New measurements of rare B meson decays to two muons by the CMS experiment

Petit Amphi (LAPP)

Petit Amphi


Francesco Costanza (Centre National de la Recherche Scientifique (FR)), Laura Zambelli (LAPP)

Massachusetts Institute of Technology - MIT, Cambridge (USA)

A number of anomalies have been observed in rare B decays by the LHCb experiment indicating a potential new physics contribution. To understand the nature of these anomalies and to confirm their existence we need to have independent measurements performed by other experiments. In this seminar, I will present a new measurement of the Bs → μμ branching fraction and effective lifetime, as well as results of a search for the B0 → μμ decay. The analysis is based on proton-proton collision data collected by the CMS experiment at the 13 TeV center of mass energy during the LHC Run 2, corresponding to an integrated luminosity of 140/fb.

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