pinecone/core-2020-05-10-deduplication huggingface dataset:
Search for Higgs boson pair production in the γγbb¯¯ final state with 13 TeV pp collision data collected by the ATLAS experiment

A search is performed for resonant and non-resonant Higgs boson pair production in the γγbb¯¯ final state. The data set used corresponds to an integrated luminosity of 36.1 fb−1 of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. No significant excess relative to the Standard Model expectation is observed. The observed limit on the non-resonant Higgs boson pair cross-section is 0.73 pb at 95% confidence level. This observed limit is equivalent to 22 times the predicted Standard Model cross-section. The Higgs boson self-coupling (κλ = λHHH/λ HHH SM ) is constrained at 95% confidence level to −8.2 < κλ < 13.2. For resonant Higgs boson pair production through X→HH→γγbb¯¯, the limit is presented, using the narrow-width approximation, as a function of mX in the range 260 GeV < mX < 1000 GeV. The observed limits range from 1.1 pb to 0.12 pb over this mass range
Supersymmetry breaking phase in three dimensional large N gauge theories

Three dimensional supersymmetric gauge theories are often in a gapped phase, in which SUSY is spontaneously broken, if all the matter fields are massive and decoupled in the low energy. We study this phase in the large N limit using the localization technique for the theory on the ellipsoid, which interpolates the round three sphere and the flat space compactified on S¹. We find a large N saddle point solution for the gauge theory with some massive matter fields. This solution gives a vanishing (generalized) Polyakov loop in the flat space limit, thus, it corresponds to the confining phase at the leading order in the 1/N expansion
Constraining Photon Portal Dark Matter with Texono and Coherent Data

Dark matter may reside in sector without Standard Model (SM) gauge
interactions. One way in which such a dark sector can still impact SM particles
through non-gravitational interactions is via the "photon portal" in which a
dark photon kinetically mixes with the ordinary SM photon. We study the
implications of this setup for electron recoil events at TEXONO reactor and
nuclear recoil events at the COHERENT experiment. We find that the recent
COHERENT data rules out previously allowed regions of parameter space favored
by the thermal relic hypothesis for the DM abundance. When mapped onto the
DM-electron cross section, we find that COHERENT provides the leading direct
constraints for DM masses < 30 MeV.Comment: 13 pages, 3 figures, extended study for both fermionic and scalar DM;
  to appear in JHE
Maximal flavour violation : a Cabibbo mechanism for leptoquarks.

We propose a mechanism that allows for sizeable flavour violation in quark-lepton currents, while suppressing flavour changing neutral currents in quark-quark and lepton-lepton sectors. The mechanism is applied to the recently proposed “4321” renormalizable model, which can accommodate the current experimental anomalies in B-meson decays, both in charged and neutral currents, while remaining consistent with all other indirect flavour and electroweak precision measurements and direct searches at high-pT. To support this claim, we present an exhaustive phenomenological survey of this fully calculable UV complete model and highlight the rich complementarity between indirect and direct searches
Search for charged Higgs bosons decaying into top and bottom quarks at s√=13 TeV with the ATLAS detector

A search for charged Higgs bosons heavier than the top quark and decaying via H± → tb is presented. The data analysed corresponds to 36.1 fb−1 of pp collisions at s√=13 TeV and was recorded with the ATLAS detector at the LHC in 2015 and 2016. The production of a charged Higgs boson in association with a top quark and a bottom quark, pp → tbH±, is explored in the mass range from mH± = 200 to 2000 GeV using multi-jet final states with one or two electrons or muons. Events are categorised according to the multiplicity of jets and how likely these are to have originated from hadronisation of a bottom quark. Multivariate techniques are used to discriminate between signal and background events. No significant excess above the background-only hypothesis is observed and exclusion limits are derived for the production cross-section times branching ratio of a charged Higgs boson as a function of its mass, which range from 2.9 pb at mH± = 200 GeV to 0.070 pb at mH± = 2000 GeV. The results are interpreted in two benchmark scenarios of the Minimal Supersymmetric Standard Model
A fusion for the periodic Temperley-Lieb algebra and its continuum limit

The equivalent of fusion in boundary conformal field theory (CFT) can be
realized quite simply in the context of lattice models by essentially glueing
two open spin chains. This has led to many developments, in particular in the
context of chiral logarithmic CFT. We consider in this paper a possible
generalization of the idea to the case of bulk conformal field theory. This is
of course considerably more difficult, since there is no obvious way of merging
two closed spin chains into a big one. In an earlier paper, two of us had
proposed a "topological" way of performing this operation in the case of models
based on the affine Temperley-Lieb (ATL) algebra, by exploiting the associated
braid group representation and skein relations. In the present work, we
establish - using, in particular, Frobenius reciprocity - the resulting fusion
rules for standard modules of ATL in the generic as well as partially
degenerate cases. These fusion rules have a simple interpretation in the
continuum limit. However, unlike in the chiral case this interpretation does
not match the usual fusion in non-chiral CFTs. Rather, it corresponds to the
glueing of the right moving component of one conformal field with the left
moving component of the other.Comment: 40pp, v2: Acknowledgments added, v3: typos fixed and few explanations
  added, for a version in JHE
Spinorial flux tubes in SO(N) gauge theories in 2+1 dimensions

We investigate whether one can observe in SO(3) and SO(4) (lattice) gauge
theories the presence of spinorial flux tubes, i.e. ones that correspond to the
fundamental representation of SU(2); and similarly for SO(6) and SU(4). We do
so by calculating the finite volume dependence of the JP=2+ glueball in 2+1
dimensions, using lattice simulations. We show how this provides strong
evidence that these SO(N) gauge theories contain states that are composed of
pairs of (conjugate) winding spinorial flux tubes, i.e. ones that are in the
(anti)fundamental of the corresponding SU(N') gauge theories. Moreover, these
two flux tubes can be arbitrarily far apart. This is so despite the fact that
the fields that are available in the SO(N) lattice field theories do not appear
to allow us to construct operators that project onto single spinorial flux
tubes.Comment: 23 pages, 8 figures, reference to recent relevant paper, version to
  be submitted to journa
Radial coordinates for defect CFTs

We study the two-point function of local operators in the presence of a
defect in a generic conformal field theory. We define two pairs of cross
ratios, which are convenient in the analysis of the OPE in the bulk and defect
channel respectively. The new coordinates have a simple geometric
interpretation, which can be exploited to efficiently compute conformal blocks
in a power expansion. We illustrate this fact in the case of scalar external
operators. We also elucidate the convergence properties of the bulk and defect
OPE decompositions of the two-point function. In particular, we remark that the
expansion of the two-point function in powers of the new cross ratios converges
everywhere, a property not shared by the cross ratios customarily used in
defect CFT. We comment on the crucial relevance of this fact for the numerical
bootstrap.Comment: Matches journal version; the attached mathematica file (Bulk CB.nb +
  rec.txt) computes the conformal blocks in the bulk channe
Search for Supersymmetry in Events with a τ Lepton Pair and Missing Transverse Momentum in Proton-Proton Collisions at √s = 13 TeV

A search for the electroweak production of supersymmetric particles in proton-proton collisions at a center-of-mass energy of 13 TeV is presented in final states with a τ lepton pair. Both hadronic and leptonic decay modes are considered for the τ leptons. Scenarios involving the direct pair production of τ sleptons, or their indirect production via the decays of charginos and neutralinos, are investigated. The data correspond to an integrated luminosity of 35.9 fb⁻¹ collected with the CMS detector in 2016. The observed number of events is consistent with the standard model background expectation. The results are interpreted as upper limits on the cross section for τ slepton pair production in different scenarios. The strongest limits are observed in the scenario of a purely left-handed low mass τ slepton decaying to a nearly massless neutralino. Exclusion limits are also set in the context of simplified models of chargino-neutralino and chargino pair production with decays to τ leptons, and range up to 710 and 630 GeV, respectively. Keywords: Hadron-Hadron scattering (experiments); Supersymmetr
Search for the Decay of a Higgs Boson in the ℓℓγ Channel in Proton-Proton Collisions at √s = 13 TeV

A search for a Higgs boson decaying into a pair of electrons or muons and a photon is described. Higgs boson decays to a Z boson and a photon (H → Zγ → ℓℓγ, ℓ = e or μ), or to two photons, one of which has an internal conversion into a muon pair (H → γ*γ → μμγ) were considered. The analysis is performed using a data set recorded by the CMS experiment at the LHC from proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb⁻¹. No significant excess above the background prediction has been found. Limits are set on the cross section for a standard model Higgs boson decaying to opposite-sign electron or muon pairs and a photon. The observed limits on cross section times the corresponding branching fractions vary between 1.4 and 4.0 (6.1 and 11.4) times the standard model cross section for H → γ*γ → μμγ (H → Zγ → ℓℓγ) in the 120–130 GeV mass range of the ℓℓγ system. The H → γ*γ → μμγ and H → Zγ →ℓℓγ analyses are combined for mH =125GeV, obtaining an observed (expected) 95% confidence level upper limit of 3.9 (2.0) times the standard model cross section. Keywords: Beyond Standard Model; Hadron-Hadron scattering (experiments); Higgs Physic
Renormalised 3-point functions of stress tensors and conserved currents
  in CFT

We present a complete momentum-space prescription for the renormalisation of
tensorial correlators in conformal field theories. Our discussion covers all
3-point functions of stress tensors and conserved currents in arbitrary
spacetime dimensions. In dimensions three and four, we give explicit results
for the renormalised correlators, the anomalous Ward identities they obey, and
the conformal anomalies. For the stress tensor 3-point function in four
dimensions, we identify the specific evanescent tensorial structure responsible
for the type A Euler anomaly, and show this anomaly has the form of a double
copy of the chiral anomaly.Comment: 70 pages; published versio
Spontaneous breaking of SO(3) to finite family symmetries with supersymmetry — an A4 model.

We discuss the breaking of SO(3) down to finite family symmetries such as A4, S4 and A5 using supersymmetric potentials for the first time. We analyse in detail the case of supersymmetric A4 and its finite subgroups Z3 and Z2. We then propose a supersymmetric A4 model of leptons along these lines, originating from SO(3) × U(1), which leads to a phenomenologically acceptable pattern of lepton mixing and masses once subleading corrections are taken into account. We also discuss the phenomenological consequences of having a gauged SO(3), leading to massive gauge bosons, and show that all domain wall problems are resolved in this mode
Holographic Plasmons

Since holography yields exact results, even in situations where perturbation
theory is not applicable, it is an ideal framework for modeling strongly
correlated systems. We extend previous holographic methods to take the
dynamical charge response into account and use this to perform the first
holographic computation of the dispersion relation for plasmons. As the
dynamical charge response of strange metals can be measured using the new
technique of momentum-resolved electron energy-loss spectroscopy (M-EELS),
plasmon properties are the next milestone in verifying predictions from
holographic models of new states of matter.Comment: 12 pages, 2 figures. v2: Minor changes v3: Minor adjustments v4:
  Published versio
Cosmological perturbations in generalised dark Lagrangians.

We describe a new method to parameterise dark energy theories including massive gravity, elastic dark energy and tensor-metric theories. We first examine the existing framework which describes any second order Lagrangian which depends on the variation of the metric and find new constraints on the parameters. We extend the method to Lorentz violating theories which depend on the variation of the time and spatial parts of the metric separately. We show how this can describe massive gravity and elastic dark energy, while ruling out the whole class of theories where the Lagrangian depends only on the variation of the time part of the metric.\ud
\ud
We further generalise our method to tensor-metric theories, both with and without splitting the metric into time and spatial parts. Our method extends existing physics by providing a mechanism to easily evaluate large classes of dark energy theories
Measurements of Higgs Boson Properties in the Diphoton Decay Channel in Proton-Proton Collisions at √s =13 TeV

Measurements of Higgs boson properties in the H → γγ decay channel are reported. The analysis is based on data collected by the CMS experiment in proton-proton collisions at √s = 13 TeV during the 2016 LHC running period, corresponding to an integrated luminosity of 35.9 fb⁻¹. Allowing the Higgs mass to float, the measurement yields a signal strength relative to the standard model prediction of 1.18[subscript − 0.14][superscript + 0.17]  = 1.18[subscript − 0.11][superscript + 0.12] (stat)[subscript − 0.07][superscript + 0.09](syst)[subscript − 0.06][superscript + 0.07](theo), which is largely insensitive to the exact Higgs mass around 125 GeV. Signal strengths associated with the different Higgs boson production mechanisms, couplings to bosons and fermions, and effective couplings to photons and gluons are also measured. Keywords: Hadron-Hadron scattering (experiments); Higgs physics Photon productio
Mixed global anomalies and boundary conformal field theories

We consider the relation of mixed global gauge gravitational anomalies and
boundary conformal field theory in WZW models for simple Lie groups. The
discrete symmetries of consideration are the centers of the simple Lie groups.
These mixed anomalies prevent to gauge them i.e, take the orbifold by the
center. The absence of anomalies impose conditions on the levels of WZW models.
Next, we study the conformal boundary conditions for the original theories. We
consider the existence of a conformal boundary state invariant under the action
of the center. This also gives conditions on the levels of WZW models. By
considering the combined action of the center and charge conjugation on
boundary states, we reproduce the condition obtained in the orbifold analysis.Comment: 24pages, 1 figure, references adde
Non-Pauli Effects from Noncommutative Spacetimes

Noncommutative spacetimes lead to nonlocal quantum field theories (qft's)
where spin-statistics theorems cannot be proved. For this reason, and also
backed by detailed arguments, it has been suggested that they get corrected on
such spacetimes leading to small violations of the Pauli principle. In a recent
paper \cite{Pauli}, Pauli-forbidden transitions from spacetime noncommutativity
were calculated and confronted with experiments. Here we give details of the
computation missing from this paper. The latter was based on a spacetime
$\mathcal{B}_{\chi\vec{n}}$ different from the Moyal plane. We argue that it
quantizes time in units of $\chi$. Energy is then conserved only mod
$\frac{2\pi}{\chi}$. Issues related to superselection rules raised by non-Pauli
effects are also discussed in a preliminary manner.Comment: 15 Pages, 1 Table, Full details and further developments of
  arXiv:1003.2250. This version is close to the one accepted by JHE
Wrapped M5-branes, consistent truncations and AdS/CMT

At the level of the bosonic fields, we construct consistent Kaluza--Klein
reductions of D=11 supergravity on $\Sigma_3\times S^4$, where
$\Sigma_3=H^3/\Gamma,S^3/\Gamma$ or $R^3/\Gamma$ where $\Gamma$ is a discrete
group of isometries.
  The result is the bosonic content of an N=2 D=4 gauged supergravity with a
single vector multiplet and two hypermultiplets, whose scalar fields
parametrise $SU(1,1)/U(1)\times G_{2(2)}/SO(4)$. %, and the gauging is only in
the hypermultiplet When $\Sigma_3=H^3/\Gamma$ the D=4 theory has an $AdS_4$
vacuum which uplifts to the known supersymmetric $AdS_4\times H^3/\Gamma\times
S^4$ solution of D=11 supergravity that describes the N=2 $d=3$ SCFT arising
when M5-branes wrap SLag 3-cycles $H^3/\Gamma$ in Calabi-Yau three-folds. We
use the KK reduction for $\Sigma_3=H^3/\Gamma$ to construct D=11 black hole
solutions that describe these d=3 SCFTs at finite temperature and charge
density and show that there is a superconducting instability involving a
charged scalar field, and another instability involving involving neutral
fields including both scalar and vector fields. We also use this KK reduction
to construct a D=11 Lifshitz solution that is dual to a d=3 field theory with
dynamical exponent $z\sim 39$.Comment: 47 pages, reference added, typos corrected. Published versio
Domain Walls and Metastable Vacua in Hot Orientifold Field Theories

We consider "Orientifold field theories", namely SU(N) gauge theories with
Dirac fermions in the two-index representation at high temperature. When N is
even these theories exhibit a spontaneously broken Z2 centre symmetry. We study
aspects of the domain wall that interpolates between the two vacua of the
theory. In particular we calculate its tension to two-loop order. We compare
its tension to the corresponding domain wall in a SU(N) gauge theory with
adjoint fermions and find an agreement at large-N, as expected from planar
equivalence between the two theories. Moreover, we provide a non-perturbative
proof for the coincidence of the tensions at large-N. We also discuss the
vacuum structure of the theory when the fermion is given a large mass and argue
that there exist N-2 metastable vacua. We calculate the lifetime of those vacua
in the thin wall approximation.Comment: 29 pages, 4 figures. v2: minor changes in the introduction section.
  to appear in JHE
Magnetic charges in the AdS(4) superalgebra osp(4|2)

We discuss the issue of how to include magnetic charges in the AdS(4)
superalgebra osp(4|2). It is shown that the usual way of introducing a
pseudoscalar central charge on the right hand side of the basic anticommutator
does not work, because this breaks SO(2,3) covariance. We propose a way out by
promoting the magnetic charge to a vector charge, which amounts to enlarge
osp(4|2) to the superconformal algebra su(2,2|1). The conditions for 1/4, 1/2
and 3/4 BPS states are then analyzed. These states form the boundary of the
convex cone associated with the Jordan algebra of 4x4 complex hermitian
matrices. An Inonu-Wigner contraction of the constructed superalgebra yields a
known extension of the Poincare' superalgebra containing electric and magnetic
0-brane charges as well as string- and space-filling 3-brane charges. As an
example, we show how some supersymmetric AdS(4) black holes fit into the
classification scheme of BPS states.Comment: 17 pages, uses JHEP3.cls. v2: ref. added. v3: Section "Final remarks"
  and refs. adde
Decaying Dark Matter in Supersymmetric Model and Cosmic-Ray Observations

We study cosmic-rays in decaying dark matter scenario, assuming that the dark
matter is the lightest superparticle and it decays through a R-parity violating
operator. We calculate the fluxes of cosmic-rays from the decay of the dark
matter and those from the standard astrophysical phenomena in the same
propagation model using the GALPROP package. We reevaluate the preferred
parameters characterizing standard astrophysical cosmic-ray sources with taking
account of the effects of dark matter decay. We show that, if energetic leptons
are produced by the decay of the dark matter, the fluxes of cosmic-ray positron
and electron can be in good agreements with both PAMELA and Fermi-LAT data in
wide parameter region. It is also discussed that, in the case where sizable
number of hadrons are also produced by the decay of the dark matter, the mass
of the dark matter is constrained to be less than 200-300 GeV in order to avoid
the overproduction of anti-proton. We also show that the cosmic gamma-ray flux
can be consistent with the results of Fermi-LAT observation if the mass of the
dark matter is smaller than nearly 4 TeV.Comment: 24 pages, 5 figure
On Loops in Inflation

We study loop corrections to correlation functions of inflationary
perturbations. Previous calculations have found that the two-point function can
have a logarithmic running of the form log(k/mu), where k is the wavenumber of
the perturbation, and mu is the renormalization scale. We highlight that this
result would have profound consequences for both eternal inflation and the
predictivity of standard inflation. We find a different result. We consider two
sets of theories: one where the inflaton has a large cubic self-interaction and
one where the inflaton interacts gravitationally with N massless spectator
scalar fields. We find that there is a logarithmic running but of the form
log(H/mu), where H is the Hubble constant during inflation. We find this result
in three independent ways: by performing the calculation with a sharp cutoff in
frequency-momentum space, in dimensional regularization and by the simple
procedure of making the loop integral dimensionless. For the simplest of our
theories we explicitly renormalize the correlation function proving that the
divergencies can be reabsorbed and that the correlation function for
super-horizon modes does not depend on time (once the tadpole terms have been
properly taken into account). We prove the time-independence of the
super-horizon correlation function in several additional ways: by doing the
calculation of the correlation function at finite time using both the
regularizations and by developing a formalism which expresses loop corrections
directly in terms of renormalized quantities at each time. We find this last
formalism particularly helpful to develop intuition which we then use to
generalize our results to higher loops and different interactions.Comment: 51 pages, 7 figure
The Ultraviolet Finiteness of N=8 Supergravity

We study counterterms (CT's), candidates for UV divergences in the
four-dimensional N=8 supergravity. They have been constructed long ago in a
Lorentz covariant on shell superspace and recently in the chiral light-cone
(LC) superspace. We prove that all of these CT's are ruled out since they are
not available in the real LC superspace. This implies the perturbative UV
finiteness of d=4 N=8 supergravity under the assumption that supersymmetry and
continuous E7 symmetry are anomaly-free. The proof, based on the chiral nature
of CT's in the LC superspace, is a generalization of the perturbative F-term
non-renormalization theorem for N=8 supergravity.Comment: 18 page