exhibit phase transitions between the two cases, under the influence of a
relevant operator in the dual field theory. We also embed solutions and
transitions of this type in M-theory, where, holding the theory at constant
chemical potential, the cohesive phase is connected to a neutral phase of
Schr\"odinger type via a z=2 QCP.Comment: references added. minor changes. version published in JHE
Can R-parity violation hide vanilla supersymmetry at the LHC?

Current experimental constraints on a large parameter space in supersymmetric
models rely on the large missing energy signature. This is usually provided by
the lightest neutralino which stability is ensured by the R-parity. However, if
the R-parity is violated, the lightest neutralino decays into the standard
model particles and the missing energy cut is not efficient anymore. In
particular, the UDD type R-parity violation induces the neutralino decay to
three quarks which potentially leads to the most difficult signal to be
searched at hadron colliders. In this paper, we study the constraints on the
R-parity violating supersymmetric model using a same-sign dilepton and a
multijet signatures. We show that the gluino and squarks lighter than a TeV are
already excluded in constrained minimal supersymmetric standard model with
R-parity violation if their masses are approximately equal. We also analyze
constraints in a simplified model with R-parity violation. We compare how
R-parity violation changes some of the observables typically used to
distinguish a supersymmetric signal from standard model backgrounds.Comment: 14 pages, 4 figure
Inflating in a Trough: Single-Field Effective Theory from Multiple-Field
  Curved Valleys

We examine the motion of light fields near the bottom of a potential valley
in a multi-dimensional field space. In the case of two fields we identify three
general scales, all of which must be large in order to justify an effective
low-energy approximation involving only the light field, $\ell$. (Typically
only one of these -- the mass of the heavy field transverse to the trough -- is
used in the literature when justifying the truncation of heavy fields.) We
explicitly compute the resulting effective field theory, which has the form of
a $P(\ell,X)$ model, with $X = - 1/2(\partial \ell)^2$, as a function of these
scales. This gives the leading ways each scale contributes to any low-energy
dynamics, including (but not restricted to) those relevant for cosmology. We
check our results with the special case of a homogeneous roll near the valley
floor, placing into a broader context recent cosmological calculations that
show how the truncation approximation can fail. By casting our results
covariantly in field space, we provide a geometrical criterion for
model-builders to decide whether or not the single-field and/or the truncation
approximation is justified, identify its leading deviations, and to efficiently
extract cosmological predictions.Comment: 28 pages + 3 appendices, references added and typos corrected,
  matches published versio
Higgs Couplings and Precision Electroweak Data

In light of the discovery of a Higgs-like particle at the LHC, we revisit the
status of the precision electroweak data, focusing on two discrepant
observables: 1) the long-standing 2.4 sigma deviation in the forward-backward
asymmetry of the bottom quark A_{FB}^b, and 2) the 2.3 sigma deviation in R_b,
the ratio of the Z \rightarrow b \bar b partial width to the inclusive hadronic
width, which is now in tension after a recent calculation including new
two-loop electroweak corrections. We consider possible resolutions of these
discrepancies. Taking the data at face value, the most compelling scenario is
that new physics directly affects A_{FB}^b and R_b, bringing the prediction
into accord with the measured values. We propose a modified `Beautiful Mirrors'
scenario which contains new vector-like quarks that mix with the b quark,
modifying the Z b\bar b vertex and thus correcting A_{FB}^b and R_b. We show
that this scenario can lead to modifications to the production rates of the
Higgs boson in certain channels, and in particular a sizable enhancement in the
diphoton channel. We also describe additional collider tests of this scenario.Comment: 13 pages, 4 figure
Aging Logarithmic Conformal Field Theory : a holographic view

We consider logarithmic extensions of the correlation and response functions
of scalar operators for the systems with aging as well as Schr\"odinger
symmetry. Aging is known to be the simplest nonequilibrium phenomena, and its
physical significances can be understood by the two-time correlation and
response functions. Their logarithmic part is completely fixed by the bulk
geometry in terms of the conformal weight of the dual operator and the dual
particle number.
  Motivated by recent experimental realizations of Kardar-Parisi-Zhang
universality class in growth phenomena and its subsequent theoretical extension
to aging, we investigate our two-time correlation functions out of equilibrium,
which show several qualitatively different behaviors depending on the
parameters in our theory. They exhibit either growing or aging, i.e. power-law
decaying, behaviors for the entire range of our scaling time. Surprisingly, for
some parameter ranges, they exhibit growing at early times as well as aging at
later times.Comment: 1+26 pages, 15 figure