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 - INSPIRE

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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

ATLAS

Collaboration

Aug 13, 2020

26 pages

Published in:

Phys.Rev.Lett. 125 (2020) 251802

Published: Dec 18, 2020

e-Print:

2008.05928 [hep-ex]

DOI:

10.1103/PhysRevLett.125.251802

PDG: Limits for other

{{\mathit Z}^{\,'}}

Report number:

CERN-EP-2020-128,
CERN preprint ID: CERN-EP-2020-128

Experiments:

CERN-LHC-ATLAS

View in:

reference search11 citations

Citations per year

Abstract: (arXiv)

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.

Note:

All figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2018-17/ •
Submitted to Phys.Rev.Lett.

p p: colliding beams
resonance: production
narrow resonance
resonance: heavy
p p: scattering
resonance: decay modes
Higgs particle: associated production
resonance: mass
spin: resonance
spin: 1

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