2023/09/15 by Y. Amhis, Ahmis, Yasmine, M. Kenzie +5
Physics and Astronomy · #Particle physics theoretical and experimental studies #Dark Matter and Cosmic Phenomena #Particle Detector Development and Performance
paper · pdf · doi:10.17181/6k4q7-veh06
We investigate the physics reach and potential for the study of various decays involving a \bsnunu 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 \BdKstNuNu, \BsPhiNuNu, \BdKSNuNu and \LbLzNuNu 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.