Aad, G.Abbott, B.Abbott, D. C.Abud, A. AbedAbeling, K.Abhayasinghe, D. K.Çetin, Serkant Ali2024-07-182024-07-1820210370-26931873-2445https://doi.org/10.1016/j.physletb.2021.136651https://hdl.handle.net/11411/8837Searches for new resonances in the diphoton final state, with spin 0 as predicted by theories with an extended Higgs sector and with spin 2 using a warped extra-dimension benchmark model, are presented using 139 fb(-1) of root s = 13 TeV pp collision data collected by the ATLAS experiment at the LHC. No significant deviation from the Standard Model is observed and upper limits are placed on the production cross-section times branching ratio to two photons as a function of the resonance mass. (C) 2021 The Author(s). Published by Elsevier B.V.eninfo:eu-repo/semantics/openAccessHierarchyArticle2-s2.0-8511912840510.1016/j.physletb.2021.136651Q1822Q1WOS:000703669100040