Feb 15 – 17, 2023
Università di Pisa - Dipartimento di Fisica
Europe/Rome timezone

𝐵𝑠→𝜇𝜇𝛾 decay in the high-𝑞2 region

Feb 16, 2023, 10:10 AM
20m
Aula Magna - Dipartimento di Fisica (Università di Pisa - Dipartimento di Fisica)

Aula Magna - Dipartimento di Fisica

Università di Pisa - Dipartimento di Fisica

Largo Bruno Pontecorvo 3, I-56127, Pisa, Italy

Speaker

Camille Normand (Istituto Nazionale di Fisica Nucleare)

Description

In this talk, we consider the rare decay channel $B_s\rightarrow\mu\mu\gamma$, the radiative counterpart of the very rare $B_s\rightarrow\mu\mu$ decay, from both theoretical and experimental perspectives. This decay is sensitive to possible new vector couplings in the $b\rightarrow s\mu\mu$ interaction vertex. Using different form factors parametrizations of the $B_s\rightarrow\gamma$ transition, we study the differential and integrated branching fractions in the region of high invariant dimuon mass. Additionally, we consider the effective lifetime of $B_s\rightarrow\mu\mu\gamma$ as a new observable, sensitive to non-SM-like CP violation. In addition, we present the first experimental search of this channel in LHCb, through a partial reconstruction method, and we discuss the possibilities of improving and extending this measurement in Run 2 data, and the prospects using the upcoming Run 3 data.

Presentation materials