Volume 481 - 9th Symposium on Prospects in the Physics of Discrete Symmetries (DISCRETE2024) - Collider 2
Background processes in Higgs decay to Z gamma
A.Β Kachanovich
Full text: pdf
Published on: April 10, 2025
Abstract
The ATLAS and CMS Collaborations reported that the observed number of Higgs boson decays into a 𝑍 boson and a photon is πœ‡ = 2.2 Β± 0.7 times higher than predicted by the Standard Model. Initially, this discrepancy was attributed to a modification of the 𝐻𝑍𝛾 vertex. In the 𝐻 β†’ 𝑍𝛾 process, this decay is reconstructed from 𝐻 β†’ ℓℓ𝛾, where β„“ represents either an electron or a muon. In this study, an investigation is conducted to examine this anomaly by exploring potential additional background contributions to 𝐻 β†’ ℓℓ𝛾 from various subprocesses within and beyond the Standard Model.
DOI: https://doi.org/10.22323/1.481.0008
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