Search for short- and long-lived axion-like particles in H → a a → 4 γ decays with the ATLAS experiment at the LHC

UNSPECIFIED (2024) Search for short- and long-lived axion-like particles in H → a a → 4 γ decays with the ATLAS experiment at the LHC. European Physical Journal C: Particles and Fields, 84 (7): 742. ISSN 1434-6044

Abstract

Presented is the search for anomalous Higgs boson decays into two axion-like particles (ALPs) using the full Run 2 data set of 140fb-1 of proton-proton collisions at a centre-of-mass energy of 13TeV recorded by the ATLAS experiment. The ALPs are assumed to decay into two photons, providing sensitivity to recently proposed models that could explain the (g-2)μ discrepancy. This analysis covers an ALP mass range from 100 to 62GeV and ALP-photon couplings in the range 10-7TeV-1