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Rare Higgs decays investigated by the ATLAS experiment

Rare Higgs decays investigated by the ATLAS experiment

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This episode details the ATLAS Collaboration's ongoing research into rare Higgs boson decays at the Large Hadron Collider (LHC), specifically focusing on decays to muons (H→μμ) and to a Z boson and a photon (H→Zγ). These studies, utilising data from LHC Run 3 (2022–2024) and combined with Run 2 (2015–2018) data, aim to test the Standard Model by precisely measuring these infrequent processes. The documents explain the experimental methods used to identify these rare events, including sophisticated data analysis techniques and event categorisation, and present the statistical significance of the observed evidence. The findings demonstrate improved sensitivity and contribute to a more comprehensive understanding of the Higgs boson's properties.


Papers:

https://arxiv.org/pdf/2507.03595

https://cds.cern.ch/record/2937635/files/ATLAS-CONF-2025-007.pdf

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