Prospects for searches of b → sν ν ¯ decays at FCC-ee

Amhis, Yasmine; Kenzie, Matthew; Reboud, Méril; Wiederhold, Aidan R.

Abstract

We investigate the physics reach and potential for the study of various decays involving a b→sνν¯ 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 bb¯, cc¯ 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 B0→K∗0νν¯, Bs0→ϕνν¯, B0→KS0νν¯ and Λb0→Λνν¯ 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.

Citation

Amhis, Y., Kenzie, M., Reboud, M., & Wiederhold, A. R. (2024). Prospects for searches of b → sν ν ¯ decays at FCC-ee. Journal of High Energy Physics, 2024(1), Article 144. https://doi.org/10.1007/jhep01%282024%29144

• Journal Article Type: Article
• Acceptance Date: Jan 11, 2024
• Online Publication Date: Jan 24, 2024
• Publication Date: Jan 24, 2024
• Deposit Date: Mar 25, 2024
• Publicly Available Date: Mar 25, 2024
• Journal: Journal of High Energy Physics
• Print ISSN: 1126-6708
• Electronic ISSN: 1029-8479
• Publisher: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
• Peer Reviewed: Peer Reviewed
• Volume: 2024
• Issue: 1
• Article Number: 144
• DOI: https://doi.org/10.1007/jhep01%282024%29144
• Keywords: B Physics, e+-e− Experiments, Rare Decay, Flavour Changing Neutral Currents
• Public URL: https://durham-repository.worktribe.com/output/2167395