pinecone/core-2020-05-10-deduplication huggingface dataset:
The Cremmer-Scherk Mechanism in F-theory Compactifications on K3
  Manifolds

It is well understood --- through string dualities --- that there are 20
massless vector fields in the spectrum of eight-dimensional F-theory
compactifications on smooth elliptically fibered K3 surfaces at a generic point
in the K3 moduli space. Such F-theory vacua, which do not have any enhanced
gauge symmetries, can be thought of as supersymmetric type IIB
compactifications on P1 with 24 (p,q) seven-branes. Naively, one might expect
there to be 24 massless vector fields in the eight-dimensional effective theory
coming from world-volume gauge fields of the 24 branes. In this paper, we show
how the vector field spectrum of the eight-dimensional effective theory can be
obtained from the point of view of type IIB supergravity coupled to the
world-volume theory of the seven-branes. In particular, we first show that the
two-forms of the type IIB theory absorb the seven-brane world-volume gauge
fields via the Cremmer-Scherk mechanism. We then proceed to show that the
massless vector fields of the eight-dimensional theory come from KK-reducing
the SL(2,Z) doublet two-forms of type IIB theory along SL(2,Z) doublet
one-forms on the P1. We also discuss the relation between these vector fields
and the "eaten" world-volume vector fields of the seven-branes.Comment: 33 pages + appendices, 5 figures; v2: minor corrections, reference
  adde
Improving the continuum limit of gradient flow step scaling

We introduce a non-perturbative improvement for the renormalization group
step scaling function based on the gradient flow running coupling, which may be
applied to any lattice gauge theory of interest. Considering first SU(3) gauge
theory with $N_f = 4$ massless staggered fermions, we demonstrate that this
improvement can remove $O(a^2)$ lattice artifacts, and thereby increases our
control over the continuum extrapolation. Turning to the 12-flavor system, we
observe an infrared fixed point in the infinite-volume continuum limit.
Applying our proposed improvement reinforces this conclusion by removing all
observable $O(a^2)$ effects. For the finite-volume gradient flow
renormalization scheme defined by $c = \sqrt{8t} / L = 0.2$, we find the
continuum conformal fixed point to be located at $g_\star^2 = 6.2(2)$Comment: 12 pages, 4 figures; Minor changes, published versio
Production of charm-strange hadronic molecules at the LHC

We explore the inclusive hadroproduction of the D_{s0}^*(2317), D_{s1}(2460)
and D_{sJ}(2860) states at the Large Hadron Collider under the assumption that
these hadrons are S-wave meson-meson molecules. In addition, the D_{s2}(2910),
a predicted bound state of the D_2(2460)K system, is also discussed. We first
derive a factorisation formula for the production rates based on effective
field theory. Then we make use of two MC event generators, Herwig and Pythia,
to simulate the production of pairs of charmed mesons and kaons. Using
effective field theory to handle the final state interaction among the meson
pairs, we give an estimate of the inclusive production rates for these
particles at the order-of-magnitude accuracy. Our results show that the cross
sections for the pp --> D_{s0}^*(2317) and pp --> D_{s1}(2460) at the LHC are
at O(1 \mu b) level, while the ones for the pp --> D_{sJ}(2860) and the pp -->
D_{s2}(2910) are smaller by about one order of magnitude. Such estimates
suggest that these four exotic states could be copiously produced at the LHC. A
study of these states at the LHC will thus provide valuable information on
hadron spectroscopy as well as hadron interactions.Comment: 20 pages, 4 figures, version accepted for publication in JHE
Off-Shell Scalar Supermultiplet in the Unfolded Dynamics Approach

We show how manifestly supersymmetric action for Wess-Zumino model can be
constructed within the unfolded dynamics approach. The off-shell unfolded
system for N = 1, D = 4 scalar supermultiplet is found. The action is presented
in the form of integral of a closed 4-form over any (4, 0) surface in
superspace as well as a superspace integral of an integral form or a chiral
integral form. The proposed method is argued to provide a most general tool for
the analysis of manifestly supersymmetric functionals.Comment: 32 pages, V3: references are added; introduction is extende
Classification of Boundary Gravitons in AdS$_3$ Gravity

We revisit the description of the space of asymptotically AdS3 solutions of
pure gravity in three dimensions with a negative cosmological constant as a
collection of coadjoint orbits of the Virasoro group. Each orbit corresponds to
a set of metrics related by diffeomorphisms which do not approach the identity
fast enough at the boundary. Orbits contain more than a single element and this
fact manifests the global degrees of freedom of AdS3 gravity, being each
element of an orbit what we call boundary graviton. We show how this setup
allows to learn features about the classical phase space that otherwise would
be quite difficult. Most important are the proof of energy bounds and the
characterization of boundary gravitons unrelated to BTZs and AdS3. In addition,
it makes manifest the underlying mathematical structure of the space of
solutions close to infinity. Notably, because of the existence of a symplectic
form in each orbit, being this related with the usual Dirac bracket of the
asymptotic charges, this approach is a natural starting point for the
quantization of different sectors of AdS3 gravity. We finally discuss previous
attempts to quantize coadjoint orbits of the Virasoro group and how this is
relevant for the formulation of AdS3 quantum gravity.Comment: 29 pages. Minor corrections. References added. Published version in
  JHE
Supermembrane in D=5: component action

Based on the connection between partial breaking of global supersymmetry,
coset approach, which realized the given pattern of supersymmetry breaking, and
the Nambu-Goto actions for the extended objects, we have constructed on-shell
component action for N=1, D=5 supermembrane and its dual cousins. We
demonstrate that the proper choice of the components and the use of the
covariant (with respect to broken supersymmetry) derivatives drastically
simplify the action: it can be represented as a sum of four terms each having
an explicit geometric meaning.Comment: 14 pages, PACS: 11.30.Pb, 12.60.J
Solving 2D QCD with an adjoint fermion analytically

We present an analytic approach to solving 1+1 dimensional QCD with an
adjoint Majorana fermion. In the UV this theory is described by a trivial CFT
containing free fermions. The quasi-primary operators of this CFT lead to a
discrete basis of states which is useful for diagonalizing the Hamiltonian of
the full strongly interacting theory. Working at large-$N$, we find that the
decoupling of high scaling-dimension quasi-primary operators from the
low-energy spectrum occurs exponentially fast in their scaling-dimension. This
suggests a scheme, whereby, truncating the basis to operators of dimension
below $\Delta_{max}$, one can calculate the low-energy spectrum, parametrically
to an accuracy of $e^{-\Delta_{max}}$ (although the precise accuracy depends on
the state). Choosing $\Delta_{max} =9.5$ we find very good agreement with the
known spectrum obtained earlier by numerical DLCQ methods. Specifically, below
the first three-particle threshold, we are able to identify all six
single-particle bound-states, as well as several two-particle thresholds.Comment: 26 pages, 5 figures; v2: some typos correcte
Multi-Natural Inflation in Supergravity

We show that the recently proposed multi-natural inflation can be realized
within the framework of 4D ${\cal N}=1$ supergravity. The inflaton potential
mainly consists of two sinusoidal potentials that are comparable in size, but
have different periodicity with a possible non-zero relative phase. For a
sub-Planckian decay constant, the multi-natural inflation model is reduced to
axion hilltop inflation. We show that, taking into account the effect of the
relative phase, the spectral index can be increased to give a better fit to the
Planck results, with respect to the hilltop quartic inflation. We also consider
a possible UV completion based on a string-inspired model. Interestingly, the
Hubble parameter during inflation is necessarily smaller than the gravitino
mass, avoiding possible moduli destabilization. Reheating processes as well as
non-thermal leptogenesis are also discussed.Comment: 31 pages, 6 figures. v2: version published in JHEP, references added,
  title change
Evidence for the decay $B_c^+ \rightarrow J/\psi 3\pi^+ 2\pi^-$

Evidence is presented for the decay $B_c+\rightarrow J/\psi 3\pi^+2\pi^-$ using proton-proton collision data, corresponding to an integrated luminosity of 3fb$^{-1}$, collected with the LHCb detector. A signal yield of $32\pm8$ decays is found with a significance of 4.5 standard deviations. The ratio of the branching fraction of the $B_c^+\rightarrow J/\psi 3\pi^+ 2\pi^-$ decay to that of the $B_c^+ \rightarrow J/\psi \pi^+$ decay is measured to be $$ \frac{Br (B_c^+ \rightarrow J/\psi 3\pi^+2\pi^)}{Br (B_c^+ \rightarrow J/\psi \pi^+)} = 1.74\pm0.44\pm0.24, $$ where the first uncertainty is statistical and the second is systematic
Algebraic Curve for a Cusped Wilson Line

We consider the classical limit of the recently obtained exact result for the
anomalous dimension of a cusped Wilson line with the insertion of an operator
with L units of R-charge at the cusp in planar N=4 SYM. The classical limit
requires taking both the 't Hooft coupling and L to infinity. Since the formula
for the cusp anomalous dimension involves determinants of size proportional to
L, the classical limit requires a matrix model reformulation of the result. We
construct such matrix model-like representation and find corresponding
classical algebraic curve. Using this we derive the classical value of the cusp
anomalous dimension and the 1-loop correction to it. We check our results
against the energy of the classical solution and numerically by extrapolating
from the quantum regime of finite L.Comment: 15 pages, 2 figure
Surveying the Scope of the SU(2)_L Scalar Septet Sector

Extending the Standard Model by adding a scalar field transforming as a
septet under $SU(2)_L$ preserves the $\rho$ parameter at tree level and can
satisfy experimental constraints on the electroweak parameters $S$ and $T$.
This work presents the first fully general phenomenological study of such an
extension. We examine constraints on the septet model couplings based on
electroweak and Higgs observables, and use LHC searches for new physics to
bound the mass of the septet to be above $\sim 400$ GeV at a $95\%$ CL.Comment: pdfLateX, 17 pages, 6 figures, reference added. Version published in
  JHE
The symmetry of large N=4 holography

For the proposed duality relating a family of N=4 superconformal coset models
to a certain supersymmetric higher spin theory on AdS_3, the asymptotic
symmetry algebra of the bulk description is determined. It is shown that,
depending on the choice of the boundary charges, one may obtain either the
linear or the non-linear superconformal algebra on the boundary. We compare the
non-linear version of the asymptotic symmetry algebra with the non-linear coset
algebra and find non-trivial agreement in the 't Hooft limit, thus giving
strong support for the proposed duality. As a by-product of our analysis we
also show that the W_infinity symmetry of the coset theory is broken under the
exactly marginal perturbation that preserves the N=4 superconformal algebra.Comment: 26 page
3d mirror symmetry as a canonical transformation

We generalize the free Fermi-gas formulation of certain 3d ${\cal N}=3$
supersymmetric Chern-Simons-matter theories by allowing Fayet-Iliopoulos
couplings as well as mass terms for bifundamental matter fields. The resulting
partition functions are given by simple modifications of the argument of the
Airy function found previously. With these extra parameters it is easy to see
that mirror-symmetry corresponds to linear canonical transformations on the
phase space (or operator algebra) of the 1-dimensional fermions.Comment: 11 pages, 2 figures. v2: figure added - version published in JHE
Branes are Waves and Monopoles

In a recent paper it was shown that fundamental strings are null waves in
Double Field Theory. Similarly, membranes are waves in exceptional extended
geometry. Here the story is continued by showing how various branes are
Kaluza-Klein monopoles of these higher dimensional theories. Examining the
specific case of the E7 exceptional extended geometry, we see that all branes
are both waves and monopoles. Along the way we discuss the O(d; d)
transformation of localized brane solutions not associated to an isometry and
how true T-duality emerges in Double Field Theory when the background possesses
isometries.Comment: 32 pages, Latex, v2, typos correcte
W Symmetry in six dimensions

Six-dimensional conformal field theories with $(2,0)$ supersymmetry are shown
to possess a protected sector of operators and observables that are isomorphic
to a two-dimensional chiral algebra. We argue that the chiral algebra
associated to a $(2,0)$ theory labelled by the simply-laced Lie algebra
$\mathfrak{g}$ is precisely the W algebra of type $\mathfrak{g}$, for a
specific value of the central charge. Simple examples of observables that are
made accessible by this correspondence are the three-point functions of
half-BPS operators. For the $A_n$ series, we compare our results at large $n$
to those obtained using the holographic dual description and find perfect
agreement. We further find protected chiral algebras that appear on the
worldvolumes of codimension two defects in $(2,0)$ SCFTs. This construction has
likely implications for understanding the microscopic origin of the AGT
correspondence.Comment: 34 pages. v2: minor typos corrected, final version published in JHE
Determination of the branching fractions of B-s(0) -> D-s(-/+) K--/+ and B-0 -> Ds-K+

Measurements are presented of the branching fractions of the decays B-s(0) -> D-s(-/+) K--/+ and B-0 -> Ds-K+ relative to the decays B-s(0) -> D-s(-)pi(+) and B-0 -> D-s(-)pi(+), respectively. The data used correspond to an integrated luminosity of 3.0 fb(-1) of proton-proton collisions. The ratios of branching fractions are \ud
\ud
B(B-s(0) -> D-s(-/+) K--/+)/B(B-s(0) -> D-s(-)pi(+)) = 0.0752 +/- 0.0015 +/- 0.0019 \ud
\ud
and \ud
\ud
B(B-0 -> Ds-K+)/B(B-0 -> D-pi(+)) = 0.0129 +/- 0.0005 +/- 0.0008, \ud
\ud
where the uncertainties are statistical and systematic, respectively
Towards consistent Electroweak Precision Data constraints in the SMEFT

We discuss the impact of many previously neglected effects of higher
dimensional operators when fitting to Electroweak Precision data (EWPD) in the
Standard Model Effective Field Theory (SMEFT). We calculate the general case of
$2 \rightarrow 2$ fermion scattering in the SMEFT to order
$\mathcal{O}(\bar{v}_T^2/\Lambda^2)$ valid on and off the $Z$ pole, in the
massless fermion limit. We demonstrate that previously neglected corrections
scale as $\Gamma_Z M_Z/\bar{v}_T^2$ in the partial widths extracted from
measured cross sections at LEPI, compared to the leading effect of dimension
six operators in anomalous $Z$ couplings. Further, constraints on leading
effects of anomalous $Z$ couplings are also modified by neglected perturbative
corrections and dimension eight operators. We perform a minimal EWPD fit to
illustrate the size of the error these corrections induce, when bounding
leading effects. These considerations relax bounds compared to a naive leading
order analysis, and show that constraints that rise above the percent level are
subject to substantial theoretical uncertanties. We also argue that
renormalization group running global constraints expressed through $\chi^2$
functions to a common scale, and then minimizing and performing a global fit of
all data allows more consistent constraints to be obtained in the SMEFT.Comment: 32 pg, 2 fig, Acknowledgement updated with grant numbers, typo
  correcte
Higher spin extension of cosmological spacetimes in 3D: asymptotically flat behaviour with chemical potentials and thermodynamics

A generalized set of asymptotic conditions for higher spin gravity without cosmological constant in three spacetime dimensions is constructed. They include the most general temporal components of the gauge fields that manifestly preserve the original asymptotic higher spin extension of the BMS 3 algebra, with the same central charge. By virtue of a suitable permissible gauge choice, it is shown that this set can be directly recovered as a limit of the boundary conditions that have been recently constructed in the case of negative cosmological constant, whose asymptotic symmetries are spanned by two copies of the centrally-extended W 3 algebra. Since the generalized asymptotic conditions allow to incorporate chemical potentials conjugated to the higher spin charges, a higher spin extension of locally flat cosmological spacetimes becomes naturally included within the set. It is shown that their thermodynamic properties can be successfully obtained exclusively in terms of gauge fields and the topology of the Euclidean manifold, which is shown to be the one of a solid torus, but with reversed orientation as compared with the one of black holes. It is also worth highlighting that regularity of the fields can be ensured through a procedure that does not require an explicit matrix representation of the entire gauge group. In few words, we show that the temporal components of generalized dreibeins can be consistently gauged away, which partially fixes the chemical potentials, so that the remaining conditions can just be obtained by requiring the holonomy of the generalized spin connection along a thermal circle to be trivial. The extension of the generalized asymptotically flat behaviour to the case of spins s ≥ 2 is also discussed
Multi-lepton signatures of the triplet like charged Higgs at the LHC

We study multi-lepton signatures of the triplet like charged Higgs at the LHC in the context of Y = 0 triplet extended supersymmetric model (TESSM). In TESSM the h i ± W ∓ Z coupling appears at tree level when the triplet vacuum expectation value is nonzero, and because of the coupling the charged Higgs decay channels as well as the production channels can dramatically change at the LHC. We show that for the triplet dominated charged Higgs the main production channels are no longer through the top decay or gg and gb fusions since these are very suppressed due to the lack of triplet-SM fermion coupling. In the numerical analysis, we consider also other possible production channels some of which have additional contributions from the diagrams containing h i ± W ∓ Z vertex. We investigate the decay channels of a triplet like light charged Higgs ( m h 1 ± ≤ 200 $$ {m}_{h_1^{\pm }}\le 200 $$ GeV) and show that depending on the triplet component, the charged Higgs can substantially decay to W ± Z . We further examine the 3 l , 4 l , 5 l multi-lepton signatures of the triplet like charged Higgs by considering four different benchmark points for which we perform PYTHIA level simulation using FastJet for jet formation at the LHC with 14 TeV. We found that for favorable parameters the earliest discovery with 5 σ signal significance can appear with early data of 72 fb −1 of integrated luminosity. We also present the invariant mass distribution M lljj for (≥ 3 ℓ ) + ( ≥ 30 GeV) and (≥3ℓ) + (≥2 j ) + ( ≥ 30 GeV) and show that in addition to the charged Higgs mass peak, an edge that carries information about heavy intermediate neutral Higgs bosons arises at the end of the mass distribution
Double Wick rotating Green-Schwarz strings

Via an appropriate field redefinition of the fermions, we find a set of conditions under which light cone gauge fixed world sheet theories of strings on two different backgrounds are related by a double Wick rotation. These conditions take the form of a set of transformation laws for the background fields, complementing a set of transformation laws for the metric and B field we found previously with a set for the dilaton and RR fields, and are compatible with the supergravity equations of motion. Our results prove that at least to second order in fermions, the AdS 5 × S 5 mirror model which plays an important role in the field of integrability in AdS/CFT, represents a string on ‘mirror AdS 5 × S 5 ’, the background that follows from our transformations. We discuss analogous solutions for AdS 3 × S 3 × T 4 and AdS 2 × S 2 × T 6 . The main ingredient in our derivation is the light cone gauge fixed action for a string on an (almost) completely generic background, which we explicitly derive to second order in fermions
Lepton-flavor-violating Higgs decay $h \to \mu\tau$ and muon anomalous
  magnetic moment in a general two Higgs doublet model

A two Higgs doublet model (2HDM) is one of the minimal extensions of the
Standard Model (SM), and it is well-known that the general setup predicts the
flavor-violating phenomena, mediated by neutral Higgs interactions. Recently
the CMS collaboration has reported an excess of the lepton-flavor-violating
Higgs decay in $h \rightarrow \mu \tau$ channel with a significance of 2.5 $
\sigma$. We investigate the CMS excess in a general 2HDM with tree-level Flavor
Changing Neutral Currents (FCNCs), and discuss its impact on the other physical
observations. Especially, we see that the FCNCs relevant to the excess can
enhance the neutral Higgs contributions to the muon anomalous magnetic moment,
and can resolve the discrepancy between the measured value and the SM
prediction. We also find that the couplings to be consistent with the muon g-2
anomaly as well as the CMS excess in $h\rightarrow \mu\tau$ predict the sizable
rate of $ \tau \rightarrow \mu \gamma$, which is within the reach of future B
factory.Comment: 6 pages, 3 figures, revised Fig.3, corrected Eq. (12), added
  references, accepted for publication in JHE
A Scale-invariant Higgs Sector and Structure of the Vacuum

In view of the current status of measured Higgs boson properties, we consider
a question whether only the Higgs self-interactions can deviate significantly
from the Standard-Model (SM) predictions. This may be possible if the Higgs
effective potential is irregular at the origin. As an example we investigate an
extended Higgs sector with singlet scalar(s) and classical scale invariance. We
develop a perturbative formulation necessary to analyze this model in detail.
The behavior of a phenomenologically valid potential in the perturbative regime
is studied around the electroweak scale. We reproduce known results: The Higgs
self-interactions are substantially stronger than the SM predictions, while the
Higgs interactions with other SM particles are barely changed. We further
predict that the interactions of singlet scalar(s), which is a few to several
times heavier than the Higgs boson, tend to be fairly strong. If probed, these
features will provide vivid clues to the structure of the vacuum. We also
examine Veltman's condition for the Higgs boson mass.Comment: 26 pages, 14 figures, minor modification, version to appear in JHE