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Scientific article
Open access
English

Search for new phenomena with photon+jet events in proton-proton collisions at √s = 13 TeV with the ATLAS detector

ContributorsATLAS Collaboration
Published inThe journal of high energy physics, vol. 1603, p. 041-078
Collection
  • Open Access - SCOAP3
Publication date2016
Abstract

A search is performed for the production of high-mass resonances decaying into a photon and a jet in 3.2 fb −1 of proton-proton collisions at a centre-of-mass energy of √s = 13 TeV collected by the ATLAS detector at the Large Hadron Collider. Selected events have an isolated photon and a jet, each with transverse momentum above 150 GeV. No significant deviation of the γ+jet invariant mass distribution from the background-only hypothesis is found. Limits are set at 95% confidence level on the cross sections of generic Gaussian-shaped signals and of a few benchmark phenomena beyond the Standard Model: excited quarks with vector-like couplings to the Standard Model particles, and non-thermal quantum black holes in two models of extra spatial dimensions. The minimum excluded visible cross sections for Gaussian-shaped resonances with width-to-mass ratios of 2% decrease from about 6 fb for a mass of 1.5 TeV to about 0.8 fb for a mass of 5 TeV. The minimum excluded visible cross sections for Gaussian-shaped resonances with width-to-mass ratios of 15% decrease from about 50 fb for a mass of 1.5 TeV to about 1.0 fb for a mass of 5 TeV. Excited quarks are excluded below masses of 4.4 TeV, and non-thermal quantum black holes are excluded below masses of 3.8 (6.2) TeV for Randall-Sundrum (Arkani-Hamed-Dimopoulous-Dvali) models with one (six) extra dimensions.

Keywords
  • Hadron-Hadron scattering
Citation (ISO format)
ATLAS Collaboration. Search for new phenomena with photon+jet events in proton-proton collisions at √s = 13 TeV with the ATLAS detector. In: The journal of high energy physics, 2016, vol. 1603, p. 041–078. doi: 10.1007/JHEP03(2016)041
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Article (Published version)
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ISSN of the journal1029-8479
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