Searches for exclusive Higgs and $Z$ boson decays into $J/\psi \gamma$, $\psi (2S)\gamma$, and ${\rm Y}(nS)\gamma$ at $\sqrt{s}=13$ TeV with the ATLAS detector

Abstract

Searches for the exclusive decays of the Higgs and $Z$ bosons into a $J/\psi$, $\psi (2S)$, or ${\rm Y}(nS)$ ($n=1,2,3$) meson and a photon are performed with a $pp$ collision data sample corresponding to an integrated luminosity of 36.1 fb${}^{-1}$ collected at $\sqrt{s}=13$ TeV with the ATLAS detector at the CERN Large Hadron Collider. No significant excess of events is observed above the expected backgrounds, and 95% confidence-level upper limits on the branching fractions of the Higgs boson decays to $J/\psi \gamma$, $\psi (2S)\gamma$, and ${\rm Y}(nS)\gamma$ of $3.5\times 10^{-4}$, $2.0\times 10^{-3}$, and $(4.9,5.9,5.7)\times 10^{-4}$, respectively, are obtained assuming Standard Model production. The corresponding 95% confidence-level upper limits for the branching fractions of the $Z$ boson decays are $2.3\times 10^{-6}$, $4.5\times 10^{-6}$ and $(2.8,1.7,4.8)\times 10^{-6}$, respectively.

36 pages in total, author list starting page 20, 4 figures, 3 tables, submitted to PLB. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2016-23/

References in corpus (32)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• New parton distributions for collider physics
• Event generation with SHERPA 1.1
• Higgs boson gluon-fusion production in N3LO QCD
• NLO Electroweak Corrections to Higgs Boson Production at Hadron Colliders
• Luminosity determination in pp collisions at $\sqrt{s}$ = 8 TeV using the ATLAS detector at the LHC
• Electroweak and QCD corrections to Higgs production via vector-boson fusion at the LHC
• Measurement of the $Z/{\gamma }^{\ast }$ boson transverse momentum distribution in $pp$ collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector
• Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector
• Strong and electroweak corrections to the production of Higgs+2jets via weak interactions at the LHC
• Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data
• Measurement of the muon reconstruction performance of the ATLAS detector using 2011 and 2012 LHC proton-proton collision data
• Evidence for a particle produced in association with weak bosons and decaying to a bottom-antibottom quark pair in Higgs boson searches at the Tevatron
• Evidence for the Higgs-boson Yukawa coupling to tau leptons with the ATLAS detector
• Observation of $\mathrm{t}\overline{\mathrm{t}}$H production
• Higgs-dependent Yukawa couplings
• Evidence for the $H\to b\bar{b}$ decay with the ATLAS detector
• Search for a standard model-like Higgs boson in the mu+ mu- and e+ e- decay channels at the LHC
• Search for the Standard Model Higgs boson decay to ${\mu }^{+}{\mu }^{-}$ with the ATLAS detector
• Relativistic corrections to Higgs boson decays to quarkonia
• Exclusive Radiative Decays of W and Z Bosons in QCD Factorization
• Search for the Decay of the Higgs Boson to Charm Quarks with the ATLAS Experiment
• Search for Higgs and $Z$ Boson Decays to $J/\psi \gamma$ and ${\rm Y}(nS)\gamma$ with the ATLAS Detector
• Search for exclusive Higgs and $Z$ boson decays to $\varphi \gamma$ and $\rho \gamma$ with the ATLAS detector
• Rare exclusive decays of the Z-boson revisited
• $Z$-boson decays to a vector quarkonium plus a photon
• Search for Higgs and $Z$ Boson Decays to $\varphi \gamma$ with the ATLAS Detector
• Addendum: New approach to the resummation of logarithms in Higgs-boson decays to a vector quarkonium plus a photon [Phys. Rev. D 95, 054018 (2017)]

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