pinecone/core-2020-05-10-deduplication huggingface dataset:
Muon anomalous magnetic moment and positron excess at AMS-02 in a gauged
  horizontal symmetric model

We studied an extension of the standard model with a fourth generation of
fermions to explain the discrepancy in the muon $(g-2)$ and explain the
positron excess seen in the AMS-02 experiment. We introduce a gauged
$SU(2)_{HV}$ horizontal symmetry between the muon and the 4th generation lepton
families. The 4th generation right-handed neutrino is identified as the dark
matter with mass $\sim 700$ GeV. The dark matter annihilates only to $(\mu^+
\mu^-)$ and $(\nu^c_\mu ~\nu_\mu)$ states via $SU(2)_{HV}$ gauge boson. The
$SU(2)_{HV}$ gauge boson with mass $\sim 1.4$ TeV gives an adequate
contribution to the $(g-2)$ of muon and fulfill the experimental constraint
from BNL measurement. The higgs production constraints from 4th generation
fermions is evaded by extending the higgs sector.Comment: Journal version, to appear in JHE
Supersymmetric counterterms from new minimal supergravity

We present a systematic classification of counterterms of four-dimensional supersymmetric field theories on curved space, obtained as the rigid limit of new minimal supergravity. These are supergravity invariants constructed using the field theory background fields. We demonstrate that if the background preserves two supercharges of opposite chirality, then all dimensionless counterterms vanish, implying that in this case the supersymmetric partition function is free of ambiguities. When only one Euclidean supercharge is preserved, we describe the ambiguities that appear in the partition function, in particular in the dependence on marginal couplings
Attractive holographic $c$-functions

Using the attractor mechanism for extremal solutions in ${\cal N}=2$ gauged
supergravity, we construct a $c$-function that interpolates between the central
charges of theories at ultraviolet and infrared conformal fixed points
corresponding to anti-de Sitter geometries. The $c$-function we obtain is
couched purely in terms of bulk quantities and connects two different
dimensional CFTs at the stable conformal fixed points under the RG flow.Comment: 13 pages, revised references and typographic modification
Minimal modifications to the Tri-Bimaximal neutrino mixing

In light of the observation of a relatively large θ 13 , the ever popular Tri-Bimaximal (TBM) neutrino mixing which predicts a vanishing θ 13 needs modifications. In this paper, we shall discuss the possibility of modifying it in a minimal way to fulfil this task. In the first part, a neutrino mass matrix with three independent parameters, which leads to the TM2 mixing, is obtained by analogy with that for the TBM mixing. In the second part, a model that can realize the TM2 mixing is constructed with flavor symmetries A 4 × U(1) × Z 2 × Z 2 × Z 2 . It is the variant of a model that gives the TBM mixing, with only one more flavon field included. Furthermore, the imaginary vacuum expectation value (VEV) of this flavon breaks the imposed CP symmetry and results in θ 23 = 45° and the maximal CP violation. Besides, this model building approach can be generalized to the TM1 mixing in a straightforward way
A gravitational wave background from the decay of the standard model Higgs after inflation

The stability of the Standard Model (SM) at high energies implies that the SM Higgs forms a condensate during inflation, which starts oscillating soon after the inflationary stage ends. This causes the Higgs to decay very fast, via non-perturbative effects, into all the SM fields coupled directly to it. The excited species act as a source of gravitational waves (GWs), and as a result, all Yukawa and SU(2) L gauge couplings of the SM are imprinted as features in the GW spectrum. In practice, the signal is dominated by the most strongly interacting species, rendering the information on the other species inaccessible. To detect this background new high frequency GW detection technology is required, beyond that of currently planned detectors. If detected, this signal could be used for measuring properties of high-energy particle physics, including beyond the SM scenarios
Higgs Mixing in the NMSSM and Light Higgsinos

We explore the effects of Higgs mixing in the general next-to-minimal
supersymmetric Standard Model (NMSSM). Extended to include a gauge singlet, the
Higgs sector can naturally explain the observed Higgs boson mass in TeV scale
supersymmetry without invoking large stop mixing. This is particularly the case
when the singlet scalar is light so that singlet-doublet mixing increases the
mass of the SM-like Higgs boson. In such a case the Higgs mixing has
interesting implications following from the fact that the higgsino mass
parameter and the singlet coupling to Higgs bilinear crucially depend on the
Higgs boson masses and mixing angles. For the mixing compatible with the
current LHC data on the Higgs signal rates, the higgsinos are required to be
relatively light, around or below a few hundred GeV, as long as the heavy
doublet Higgs boson has a mass smaller than about 250\sqrt{\tan\beta} GeV and
the singlet-like Higgs boson is consistent with the LEP constraint. In
addition, the Higgs coupling to photons can receive a sizable contribution of
either sign from the charged-higgsino loops combined with singlet-doublet
mixing.Comment: 26 pages, 5 figures, Higgs data updated, discussion extended, typos
  fixed, to appear in JHE
A Refined Holographic QCD Model and QCD Phase Structure

We consider the Einstein-Maxwell-dilaton system with an arbitrary kinetic
gauge function and a dilaton potential. A family of analytic solutions is
obtained by the potential reconstruction method. We then study its holographic
dual QCD model. The kinetic gauge function can be fixed by requesting the
linear Regge spectrum of mesons. We calculate the free energy to obtain the
phase diagram of the holographic QCD model.Comment: 21 pages, 17 figures. arXiv admin note: substantial text overlap with
  arXiv:1301.038
Electromagnetic response of strongly coupled plasmas

We present a thorough analysis of the electromagnetic response of strongly
coupled neutral plasmas described by the gauge/gravity correspondence. The
coupling of the external electromagnetic field with the tower of quasi-normal
modes of the plasmas supports the presence of various electromagnetic modes
with different properties. Among them we underline the existence of negative
refraction with low dissipation for a transverse non-hydrodynamical mode.
Previous hydrodynamical approaches have shown the ubiquitous character of
negative refraction in charged plasmas and the absence thereof in neutral
plasmas. Our results here extend the analysis for neutral plasmas beyond the
hydrodynamical regime. As an application of these new insights we briefly
discuss the case of the quark gluon plasma in the temperature dominated regime.Comment: 29 pages, 15 figure
Comments on M$_{24}$ representations and $CY_3$ geometries

We show using string dualities that Mathieu moonshine controls Gromov-Witten
invariants and periods of the holomorphic 3-form $\Omega$ for certain $CY_3$
manifolds. We also discuss how the period vectors appear in flux
compactifications on these $CY_3$ manifolds and work out the connection between
the sporadic group M$_{24}$ and the Yukawa couplings in four dimensional
theories that arise from heterotic string theory compactifications on these
$CY_3$ manifolds.Comment: 27 pages, v2: minor additions, published versio
Compact Formulas for the Completed Mock Modular Forms

In this paper we present a new compact expression of the elliptic genus of
SL(2)/U(1)-supercoset theory by making use of the `spectral flow method' of the
path-integral evaluation. This new expression is written in a form like a
Poincare series with a non-holomorphic Gaussian damping factor, and manifestly
shows the modular and spectral flow properties of a real analytic Jacobi form.
As a related problem, we present similar compact formulas for the modular
completions of various mock modular forms which appear in the representation
theory of N=2,4 superconformal algebras.
  We further discuss the generalization to the cases of arbitrary
spin-structures, that is, the world-sheet fermions with twisted boundary
conditions parameterized by a continuous parameter. This parameter is naturally
identified with the `u-variable' in the Appell-Lerch sum.Comment: 1+31 pages, no figure; v2 minor corrections, typos corrected, version
  to appear in JHE
Exploring MSSM for Charge and Color Breaking and Other Constraints in
  the Context of Higgs@125 GeV

Exploring MSSM parameter space after the discovery of Higgs Boson with mass
125 GeV naturally demands large top-squark mixing or large trilinear coupling
parameter $A_t$ in particular, so as to avoid excessively heavy squark,
specially for the universal models like CMSSM. We study stability of
electroweak symmetry breaking vacua in possible presence of deeper charge-color
symmetry breaking minima within MSSM. Besides stable vacua, we consider
scenarios characterized by the presence of global CCB minima, with SM like
charge and color conserving vacuum, having stability over cosmologically large
lifetime {(\it long-lived states)}. We allow vacuum expectation values for both
stop as well as sbottom fields, since these belong to the third generation of
sfermions with larger Yukawa couplings that have immediate effect on the
tunneling time. Moreover, for large $\mu$ regions, radiative corrections to
Higgs boson mass from bottom-squark loop is quite significant. Regions of MSSM
parameters space become viable for large $A_t$ and large $\mu$ zones which are
generically excluded via the traditional analytical CCB constraints. For a
large value of $\tan\beta$, safe vacua associated with large values of $|\mu|$
and $|A_t|$ are predominantly long-lived and may be associated with relatively
light stop masses. We also identify low $\mu$ regions associated with
long-lived states. Both the above zones can be friendly to muon $g-2$
constraint. We also impose constraints from ${\rm Br}(B \rightarrow X_s
\gamma)$ and ${\rm Br}(B_s \rightarrow \mu^+ \mu^-)$. We do the analysis for a
moderate and a large $\tan\beta$. Results are compatible with dark matter
related constraints, as expected.Comment: 29 pages, pdfLaTex. Rechecked the long-lived states for accuracy with
  no essential change in results. Conclusion unchange
Alpha- and Omega-Deformations from fluxes in M-Theory

We discuss an SL(2,R) family of deformed N=2 four-dimensional gauge theories
which we derive from a flux background in M-theory. In addition to the
Omega-deformation this family includes a new deformation, which we call the
Alpha-deformation, which can be viewed as an S-dual to the Omega-deformation.
We study these gauge theories in two ways: by constructing a non-Abelian (but
UV-complete) Lagrangian, and by their strong coupling lift to M-theory where
their low-energy dynamics can be determined by examining the equation of motion
of a single M5-brane wrapped on a Riemann surface.Comment: 25 pages. Typos corrected. Reference added. JHEP versio
Partition Functions of Superconformal Chern-Simons Theories from Fermi
  Gas Approach

We study the partition function of three-dimensional ${\mathcal N}=4$
superconformal Chern-Simons theories of the circular quiver type, which are
natural generalizations of the ABJM theory, the worldvolume theory of
M2-branes. In the ABJM case, it was known that the perturbative part of the
partition function sums up to the Airy function as
$Z(N)=e^{A}C^{-1/3}\mathrm{Ai}[C^{-1/3}(N-B)]$ with coefficients $C$, $B$ and
$A$ and that for the non-perturbative part the divergences coming from the
coefficients of worldsheet instantons and membrane instantons cancel among
themselves. We find that many of the interesting properties in the ABJM theory
are extended to the general superconformal Chern-Simons theories. Especially,
we find an explicit expression of $B$ for general ${\mathcal N}=4$ theories, a
conjectural form of $A$ for a special class of theories, and cancellation in
the non-perturbative coefficients for the simplest theory next to the ABJM
theory.Comment: 36 pages, 4 figures; v2: typos corrected and clarifications adde
On classical and semiclassical properties of the Liouville theory with
  defects

The Lagrangian of the Liouville theory with topological defects is analyzed
in detail and general solution of the corresponding defect equations of motion
is found. We study the heavy and light semiclassical limits of the defect
two-point function found before via the bootstrap program. We show that the
heavy asymptotic limit is given by the exponential of the Liouville action with
defects, evaluated on the solutions with two singular points. We demonstrate
that the light asymptotic limit is given by the finite dimensional path
integral over solutions of the defect equations of motion with a vanishing
energy-momentum tensor.Comment: 50 pages, typos corrected, references added, comments and
  explanations adde
Numerical corrections to the strong coupling effective Polyakov-line action for finite T Yang-Mills theory

We consider a three-dimensional effective theory of Polyakov lines derived previously from lattice Yang-Mills theory and QCD by means of a resummed strong coupling expansion. The effective theory is useful for investigations of the phase structure, with a sign problem mild enough to allow simulations also at finite density. In this work we present a numerical method to determine improved values for the effective couplings directly from correlators of 4d Yang-Mills theory. For values of the gauge coupling up to the vicinity of the phase transition, the dominant short range effective coupling are well described by their corresponding strong coupling series. We provide numerical results also for the longer range interactions, Polyakov lines in higher representations as well as four-point interactions, and discuss the growing significance of non-local contributions as the lattice gets finer. Within this approach the critical Yang-Mills coupling β c is reproduced to better than one percent from a one-coupling effective theory on N τ = 4 lattices while up to five couplings are needed on N τ = 8 for the same accuracy
Grand Unification in the Spectral Pati-Salam Model

We analyze the running at one-loop of the gauge couplings in the spectral
Pati-Salam model that was derived in the framework of noncommutative geometry.
There are a few different scenario's for the scalar particle content which are
determined by the precise form of the Dirac operator for the finite
noncommutative space. We consider these different scenarios and establish for
all of them unification of the Pati-Salam gauge couplings. The boundary
conditions are set by the usual RG flow for the Standard Model couplings at an
intermediate mass scale at which the Pati-Salam symmetry is broken.Comment: 8 page
Dark sector impact on gravitational collapse of an electrically charged
  scalar field

Dark matter and dark energy are dominating components of the Universe. Their
presence affects the course and results of processes, which are driven by the
gravitational interaction. The objective of the paper was to examine the
influence of the dark sector on the gravitational collapse of an electrically
charged scalar field. A phantom scalar field was used as a model of dark energy
in the system. Dark matter was modeled by a complex scalar field with a quartic
potential, charged under a U(1)-gauge field. The dark components were coupled
to the electrically charged scalar field via the exponential coupling and the
gauge field-Maxwell field kinetic mixing, respectively. Complete non-linear
simulations of the investigated process were performed. They were conducted
from regular initial data to the end state, which was the matter dispersal or a
singularity formation in a spacetime. During the collapse in the presence of
dark energy dynamical wormholes and naked singularities were formed in emerging
spacetimes. The wormhole throats were stabilized by the violation of the null
energy condition, which occurred due to a significant increase of a value of
the phantom scalar field function in its vicinity. The square of mass parameter
of the dark matter scalar field potential controlled the formation of a Cauchy
horizon or wormhole throats in the spacetime. The joint impact of dark energy
and dark matter on the examined process indicated that the former decides what
type of an object forms, while the latter controls the amount of time needed
for the object to form. Additionally, the dark sector suppresses the natural
tendency of an electrically charged scalar field to form a dynamical
Reissner-Nordstr\"om spacetime during the gravitational collapse.Comment: 46 pages, 28 figure
Supersymmetric branes on curved spaces and fluxes

We discuss general supersymmetric brane configurations in flux backgrounds of
string and M-theory and derive a necessary condition for the worldvolume theory
to be supersymmetric on a given curved manifold. This condition resembles very
much the conditions found from coupling a supersymmetric field theory to
off-shell supergravity but can be derived in any dimension and for up to
sixteen supercharges. Apart from the topological twist, all couplings appearing
in the supersymmetry condition are linked to fluxes in the bulk. We explicitly
derive the condition for D3-, M2- and M5-branes, in which case the results are
also useful for constructing holographic duals to the corresponding field
theories. In $N=1$ setups we compare the supersymmetry conditions to those that
arise by coupling the field theory to off-shell supergravity. We find that the
couplings of both old and new minimal supergravity are simultaneously realized,
indicating that off-shell supergravity should be coupled via the S-multiplet of
16/16 supergravity in order to describe all supersymmetric brane theories on
curved spaces.Comment: 18 pages; v2: Added discussion refering to 16/16 supergravity for the
  N=1 case and added reference
Radiative Corrections to Light Neutrino Masses in Low Scale Type I Seesaw Scenarios and Neutrinoless Double Beta Decay

We perform a detailed analysis of the one-loop corrections to the light neutrino mass matrix within low scale type I seesaw extensions of the Standard Model and their implications in experimental searches for neutrinoless double beta decay. We show that a sizable contribution to the effective Majorana neutrino mass from the exchange of heavy Majorana neutrinos is always possible, provided one requires a fine-tuned cancellation between the tree-level and one-loop contribution to the light neutrino masses. We quantify the level of fine-tuning as a function of the seesaw parameters and introduce a generalisation of the Casas-Ibarra parametrization of the neutrino Yukawa matrix, which easily allows to include the one-loop corrections to the light neutrino masses. © 2015, The Author(s)
Exceptional geometry and Borcherds superalgebras

We study generalized diffeomorphisms in exceptional geometry with U-duality
group E_{n(n)} from an algebraic point of view. By extending the Lie algebra
e_n to an infinite-dimensional Borcherds superalgebra, involving also the
extension to e_{n+1}, the generalized Lie derivatives can be expressed in a
simple way, and the expressions take the same form for any n less than 8. The
closure of the transformations then follows from the Jacobi identity and the
grading of e_{n+1} with respect to e_n.Comment: 19 pages. v2: Changes in the part of section 3.3 about generalized
  Jordan triple systems. v3: Typos corrected. Published version. v4:
  Infinitesimal change
$K^+\to\pi^+\nu\bar\nu$ and $K_L\to\pi^0\nu\bar\nu$ in the Standard
  Model: Status and Perspectives

In view of the recent start of the NA62 experiment at CERN that is expected
to measure the $K^+\to\pi^+\nu\bar\nu$ branching ratio with a precision of 10%,
we summarise the present status of this promising decay within the Standard
Model (SM). We do likewise for the closely related $K_L\to\pi^0\nu\bar\nu$,
which will be measured by the KOTO experiment around 2020. As the perturbative
QCD and electroweak corrections in both decays are under full control, the
dominant uncertainties within the SM presently originate from the CKM
parameters $V_{cb}$, $V_{ub}$ and $\gamma$. We show this dependence with the
help of analytic expressions as well as accurate interpolating formulae.
Unfortunately a clarification of the discrepancies between inclusive and
exclusive determinations of $V_{cb}$ and $V_{ub}$ from tree-level decays will
likely require results from the Belle II experiment available at the end of
this decade. Thus we investigate whether higher precision on both branching
ratios is achievable by determining $V_{cb}$, $V_{ub}$ and $\gamma$ by means of
other observables that are already precisely measured. In this context
$\varepsilon_K$ and $\Delta M_{s,d}$, together with the expected progress in
QCD lattice calculations will play a prominent role. We find
$\mathcal{B}(K^+\to\pi^+\nu\bar\nu) = (9.11\pm 0.72) \times 10^{-11}$ and
$\mathcal{B}(K_L\to\pi^0\nu\bar\nu) = (3.00\pm 0.30) \times 10^{-11}$, which is
more precise than using averages of the present tree-level values of $V_{cb}$,
$V_{ub}$ and $\gamma$. Furthermore, we point out the correlation between
$\mathcal{B}(K^+\to\pi^+\nu\bar\nu)$,
$\overline{\mathcal{B}}(B_s\to\mu^+\mu^-)$ and $\gamma$ within the SM, that is
only very weakly dependent on other CKM parameters. Finally, we also update the
ratio $\varepsilon'/\varepsilon$ in the SM and present its correlation with
$K_L\to\pi^0\nu\bar\nu$.Comment: 33 pages, 8 figures, 5 tables; v2: new correlation presented and
  discussion extended in section 3.2, analysis in section 5 updated, typos
  corrected; matches version published in JHE
All gaugings and stable de Sitter in D = 7 half-maximal supergravity

We study the general formulation of gauged supergravity in seven dimensions with sixteen supercharges keeping duality covariance by means of the embedding tensor formalism. We first classify all inequivalent duality orbits of consistent deformations. Secondly, we analyse the complete set of critical points in a systematic way. Interestingly, we find the first examples of stable de Sitter solutions within a theory with such a large amount of supersymmetry.Fil: Dibitetto, Giuseppe. University of Uppsala; SueciaFil: Fernandez Melgarejo, Jose J.. Harvard University; Estados UnidosFil: Marques, Diego. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentin
The impact of sterile neutrinos on CP measurements at long baselines

With the Deep Underground Neutrino Experiment (DUNE) as an example, we show
that the presence of even one sterile neutrino of mass $\sim$1 eV can
significantly impact the measurements of CP violation in long baseline
experiments. Using a probability level analysis and neutrino-antineutrino
asymmetry calculations, we discuss the large magnitude of these effects, and
show how they translate into significant event rate deviations at DUNE. Our
results demonstrate that measurements which, when interpreted in the context of
the standard three family paradigm, indicate CP conservation at long baselines,
may, in fact hide large CP violation if there is a sterile state. Similarly,
any data indicating the violation of CP cannot be properly interpreted within
the standard paradigm unless the presence of sterile states of mass O(1 eV) can
be conclusively ruled out. Our work underscores the need for a parallel and
linked short baseline oscillation program and a highly capable near detector
for DUNE, in order that its highly anticipated results on CP violation in the
lepton sector may be correctly interpreted.Comment: Published in Journal of High Energy Physics, Volume 2015, Issue 1