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

The, A.Aad, G.Abbott, B.Abdallah, J.Abdinov, O.Abeloos, B.Aben, R.Abolins, M.AbouZeid, O.Abramowicz, H.Abreu, H.Abreu, R.Abulaiti, Y.Acharya, B.Adamczyk, L.Adams, D.Adelman, J.Adomeit, S.Adye, T.Affolder, A.et al.2018-10-182018-10-182016Journal of High Energy Physics (JHEP), 2016; 2016(3):041-1-041-371126-67081029-8479http://hdl.handle.net/2440/115241A 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.en© The Author(s) 2016. This article is published under an open access license. Please check the 'Copyright Information' section for details of this license and what re-use is permitted. If your intended use exceeds what is permitted by the license or if you are unable to locate the licence and re-use information, please contact the Rights and Permissions team.Hadron-Hadron scatteringSearch for new phenomena with photon+jet events in proton-proton collisions at √s = 13 TeV with the ATLAS detectorSearch for new phenomena with photon+jet events in proton-proton collisions at root s = 13 TeV with the ATLAS detectorJournal article003004533810.1007/JHEP03(2016)0410003722914000012-s2.0-84961247437226543