pinecone/core-2020-05-10-deduplication huggingface dataset:
Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at √s=13 TeV

A search for a new scalar resonance decaying to a pair of Z bosons is performed in the mass range from 130 GeV to 3 TeV, and for various width scenarios. The analysis is based on proton-proton collisions recorded by the CMS experiment at the LHC in 2016, corresponding to an integrated luminosity of 35.9 fb⁻¹ at a center-of-mass energy of 13 TeV. The Z boson pair decays are reconstructed using the 4ℓ, 2ℓ2q, and 2ℓ2ν final states, where ℓ = e or μ. Both gluon fusion and electroweak production of the scalar resonance are considered, with a free parameter describing their relative cross sections. A dedicated categorization of events, based on the kinematic properties of associated jets, and matrix element techniques are employed for an optimal signal and background separation. A description of the interference between signal and background amplitudes for a resonance of an arbitrary width is included. No significant excess of events with respect to the standard model expectation is observed and limits are set on the product of the cross section for a new scalar boson and the branching fraction for its decay to ZZ for a large range of masses and widths. Keywords: Hadron-Hadron scattering (experiments); Higgs physic
The reflection coefficient for minimal model conformal defects from
  perturbation theory

We consider a class of conformal defects in Virasoro minimal models that have
been defined as fixed points of the renormalisation group and calculate the
leading contribution to the reflection coefficient for these defects. This
requires several structure constants of the operator algebra of the defect
fields, for which we present a derivation in detail. We compare our results
with our recent work on conformal defects in the tricritical Ising model.Comment: 22 pages; v2: minor changes, defect field transformation law
  clarified, reference adde
Final results of the search for νμ → νe oscillations with the OPERA detector in the CNGS beam

The OPERA experiment has discovered the tau neutrino appearance in the CNGS muon neutrino beam, in agreement with the 3 neutrino flavour oscillation hypothesis. The OPERA neutrino interaction target, made of Emulsion Cloud Chambers, was particularly efficient in the reconstruction of electromagnetic showers. Moreover, thanks to the very high granularity of the emulsion films, showers induced by electrons can be distinguished from those induced by π0s, thus allowing the detection of charged current interactions of electron neutrinos. In this paper the results of the search for electron neutrino events using the full dataset are reported. An improved method for the electron neutrino energy estimation is exploited. Data are compatible with the 3 neutrino flavour mixing model expectations and are used to set limits on the oscillation parameters of the 3+1 neutrino mixing model, in which an additional mass eigenstate m4 is introduced. At high Δm_{;41};^{;2}; (≳0.1 eV^{;2};), an upper limit on sin^{;2};(2θμe) is set to 0.021 at 90% C.L. and Δm_{;41};^{;2}; ≳ 4 × 10^{;− 3}; eV^{;2}; is excluded for maximal mixing in appearance mode
RG flows with supersymmetry enhancement and geometric engineering

In this paper we study a class of $\mathcal{N}=2$ SCFTs with ADE global
symmetry defined via Type IIB compactification on a class of hypersurfaces in
$\mathbb{C}^3\times\mathbb{C}^*$. These can also be constructed by
compactifying the 6d (2,0) theory of type ADE on a sphere with an irregular and
a full punctures. When we couple to the ADE moment map a chiral multiplet in
the adjoint representation and turn on a (principal) nilpotent vev for it, all
the theories in this family display enhancement of supersymmetry in the
infrared. We observe that all known examples of lagrangian theories which flow,
upon the same type of deformation, to strongly coupled $\mathcal{N}=2$ theories
fit naturally in our framework, thus providing a new perspective on this topic.
We propose an infrared equivalence between this RG flow and a manifestly
$\mathcal{N}=2$ preserving one and, as a byproduct, we extract a precise
prescription to relate the SW curves describing the UV and IR fixed points for
all theories with A or D global symmetry. We also find, for a certain subclass,
a simple relation between UV and IR theories at the level of chiral algebras.Comment: clarifications added, version published in JHE
Probing Fuzzballs with Particles, Waves and Strings

We probe D1D5 micro-state geometries with massless particles, waves and
strings. To this end, we study geodetic motion, Klein-Gordon equation and
string scattering in the resulting gravitational background. Due to the reduced
rotational symmetry, even in the simple case of a circular fuzzball, the system
cannot be integrated elementarily. Yet, for motion in the plane of the string
profile or in the orthogonal plane to it, one can compute the deflection angle
or the phase shift and identify the critical impact parameter, at which even a
massless probe is captured by the fuzzball if its internal momentum is properly
tuned. We find agreement among the three approaches, thus giving further
support to the fuzzball proposal at the dynamical level.Comment: 35 pages. Extended and improved discussions on the integrability of
  the geodetic equations and on the critical impact parameter
Solving M-theory with the Conformal Bootstrap

We use the conformal bootstrap to perform a precision study of 3d maximally
supersymmetric ($\mathcal{N}=8$) SCFTs that describe the IR physics on $N$
coincident M2-branes placed either in flat space or at a $\C^4/\Z_2$
singularity. First, using the explicit Lagrangians of ABJ(M)
\cite{Aharony:2008ug,Aharony:2008gk} and recent supersymmetric localization
results, we calculate certain half and quarter-BPS OPE coefficients, both
exactly at small $N$, and approximately in a large $N$ expansion that we
perform to all orders in $1/N$. Comparing these values with the numerical
bootstrap bounds leads us to conjecture that some of these theories obey an OPE
coefficient minimization principle. We then use this conjecture as well as the
extremal functional method to reconstruct the first few low-lying scaling
dimensions and OPE coefficients for both protected and unprotected multiplets
that appear in the OPE of two stress tensor multiplets for all values of $N$.
We also calculate the half and quarter-BPS operator OPE coefficients in the
$SU(2)_k \times SU(2)_{-k}$ BLG theory for all values of the Chern-Simons
coupling $k$, and show that generically they do not obey the same OPE
coefficient minimization principle.Comment: 30 pages, 5 figures, v2 submitted for publicatio
A matrix CFT at multiple large charges

We investigate matrix models in three dimensions where the global
$\text{SU}(N)$ symmetry acts via the adjoint map. Analyzing their ground state
which is homogeneous in space and can carry either a unique or multiple fixed
charges, we show the existence of at least two distinct fixed points of the
renormalization group (RG) flow. In particular, the one type of those fixed
points manifests itself via tractable deviations in the large-charge expansion
from the known predictions in the literature. We demonstrate most of the novel
features using mainly the example of the $\text{SU}(4)$ matrix theory to
compute the anomalous dimension of the lowest scalar operator with large global
charge(s).Comment: 1+36 pages, 2 figures, minor clarifications added, version to be
  published in JHE
Flavoured soft leptogenesis and natural values of the B term

We revisit flavour effects in soft leptogenesis relaxing the assumption of
universality for the soft supersymmetry breaking terms. We find that with
respect to the case in which the heavy sneutrinos decay with equal rates and
equal CP asymmetries for all lepton flavours, hierarchical flavour
configurations can enhance the efficiency by more than two orders of magnitude.
This translates in more than three order of magnitude with respect to the
one-flavour approximation. We verify that lepton flavour equilibration effects
related to off-diagonal soft slepton masses are ineffective for damping these
large enhancements. We show that soft leptogenesis can be successful for
unusual values of the relevant parameters, allowing for $B\sim {\cal O}({\rm
TeV})$ and for values of the washout parameter up to $m_{\rm eff}/m_* \sim
5\times 10^{3}$.Comment: 23 pages, 5 figures postscript, Minor changes to match the published
  version in JHE
Discrete R Symmetries and Domain Walls

Discrete R symmetries are interesting from a variety of points of view. They
raise the specter, however, of domain walls, which may be cosmologically
problematic. In this note, we describe some of the issues. In many schemes for
supersymmetry breaking, as we explain, satisfying familiar constraints such as
suppression of gravitino production, insures that the domain walls are readily
inflated away. However, in others, they form after inflation. In these cases,
it is necessary that they annihilate. We discuss possible breaking mechanisms
for the discrete symmetries, and the constraints they must satisfy so that the
walls annihilate effectively.Comment: 13 page
Spinor-Vector Duality in Heterotic String Orbifolds

The three generation heterotic-string models in the free fermionic
formulation are among the most realistic string vacua constructed to date,
which motivated their detailed investigation. The classification of free
fermion heterotic string vacua has revealed a duality under the exchange of
spinor and vector representations of the SO(10) GUT symmetry over the space of
models. We demonstrate the existence of the spinor-vector duality using
orbifold techniques, and elaborate on the relation of these vacua to free
fermionic models.Comment: 20 pages. v2 minor corrections. Version to appear on JHEP. v3
  misprints correcte
Simultaneous Extraction of the Fermi constant and PMNS matrix elements
  in the presence of a fourth generation

Several recent studies performed on constraints of a fourth generation of
quarks and leptons suffer from the ad-hoc assumption that 3 x 3 unitarity holds
for the first three generations in the neutrino sector. Only under this
assumption one is able to determine the Fermi constant G_F from the muon
lifetime measurement with the claimed precision of G_F = 1.16637 (1) x 10^-5
GeV^-2. We study how well G_F can be extracted within the framework of four
generations from leptonic and radiative mu and tau decays, as well as from K_l3
decays and leptonic decays of charged pions, and we discuss the role of lepton
universality tests in this context. We emphasize that constraints on a fourth
generation from quark and lepton flavour observables and from electroweak
precision observables can only be obtained in a consistent way if these three
sectors are considered simultaneously. In the combined fit to leptonic and
radiative mu and tau decays, K_l3 decays and leptonic decays of charged pions
we find a p-value of 2.6% for the fourth generation matrix element |U_{e 4}|=0
of the neutrino mixing matrix.Comment: 19 pages, 3 figures with 16 subfigures, references and text added
  refering to earlier related work, figures and text in discussion section
  added, results and conclusions unchange
Gauge fields on noncommutative geometries with curvature

It was shown recently that the lagrangian of the Grosse-Wulkenhaar model can
be written as lagrangian of the scalar field propagating in a curved
noncommutative space. In this interpretation, renormalizability of the model is
related to the interaction with the background curvature which introduces
explicit coordinate dependence in the action. In this paper we construct the
$U_1$ gauge field on the same noncommutative space: since covariant derivatives
contain coordinates, the Yang-Mills action is again coordinate dependent. To
obtain a two-dimensional model we reduce to a subspace, which results in
splitting of the degrees of freedom into a gauge and a scalar. We define the
gauge fixing and show the BRST invariance of the quantum action.Comment: 18 page
Heterotic Black Horizons

We show that the supersymmetric near horizon geometry of heterotic black
holes is either an AdS_3 fibration over a 7-dimensional manifold which admits a
G_2 structure compatible with a connection with skew-symmetric torsion, or it
is a product R^{1,1} * S^8, where S^8 is a holonomy Spin(7) manifold,
preserving 2 and 1 supersymmetries respectively. Moreover, we demonstrate that
the AdS_3 class of heterotic horizons can preserve 4, 6 and 8 supersymmetries
provided that the geometry of the base space is further restricted. Similarly
R^{1,1} * S^8 horizons with extended supersymmetry are products of R^{1,1} with
special holonomy manifolds. We have also found that the heterotic horizons with
8 supersymmetries are locally isometric to AdS_3 * S^3 * T^4, AdS_3 * S^3 * K_3
or R^{1,1} * T^4 * K_3, where the radii of AdS_3 and S^3 are equal and the
dilaton is constant.Comment: 35 pages, latex. Minor alterations to equation (3.11) and section
  4.1, the conclusions are not affecte
Logarithmic correction to BH entropy as Noether charge

We consider the role of the type-A trace anomaly in static black hole
solutions to semiclassical Einstein equation in four dimensions. Via Wald's
Noether charge formalism, we compute the contribution to the entropy coming
from the anomaly induced effective action and unveil a logarithmic correction
to the Bekenstein-Hawking area law.
  The corrected entropy is given by a seemingly universal formula involving the
coefficient of the type-A trace anomaly, the Euler characteristic of the
horizon and the value at the horizon of the solution to the uniformization
problem for Q-curvature. Two instances are examined in detail: Schwarzschild
and a four-dimensional massless topological black hole. We also find agreement
with the logarithmic correction due to one-loop contribution of conformal
fields in the Schwarzschild background.Comment: 14 pages, JHEP styl
CDMS II result and Light Higgs Boson Scenario of the MSSM

The CDMS Collaboration has reported two candidate events for dark matter. If
the events are due to the elastic scattering of dark matter, the dark matter
would be a WIMP dark matter with its mass of the order of 10-100GeV and its
scattering cross section with a nucleon is about 10^-43cm^2. We show that such
a dark matter is properly realized as a neutralino dark matter in the light
higgs boson scenario of the MSSM. The lightest higgs boson mass can be lighter
than 114.4GeV in the scenario because of a suppressed interaction between higgs
boson and Z bosons. As a result, a large scattering cross section between the
dark matter and ordinary matter is obtained.Comment: 9 pages, 5 figures, corrected figures, conclusion unchanged, XENON100
  bound superimposed, higher resolution figures can be seen on JHE
Lessons from the decoupling limit of Horava gravity

We consider the so-called "healthy" extension of Horava gravity in the limit
where the Stuckelberg field decouples from the graviton. We verify the alleged
strong coupling problem in this limit, under the assumption that no large
dimensionless parameters are put in by hand. This follows from the fact that
the dispersion relation for the Stuckelberg field does not have the desired z =
3 anisotropic scaling in the UV. To get the desired scaling and avoid strong
coupling one has to introduce a low scale of Lorentz violation and retain some
coupling between the graviton and the Stuckelberg field. We also make use of
the foliation preserving symmetry to show how the Stuckelberg field couples to
some violation of energy conservation. We source the Stuckelberg field using a
point particle with a slowly varying mass and show that two such particles feel
a constant attractive force. In this particular example, we see no Vainshtein
effect, and violations of the Equivalence Principle. The latter is probably
generic to other types of source and could potentially be used to place lower
bounds on the scale of Lorentz violation.Comment: 18 pages, 1 figure. Version to appear in JHEP. Conclusions with
  respect to strong coupling modified - our strong coupling analysis does not
  apply to a low scale of Lorentz violation. Expanded Equivalence Principle
  violation discussion, noting it presents a challenge to low scale Lorentz
  violation, exactly the scenario designed to cure strong coupling. Other minor
  corrections and references adde
Consistency Conditions on S-Matrix of Spin 1 Massless Particles

Motivated by new techniques in the computation of scattering amplitudes of
massless particles in four dimensions, like BCFW recursion relations, the
question of how much structure of the S-matrix can be determined from purely
S-matrix arguments has received new attention. The BCFW recursion relations for
massless particles of spin 1 and 2 imply that the whole tree-level S-matrix can
be determined in terms of three-particle amplitudes (evaluated at complex
momenta). However, the known proofs of the validity of the relations rely on
the Lagrangian of the theory, either by using Feynman diagrams explicitly or by
studying the effective theory at large complex momenta. This means that a
purely S-matrix theoretic proof of the relations is still missing. The aim of
this paper is to provide such a proof for spin 1 particles by extending the
four-particle test introduced by P. Benincasa and F. Cachazo in
arXiv:0705.4305[hep-th] to all particles. We show how n-particle tests imply
that the rational function built from the BCFW recursion relations possesses
all the correct factorization channels including holomorphic and
anti-holomorphic collinear limits. This in turn implies that they give the
correct S-matrix of the theory.Comment: 24 pages, 4 figure
Background independent action for double field theory

Double field theory describes a massless subsector of closed string theory
with both momentum and winding excitations. The gauge algebra is governed by
the Courant bracket in certain subsectors of this double field theory. We
construct the associated nonlinear background-independent action that is
T-duality invariant and realizes the Courant gauge algebra. The action is the
sum of a standard action for gravity, antisymmetric tensor, and dilaton fields
written with ordinary derivatives, a similar action for dual fields with dual
derivatives, and a mixed term that is needed for gauge invariance.Comment: 45 pages, v2: minor corrections, refs. added, to appear in JHE
Comments on Supercurrent Multiplets, Supersymmetric Field Theories and
  Supergravity

We analyze various supersymmetry multiplets containing the supercurrent and
the energy-momentum tensor. The most widely known such multiplet, the
Ferrara-Zumino (FZ) multiplet, is not always well-defined. This can happen once
Fayet-Iliopoulos (FI) terms are present or when the Kahler form of the target
space is not exact. We present a new multiplet S which always exists. This
understanding of the supersymmetry current allows us to obtain new results
about the possible IR behavior of supersymmetric theories. Next, we discuss the
coupling of rigid supersymmetric theories to supergravity. When the theory has
an FZ-multiplet or it has a global R-symmetry the standard formalism can be
used. But when this is not the case such simple gauging is impossible. Then, we
must gauge the current S. The resulting theory has, in addition to the graviton
and the gravitino, another massless chiral superfield Phi which is essential
for the consistency of the theory. Some of the moduli of various string models
play the role of Phi. Our general considerations, which are based on the
consistency of supergravity, show that such moduli cannot be easily lifted thus
leading to constraints on gravity/string models.Comment: 27 pages. v2: references added and minor changes. v3: minor changes.
  v4: minor clarification
Effects of invisible particle emission on global inclusive variables at
  hadron colliders

We examine the effects of invisible particle emission in conjunction with QCD
initial state radiation (ISR) on quantities designed to probe the mass scale of
new physics at hadron colliders, which involve longitudinal as well as
transverse final-state momenta. This is an extension of our previous treatment,
arXiv:0903.2013, of the effects of ISR on global inclusive variables. We
present resummed results on the visible invariant mass distribution and compare
them to parton-level Monte Carlo results for top quark and gluino
pair-production at the LHC. There is good agreement as long as the visible
pseudorapidity interval is large enough (eta ~ 3). The effect of invisible
particle emission is small in the case of top pair production but substantial
for gluino pair production. This is due mainly to the larger mass of the
intermediate particles in gluino decay (squarks rather than W-bosons). We also
show Monte Carlo modelling of the effects of hadronization and the underlying
event. The effect of the underlying event is large but may be approximately
universal.Comment: 22 pages, expanded sections and other minor modifications. Version
  published in JHE
Lovelock-Lifshitz Black Holes

In this paper, we investigate the existence of Lifshitz solutions in Lovelock
gravity, both in vacuum and in the presence of a massive vector field. We show
that the Lovelock terms can support the Lifshitz solution provided the
constants of the theory are suitably chosen. We obtain an exact black hole
solution with Lifshitz asymptotics of any scaling parameter $z$ in both
Gauss-Bonnet and in pure 3rd order Lovelock gravity. If matter is added in the
form of a massive vector field, we also show that Lifshitz solutions in
Lovelock gravity exist; these can be regarded as corrections to Einstein
gravity coupled to this form of matter. For this form of matter we numerically
obtain a broad range of charged black hole solutions with Lifshitz asymptotics,
for either sign of the cosmological constant. We find that these asymptotic
Lifshitz solutions are more sensitive to corrections induced by Lovelock
gravity than are their asymptotic AdS counterparts. We also consider the
thermodynamics of the black hole solutions and show that the temperature of
large black holes with curved horizons is proportional to $r_0^z$ where $z$ is
the critical exponent; this relationship holds for black branes of any size. As
is the case for asymptotic AdS black holes, we find that an extreme black hole
exists only for the case of horizons with negative curvature. We also find that
these Lovelock-Lifshitz black holes have no unstable phase, in contrast to the
Lovelock-AdS case. We also present a class of rotating Lovelock-Lifshitz black
holes with Ricci-flat horizons.Comment: 26 pages, 10 figures, a few references added, typo fixed and some
  comments have been adde
Properties of the general NHDM. II. Higgs potential and its symmetries

We continue our analysis of the general N-Higgs-doublet model and focus of
the Higgs potential description in the space of gauge orbits. We develop a
geometric technique that allows us to study the global minimum of the potential
without explicitly finding its position. We discuss symmetry patterns of the
NHDM potential, and illustrate the general discussion with various specific
variants of the three-Higgs-doublet model.Comment: 28 pages, 9 figures; v2: introduction rewritten, matches the
  published versio