Prospects for searches of $b \to s ν\barν$ decays at FCC-ee
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866914653290889216 |
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| author | Amhis, Yasmine Kenzie, Matthew Reboud, Méril Wiederhold, Aidan R. |
| author_facet | Amhis, Yasmine Kenzie, Matthew Reboud, Méril Wiederhold, Aidan R. |
| contents | We investigate the physics reach and potential for the study of various decays involving a $b \to s ν\barν$ transition at the Future Circular Collider running electron-positron collisions at the $Z$-pole (FCC-ee). Signal and background candidates, which involve inclusive $Z$ contributions from $b\bar{b}$, $c\bar{c}$ and $uds$ final states, are simulated for a proposed multi-purpose detector. Signal candidates are selected using two Boosted Decision Tree algorithms. We determine expected relative sensitivities of $0.53\%$, $1.20\%$, $3.37\%$ and $9.86\%$ for the branching fractions of the $B^{0} \to K^{*0} ν\barν$, $B^{0}_{s} \to ϕν\barν$, $B^{0} \to K^{0}_{S} ν\barν$ and $Λ_{b}^{0} \to Λ^{0} ν\barν$ decays, respectively. In addition, we investigate the impact of detector design choices related to particle-identification and vertex resolution. The phenomenological impact of such measurements on the extraction of Standard Model and new physics parameters is also studied. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_11353 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Prospects for searches of $b \to s ν\barν$ decays at FCC-ee Amhis, Yasmine Kenzie, Matthew Reboud, Méril Wiederhold, Aidan R. High Energy Physics - Experiment High Energy Physics - Phenomenology We investigate the physics reach and potential for the study of various decays involving a $b \to s ν\barν$ transition at the Future Circular Collider running electron-positron collisions at the $Z$-pole (FCC-ee). Signal and background candidates, which involve inclusive $Z$ contributions from $b\bar{b}$, $c\bar{c}$ and $uds$ final states, are simulated for a proposed multi-purpose detector. Signal candidates are selected using two Boosted Decision Tree algorithms. We determine expected relative sensitivities of $0.53\%$, $1.20\%$, $3.37\%$ and $9.86\%$ for the branching fractions of the $B^{0} \to K^{*0} ν\barν$, $B^{0}_{s} \to ϕν\barν$, $B^{0} \to K^{0}_{S} ν\barν$ and $Λ_{b}^{0} \to Λ^{0} ν\barν$ decays, respectively. In addition, we investigate the impact of detector design choices related to particle-identification and vertex resolution. The phenomenological impact of such measurements on the extraction of Standard Model and new physics parameters is also studied. |
| title | Prospects for searches of $b \to s ν\barν$ decays at FCC-ee |
| topic | High Energy Physics - Experiment High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2309.11353 |