2025/03/13 by Aliaksei Kachanovich, Kachanovich, Aliaksei
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2503.10444
openalex publication_date 2025/03/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The ATLAS and CMS Collaborations reported that the observed number of Higgs boson decays into a Z boson and a photon is μ= 2.2 ± 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 → Zγ process, this decay is reconstructed from H → ℓℓγ, where ℓ 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 → ℓℓγ from various subprocesses within and beyond the Standard Model.