Search for heavy resonances decaying into a photon and a hadronically decaying Higgs boson in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

Abstract

This Letter presents a search for the production of new heavy resonances decaying into a Higgs boson and a photon using proton-proton collision data at $\sqrt{s}=13$ TeV collected by the ATLAS detector at the LHC. The data correspond to an integrated luminosity of 139 fb${}^{-1}$. The analysis is performed by reconstructing hadronically decaying Higgs boson $(H\to b\bar{b})$ candidates as single large-radius jets. A novel algorithm using information about the jet constituents in the center-of-mass frame of the jet is implemented to identify the two $b$-quarks in the single jet. No significant excess of events is observed above the expected background. Upper limits are set on the production cross-section times branching fraction for narrow spin-1 resonances decaying into a Higgs boson and a photon in the resonance mass range from 0.7 to 4 TeV, cross-sections times branching fraction are excluded between 11.6 fb and 0.11 fb at a 95% confidence level.

26 pages in total, author list starting page 10, 3 figures, 0 tables, submitted to Phys. Rev. Lett. All figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2018-17/

References in corpus (7)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• New parton distributions for collider physics
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• Luminosity determination in pp collisions at $\sqrt{s}$ = 8 TeV using the ATLAS detector at the LHC
• Low-Scale Technicolor at the Tevatron and LHC
• Measurement of the cross-section of high transverse momentum vector bosons reconstructed as single jets and studies of jet substructure in $pp$ collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector
• Higgs-photon resonances

Cited by in corpus (5)

• Constraining anomalous Higgs boson couplings to virtual photons
• Probing Magnetic Moment Operators in $H\gamma$ Production and $H\to {\tau }^{+}{\tau }^{-}\gamma$ Rare Decay
• Neural networks for boosted di-$\tau$ identification
• Reconstruction and identification of $H\to W{W}^{\ast }$ with high transverse momentum in the full hadronic final state
• Search for $\gamma$H production and constraints on the Yukawa couplings of light quarks to the Higgs boson