Speaker
Dr
Francesco Sanfilippo
(INFN Roma Tre)
Description
We present our recent estimate of the $B_s\to \mu^+\mu^-\gamma$ decay rate at large $q^2$, computed on four lattice spacing of $N_f=2+1+1$ twisted mass simulations. The relevant form factors are extrapolated to physical $B_s$ meson mass from simulations carried out up to $2M_{D_s}$, covering the region of $\sqrt{q^2}>4.16\, {\rm GeV}$, and adopting a novel strategy to circumvent the problem of analytic continuation of electroweak amplitude.
We will also present preliminary results of the $B_s\to\phi\gamma$ decay rate.
Author
Dr
Francesco Sanfilippo
(INFN Roma Tre)
