An insight into the rare $Z\rightarrow b \bar{b}γ$ at the HL-LHC
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866917018744127488 |
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| author | Thallapalli, T. Alpana, A. Iyer, A. M. Sharma, S. |
| author_facet | Thallapalli, T. Alpana, A. Iyer, A. M. Sharma, S. |
| contents | Studies at the $Z$-pole have played an important role in developing our understanding of the Standard Model (SM). Continuing the explorations in this regime, we consider the possibility of the production of two $b$-quarks and a photon in proton-proton collisions at the HL-LHC. While such a final state is possible in the SM by means of the process $Z\rightarrow b\bar b$ decay with a radiated photon, the focus is on extracting its possible origins due to beyond Standard Model (BSM) physics. The signal topology can be broadly identified as $Z\rightarrow Φγ\rightarrow b\bar bγ$, where $ Φ$ can either be a spin-0 or spin-2 state with a mass less than that of the $Z$ boson.The analysis is characterised by two relatively low $p_T$ jets that are required to be $b$-tagged jets and an isolated photon. The study provides a quantitative framework for their identification and highlights the potential challenges associated with this final state. A range of machine learning architectures is employed to demonstrate the stability and reliability of the discriminating variables. This study highlights the importance of the low-$p_T$ objects in searches at the HL-LHC, hence the need to pay special attention to their identification and efficiencies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_14597 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | An insight into the rare $Z\rightarrow b \bar{b}γ$ at the HL-LHC Thallapalli, T. Alpana, A. Iyer, A. M. Sharma, S. High Energy Physics - Phenomenology Studies at the $Z$-pole have played an important role in developing our understanding of the Standard Model (SM). Continuing the explorations in this regime, we consider the possibility of the production of two $b$-quarks and a photon in proton-proton collisions at the HL-LHC. While such a final state is possible in the SM by means of the process $Z\rightarrow b\bar b$ decay with a radiated photon, the focus is on extracting its possible origins due to beyond Standard Model (BSM) physics. The signal topology can be broadly identified as $Z\rightarrow Φγ\rightarrow b\bar bγ$, where $ Φ$ can either be a spin-0 or spin-2 state with a mass less than that of the $Z$ boson.The analysis is characterised by two relatively low $p_T$ jets that are required to be $b$-tagged jets and an isolated photon. The study provides a quantitative framework for their identification and highlights the potential challenges associated with this final state. A range of machine learning architectures is employed to demonstrate the stability and reliability of the discriminating variables. This study highlights the importance of the low-$p_T$ objects in searches at the HL-LHC, hence the need to pay special attention to their identification and efficiencies. |
| title | An insight into the rare $Z\rightarrow b \bar{b}γ$ at the HL-LHC |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2510.14597 |