Aaboud, M.Aad, G.Abbott, B.Abdinov, O.Abeloos, B.Abidi, S. H.AbouZeid, O. S.Izen, Joseph M.Meirose, BernhardReeves, KendallATLAS Collaboration2018-09-272018-09-272017-12-102018-09-270370-2693http://hdl.handle.net/10735.1/6164Searches for new phenomena in high-mass diphoton final states with the ATLAS experiment at the LHC are presented. The analysis is based on pp collision data corresponding to an integrated luminosity of 36.7 fb⁻¹ at a centre-of-mass energy √s = 13 TeV recorded in 2015 and 2016. Searches are performed for resonances with spin 0, as predicted by theories with an extended Higgs sector, and for resonances with spin 2, using a warped extra-dimension model as a benchmark model, as well as for non-resonant signals, assuming a large extra-dimension scenario. No significant deviation from the Standard Model is observed. Upper limits are placed on the production cross section times branching ratio to two photons as a function of the resonance mass. In addition, lower limits are set on the ultraviolet cutoff scale in the large extra-dimensions model.enCC BY 4.0 (Attribution)©2017 The Authorshttp://creativecommons.org/licenses/by/4.0/Proton-proton interactionsLuminescenceResonanceStandard model (Nuclear physics)Branching ratios (Nuclear physics)PhotonsarticleAaboud, M., G. Aad, B. Abbott, O. Abdinov, et al. 2017. "Search for new phenomena in high-mass diphoton final states using 37 fb⁻¹ of proton-proton collisions collected at √s=13 TeV with the ATLAS detector." Physics Letters B 775, doi:10.1016/j.physletb.2017.10.039775