pinecone/core-2020-05-10-deduplication huggingface dataset:
Constraining parameter space in type-II two-Higgs doublet model in light
  of a 126 GeV Higgs boson

We explore the implications of a 126 GeV Higgs boson indicated by the recent
LHC results for two-Higgs doublet model (2HDM). Identifying the 126 GeV Higgs
boson as either the lighter or heavier of CP even neutral Higgs bosons in 2HDM,
we examine how the masses of Higgs fields and mixing parameters can be
constrained by the theoretical conditions and experimental constraints. The
theoretical conditions taken into account are the vacuum stability,
perturbativity and unitarity required to be satisfied up to a cut-off scale. We
also show how bounds on the masses of Higgs bosons and mixing parameters depend
on the cut-off scale. In addition, we investigate whether the allowed regions
of parameter space can accommodate particularly the enhanced di-photon signals,
ZZ* and WW* decay modes of the Higgs boson, and examine the prediction of the
signal strength of Z{\gamma} decay mode for the allowed regions of the
parameter space.Comment: To be published in JHEP, 20 pages, 11 figures, Figures and results
  are updated for the recent LHC result
Perturbations in Chromo-Natural Inflation

Chromo-Natural Inflation is the first worked example of a model of inflation
in which slow-roll inflation is achieved by "magnetic drift" as opposed to
Hubble friction. In this work, we give an account of the perturbations at
linear order in this model. Our analysis uncovers two novel phenomena. First,
the amplitude of scalar curvature perturbations is not directly tied to the
shape of the inflationary potential. This allows the theory to violate na\"ive
formulations of the Lyth bound. Second, the tensor sector of the theory is
significantly altered from the usual case: the non-Abelian gauge field
perturbations have a tensor degree of freedom. One chirality of the this tensor
can be exponentially enhanced by a temporary instability near horizon crossing;
this chiral instability exists because of the classical gauge field background,
which violates parity. These tensor fluctuations of the gauge field also couple
to gravitational waves at linear order in perturbation theory and source a
chiral spectrum of gravitational waves. This spectrum can be exponentially
enhanced over the usual inflationary spectrum due to the instability in the
gauge sector. These new features cause the theory in its present form to be in
significant tension with current observational data. This is because the new
scalar physics leads to a significant reddening of the spectral tilt in the
same region of parameter space where the exponential enhancement of the
gravitational wave amplitude is small enough to satisfy current constraints on
the tensor-to-scalar index. Hence, the model either predicts a spectral tilt
that is too red, or it overproduces gravitational waves, or both.Comment: References and minor comments added, plus expanded discussion of the
  relation to Gauge-flation; version accepted for publication in JHE
Double Scaling in Tensor Models with a Quartic Interaction

In this paper we identify and analyze in detail the subleading contributions
in the 1/N expansion of random tensors, in the simple case of a quartically
interacting model. The leading order for this 1/N expansion is made of graphs,
called melons, which are dual to particular triangulations of the D-dimensional
sphere, closely related to the "stacked" triangulations. For D<6 the subleading
behavior is governed by a larger family of graphs, hereafter called cherry
trees, which are also dual to the D-dimensional sphere. They can be resummed
explicitly through a double scaling limit. In sharp contrast with random matrix
models, this double scaling limit is stable. Apart from its unexpected upper
critical dimension 6, it displays a singularity at fixed distance from the
origin and is clearly the first step in a richer set of yet to be discovered
multi-scaling limits
Determination of the neutrino mass ordering by combining PINGU and Daya
  Bay II

The relatively large measured value of theta_13 has opened various
possiblities to determine the neutrino mass ordering, among them using PINGU,
the low-energy extention of the IceCube neutrino telescope, to observe matter
effects in atmospheric neutrinos, or a high statistics measurment of the
neutrino energy spectrum at a reactor neutrino experiment with a baseline of
around 60 km, such as the Daya Bay II project. In this work we point out a
synergy between these two approaches based on the fact that when data are
analysed with the wrong neutrino mass ordering the best fit occurs at different
values of |Delta m^2_31| for PINGU and Daya Bay II. Hence, the wrong mass
ordering can be excluded by a mismatch of the values inferred for |Delta
m^2_31|, thanks to the excellent accuracy for Delta m^2_31 of both experiments.
We perform numerical studies of PINGU and Daya Bay II sensitivities and show
that the synergy effect may lead to a high significance determination of the
mass ordering even in situations where the individual experiments obtain only
poor sensitivity.Comment: 23 pages, 7 figures (15 eps files), typos and minor mistakes
  corrected, final version to appear in JHE
Highlights of Supersymmetric Hypercharge $\pm1$ Triplets

The discovery of a standard model (SM)-like Higgs boson with a relatively
heavy mass $m_h$ and hints of di-photon excess has deep implication to
supersymmetric standard models (SSMs). We consider the SSM extended with
hypercharge $\pm1$ triplets, and investigate two scenarios of it: (A) Triplets
significantly couple to the Higgs doublets, which can substantially raise $m_h$
and simultaneously enhance the Higgs to di-photon rate via light chargino
loops; (B) Oppositely, these couplings are quite weak and thus $m_h$ can not be
raised. But the doubly-charged Higgs bosons, owing to the gauge group
structure, naturally interprets why there is an excess rather than a deficient
of Higgs to di-photon rate. Additionally, the pseudo Dirac triplet fermion is
an inelastic non-thermal dark matter candidate. Light doubly-charged particles,
especially the doubly-charged Higgs boson around 100 GeV in scenario B, are
predicted. We give a preliminary discussion on their search at the LHC.Comment: JHEP version. Typos fixed, comments, references and acknowledge adde
A Class of Inert N-tuplet Models with Radiative Neutrino Mass and Dark
  Matter

We present a class of models with radiative neutrino mass and stable
dark-matter candidates. Neutrino mass is generated by a one-loop diagram with
the same topography as Ma's 2006 proposal (which used an inert scalar-doublet
and singlet fermion). We generalize this approach and determine all variants
with new fields no larger than the adjoint representation. When the neutrino
mass diagram contains a Majorana mass insertion there are two possibilities,
both of which are known. If the mass insertion is of the Dirac type there are
seven additional models, two of which are excluded by direct-detection
experiments. The other five models are also constrained, such that only scalar
dark-matter is viable. There are cases with an inert singlet, an inert doublet,
and an inert triplet, providing a natural setting for inert N-tuplet models of
dark matter, with the additional feature of achieving radiative neutrino mass.
We show that some of the models admit a simple explanation for the (requisite)
discrete symmetry, and briefly discuss cases with representations larger than
the adjoint, which can admit a connection to the astrophysical gamma-ray
signal.Comment: 1+22 pages; v2 journal versio
On form factors and Macdonald polynomials

We are developing the algebraic construction for form factors of local
operators in the sinh-Gordon theory proposed in [B.Feigin, M.Lashkeivch, 2008].
We show that the operators corresponding to the null vectors in this
construction are given by the degenerate Macdonald polynomials with rectangular
partitions and the parameters $t=-q$ on the unit circle. We obtain an integral
representation for the null vectors and discuss its simple applications.Comment: 13 pages; v2: eq. (4.1) corrected; v3: minor corrections, references
  added; v4: eq. (2.6) and the last equation of sect. 5 corrected; references
  updated; more minor corrections; v5: eq. (4.1) corrected agai
Non-Abelian discrete R symmetries

We discuss non-Abelian discrete R symmetries which might have some
conceivable relevance for model building. The focus is on settings with N=1
supersymmetry, where the superspace coordinate transforms in a one-dimensional
representation of the non-Abelian discrete symmetry group. We derive anomaly
constraints for such symmetries and find that novel patterns of Green-Schwarz
anomaly cancellation emerge. In addition we show that perfect groups, also in
the non-R case, are always anomaly-free. An important property of models with
non-Abelian discrete R symmetries is that superpartners come in different
representations of the group. We present an example model, based on a
semidirect product of a Z_3 and a Z_8^R symmetry, to discuss generic features
of models which unify discrete R symmetries, entailing solutions to the mu and
proton decay problems of the MSSM, with non-Abelian discrete flavor symmetries.Comment: 21 page
A Skyrme-like model with an exact BPS bound

We propose a new Skyrme-like model with fields taking values on the sphere
S^3 or, equivalently, on the group SU(2). The action of the model contains a
quadratic kinetic term plus a quartic term which is the same as that of the
Skyrme-Faddeev model. The novelty of the model is that it possess a first order
Bogomolny type equation whose solutions automatically satisfy the second order
Euler-Lagrange equations. It also possesses a lower bound on the static energy
which is saturated by the Bogomolny solutions. Such Bogomolny equation is
equivalent to the so-called force free equation used in plasma and solar
Physics, and which possesses large classes of solutions. An old result due to
Chandrasekhar prevents the existence of finite energy solutions for the force
free equation on the entire tridimensional space R^3. We construct new exact
finite energy solutions to the Bogomolny equations for the case where the space
is the three-sphere S^3, using toroidal like coordinates.Comment: 12 pages, no figure
Implications of light charginos for Higgs observables, LHC searches and
  dark matter

A rather high Higgs mass, m_h = 126 GeV, suggests that at least a part of the
supersymmetric spectrum of the MSSM may live beyond O(1TeV) and hence
inaccessible to the LHC. However, there are theoretical and phenomenological
reasons supporting a possibility that charginos and neutralinos remain much
closer to the electroweak scale. In this paper, we explore such a scenario in
the light of recent Higgs measurements, mainly its di-photon decay rate, where
the data might indicate a slight excess over the SM prediction. That excess
could be fitted by the contribution of light charginos provided tan(beta) is
low to moderate, a possibility that is receiving much attention for other
theoretical reasons. We investigate the implications of this scenario for other
observables, such as dark matter constraints, electroweak observables and
experimental signals at the LHC, like di-lepton, tri-lepton and same-sign
dilepton. An important part of the models survive all the constraints and are
able to give positive signals at LHC-14TeV and/or XENON1T.Comment: 21 pages, 10 figure
Horizon instability of massless scalar perturbations of an extreme
  Reissner-Nordstr\"om-AdS black hole

We study the stability of extreme Reissner-Nordstr\"om-AdS black hole under
massless scalar perturbations. We show that the perturbation on the horizon of
the extreme Reissner-Nordstr\"om-AdS black hole experiences a power-law decay,
instead of an exponential decay as observed in the nonextreme AdS black hole.
On the horizon of the extreme Reissner-Nordstr\"om-AdS black hole, the blow up
happens at lower order derivative of the scalar field compared with that of the
extreme Reissner-Nordstr\"om black hole, which shows that extreme AdS black
holes tend to instability in comparison to black holes in asymptotic flat
space-times.Comment: 20 pages,7 figures, match published versio
R-Charged Black Holes and Holographic Optics

We analyze momentum dependent vector modes in the context of gauge theories
dual to R-charged black holes in $D=4$, $5$ and $7$. For a variety of examples,
the master variables are constructed, for which the linearized equations for
the perturbations decouple. These allow for the computation of momentum
dependent correlation functions. Away from the hydrodynamic limit, numerical
analysis using the decoupled equations of motion is used to obtain the
analogues of the Depine-Lakhtakia (DL) index. For specified ranges of
frequencies, a negative index of refraction is seen to occur in all cases.Comment: 1 + 26 Pages, LaTeX, 8 .eps figures. Some discussions expanded.
  Published versio
On messengers couplings in extended GMSB models

We discuss, for the first time, the role of the superpotential couplings of
three messenger fields in a GMSB-type unification model in which messenger
sector consists of both 5+5bar and 10+10bar of SU(5). It turns out that these
interactions are relevant when coexist with appropriate messenger-MSSM
couplings. Then they induce extra contributions to 2-loop soft masses. In the
present model, we derive all such soft terms and discuss constraints which have
to be satisfied to avoid rapid proton decay and mu/B_mu problem. As an example,
it is shown how superpotential couplings of three messengers influence mass
spectra when the model is restricted by additional global U(1)_q symmetry. We
find that masses of the lightest sleptons are the most sensitive to those new
interactions, what in some cases results in the NLSP/NNLSP pattern in which
stau or selectron is lighter than the lightest neutralino.Comment: 20 pages, 3 figures, 16 table
Holographic entanglement beyond classical gravity

The Renyi entropies and entanglement entropy of 1+1 CFTs with gravity duals
can be computed by explicit construction of the bulk spacetimes dual to
branched covers of the boundary geometry. At the classical level in the bulk
this has recently been shown to reproduce the conjectured Ryu-Takayanagi
formula for the holographic entanglement entropy. We study the one-loop bulk
corrections to this formula. The functional determinants in the bulk geometries
are given by a sum over certain words of generators of the Schottky group of
the branched cover. For the case of two disjoint intervals on a line we obtain
analytic answers for the one-loop entanglement entropy in an expansion in small
cross-ratio. These reproduce and go beyond anticipated universal terms that are
not visible classically in the bulk. We also consider the case of a single
interval on a circle at finite temperature. At high temperatures we show that
the one-loop contributions introduce expected finite size corrections to the
entanglement entropy that are not present classically. At low temperatures, the
one-loop corrections capture the mixed nature of the density matrix, also not
visible classically below the Hawking-Page temperature.Comment: 1+41 pages. Three figures. v2 References adde
The Differential of All Two-Loop MHV Amplitudes in N=4 Yang-Mills Theory

We present an explicit analytic calculation of the differential of the planar
n-particle, two-loop MHV scattering amplitude in N=4 super Yang-Mills theory.
The result is expressed only in terms of the polylogarithm functions Li_k(-x),
for k=1,2,3, with arguments x belonging to the special class of dual conformal
cross-ratios known as cluster X-coordinates. The surprising fact that these
amplitudes may be expressed in this way provides a striking example of the
manner in which the cluster structure on the kinematic configuration space
underlies the structure of amplitudes in SYM theory.Comment: 10 pages. v2: typos corrected, some formulas replaced with more
  concise versions. v3: discussion of parity added, other minor additions based
  on JHEP reviewer comment
Charged Dilatonic AdS Black Holes and Magnetic AdS_{D-2} x R^2 Vacua

We consider D-dimensional Einstein gravity coupled to two U(1) fields and a
dilaton with a scalar potential. We derive the condition that the analytical
AdS black holes with two independent charges can be constructed. Turning off
the cosmological constant, the extremal Reissner-Nordstrom black hole emerges
as the harmonic superposition of the two U(1) building blocks. With the
non-vanishing cosmological constant, our extremal solutions contain the
near-horizon geometry of AdS_2 x R^{D-2} with or without a hyperscaling. We
also obtain the magnetic AdS_{D-2} x Y^2 vacua where Y^2 can be R^2, S^2 or
hyperbolic 2-space. These vacua arise as the fix points of some super
potentials and recover the known supersymmetric vacua when the theory can be
embedded in gauged supergravities. The AdS_{D-2} x R^2 vacua are of particular
interest since they are dual to some quantum field theories at the lowest
Landau level. By studying the embedding of some of these solutions in the
string and M-theory, we find that the M2/M5-system with the equal M2 and M5
charges can intersect with another such M2/M5 on to a dyonic black hole.
Analogous intersection rule applies also to the D1/D5-system. The intersections
are non-supersymmetric but in the manner of harmonic superpositions.Comment: Latex, 26 pages, typos corrected and references added. To appear in
  JHE
QCD Reggeon Calculus From KLWMIJ/JIMWLK Evolution: Vertices,
  Reggeization and All

We show explicitly how the high energy QCD evolution generated by the KLWMIJ
Hamiltonian can be cast in the form of the QCD Reggeon Field Theory. We show
how to reduce the KLWMIJ Hamitonian to physical color singlet degrees of
freedom. We suggest a natural way of defining the Pomeron and other Reggeons in
the framework of the KLWMIJ evolution and derive the QCD Reggeon Field Theory
Hamiltonian which includes several lowest Reggeon operators. This Hamiltonian
generates evolution equations for all Reggeons in the case of dilute-dense
scattering, including the nonlinear Balitsky-Kovchegov equation for the
Pomeron. We also find explicit expressions for the Reggeon conjugate operators
in terms of QCD operators, and derive their evolution equations. This provides
a natural and unambiguous framework for reggeization procedure introduced in
\cite{BW, BE}. The Bartels triple Pomeron vertex is inherited directly from the
RFT Hamiltonian. For simplicity in the bulk of the paper we work in the large
$N_c$ limit.Comment: 44 pages; few typos corrected; a few comments and a couple of refs
  adde
Global Residues and Two-Loop Hepta-Cuts

We examine maximal unitarity in the nonplanar case and derive remarkably
compact analytic expressions for coefficients of master integrals with two-loop
crossed box topology in massless four-point amplitudes in any gauge theory,
thereby providing additional steps towards automated computation of the full
amplitude. The coefficients are obtained by assembling residues extracted
through integration on linear combinations of higher-dimensional tori
encircling global poles of the loop integrand. We recover all salient features
of two-loop maximal unitarity, such as the existence of unique projectors for
each master integral. Several explicit calculations are provided. We also
establish exact equivalence of our results and master integral coefficients
recently obtained via integrand-level reduction in any renormalizable gauge
theory.Comment: 38 pages, v2: minor changes, typos corrected, references added,
  journal versio
Non-Degenerate Squarks from Flavored Gauge Mediation

We study the squark spectra of Flavored Gauge Mediation Models, in which
messenger-matter superpotential couplings generate new, generation-dependent
contributions to the squark masses. The new couplings are controlled by the
same flavor symmetry that explains the fermion masses, leading to excellent
alignment of the quark and squark mass matrices. This allows for large squark
mass splittings consistent with all flavor bounds. In particular,
second-generation squarks are often significantly lighter than the
first-generation squarks. As squark production at the LHC is dominated by the
up- and down-squarks and the efficiencies for squark searches increase with
their masses, the charm and/or strange squark masses can be well below the
current LHC bounds. At the same time, even with a single set of messengers, the
models can generate large stop mixings which result in large loop contributions
to the Higgs mass.Comment: 16 pages, 2 figures. v2: Typo corrected, references adde
Neutralino dark matter confronted by the LHC constraints on Electroweak
  SUSY signals

The supersymmetric particles (sparticles) belonging exclusively to the
electroweak sector of the minimal supersymmetric standard model (MSSM) may hold
the key to the observed dark matter relic density in the universe even if all
strongly interacting sparticles are very heavy. The importance of the light EW
sparticles in DM physics and in producing spectacular collider signals is
emphasized. It is shown that even the preliminary data on the direct searches
of these sparticles at the LHC, significantly constrain the parameter space of
the MSSM compatible with the observed relic density and provide useful hints
about the future search prospects. If in addition to the electroweak sparticles
the gluinos are also within the reach of the LHC experiments, then the gluino
mass limits in the light slepton scenario obtained via the canonical jets +
$\met$ channel may be relaxed by as much as 25 $%$ compared to the existing
limits. But the corresponding same sign dilepton (SSD) + jets + $\met$ signal
will yield enhanced limits competitive with the strongest limits currently
available. This is illustrated with the help of benchmark scenarios at the
generator level using PYTHIA. If the gluinos are just beyond the current reach
of the LHC, then the generic n-lepton + m-jets + missing energy signal may
discriminate between different DM producing mechanisms by comparing the signals
corresponding to different values of n. This is illustrated by simulating the
signals for n = 0 and n = 2 (the SSD signal).Comment: 37 pages, 5 figures; published in JHE
Cosmological constant, near brane behavior and singularities

We show that the classical cosmological constant in type II flux compactifications can be written as a sum of terms from the action of localized sources plus a specific contribution from non-trivial background fluxes. Exploiting two global scaling symmetries of the classical supergravity action, we find that the flux contribution can in many interesting cases be set to zero such that the cosmological constant is fully determined by the boundary conditions of the fields in the near-source region. This generalizes and makes more explicit previous arguments in the literature. We then discuss the problem of putting D3-branes at the tip of the Klebanov-Strassler throat glued to a compact space in type IIB string theory so as to engineer a de Sitter solution. Our result for the cosmological constant and a simple global argument indicate that inserting a fully localized and backreacting (D3) over bar -brane into such a background yields a singular energy density for the NSNS and RR 3-form field strengths at the (D3) over bar -brane. This argument does not rely on partial smearing of the (D3) over bar -brane or a linearization of field equations, but on a few general assumptions that we also discuss carefully