Background processes in Higgs decay to Z gamma
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866909536730742784 |
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| author | Kachanovich, Aliaksei |
| author_facet | Kachanovich, Aliaksei |
| contents | The ATLAS and CMS Collaborations reported that the observed number of Higgs boson decays into a $Z$ boson and a photon is $μ= 2.2 \pm 0.7$ times higher than predicted by the Standard Model. Initially, this discrepancy was attributed to a modification of the $HZγ$ vertex. In the $H \to Zγ$ process, this decay is reconstructed from $H \to \ell\ellγ$, where $\ell$ 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 $H \to \ell\ellγ$ from various subprocesses within and beyond the Standard Model. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_10444 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Background processes in Higgs decay to Z gamma Kachanovich, Aliaksei High Energy Physics - Phenomenology High Energy Physics - Experiment The ATLAS and CMS Collaborations reported that the observed number of Higgs boson decays into a $Z$ boson and a photon is $μ= 2.2 \pm 0.7$ times higher than predicted by the Standard Model. Initially, this discrepancy was attributed to a modification of the $HZγ$ vertex. In the $H \to Zγ$ process, this decay is reconstructed from $H \to \ell\ellγ$, where $\ell$ 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 $H \to \ell\ellγ$ from various subprocesses within and beyond the Standard Model. |
| title | Background processes in Higgs decay to Z gamma |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2503.10444 |