Searches for new resonances decaying to two photons and a Z boson and a photon in the ATLAS experiment at the LHC are presented. The analyses are based on $pp$ collision data corresponding to an integrated luminosity of 139 fb⁻¹ at √s = 13 TeV recorded between 2015 and 2018. Three independent searches are performed: a boosted resonance search in the diphoton final state probing masses between 10 and 70 GeV, a diphoton resonance search from 70 to 110 GeV, and a resonance search in the Zγ final state covering masses between 220 GeV up to 3.4 TeV. No significant deviations with respect to the Standard Model are observed and upper limits on their production cross-section times branching ratio are provided.
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L. Pascual Dominguez (2024) studied this question.
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