NePSi 23

𝐵𝑠→𝜇𝜇𝛾 decay in the high-𝑞2 region

16 Feb 2023, 10:10

20m

Aula Magna - Dipartimento di Fisica (Università di Pisa - Dipartimento di Fisica)

Young Researchers Session

Speaker

Camille Normand (Istituto Nazionale di Fisica Nucleare)

Description

In this talk, we consider the rare decay channel $B_s\to \mu \mu \gamma$, the radiative counterpart of the very rare $B_s\to \mu \mu$ decay, from both theoretical and experimental perspectives. This decay is sensitive to possible new vector couplings in the $b\to s\mu \mu$ interaction vertex. Using different form factors parametrizations of the $B_s\to \gamma$ transition, we study the differential and integrated branching fractions in the region of high invariant dimuon mass. Additionally, we consider the effective lifetime of $B_s\to \mu \mu \gamma$ 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

NePsi_Normand.pdf