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Abstract |
In this talk, we consider the decay channel \Bsmmy, from both
theoretical and experimental perspectives. On the theory side, using
different form factors parametrizations of the $\Bs \to \gamma$
transition, we study the differential and integrated branching fractions
in the region of high invariant dimuon mass. Additionally, we consider
the effective lifetime of \Bsmmy as a new observable, sensitive to
non-SM-like \CP violation. Then, we turn to the status of the
(uncompleted) experimental analysis at LHCb, dedicated to a search for
this decay in the same kinematic region.
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