Lattice 2024

Bs -> mu+mu- gamma & Bs -> phi gamma decay rates from Nf=2+1+1 twisted mass simulations

30 Jul 2024, 16:15

20m

Talk Quark and Lepton Flavour Physics Quark and lepton flavour physics

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 $\sqrt{q^2}>4.16\mathrm{G}\mathrm{e}\mathrm{V}$, and adopting a novel strategy to circumvent the problem of analytic continuation of electroweak amplitude.
We will also present preliminary results of the $B_s\to \varphi \gamma$ decay rate.

Presentation materials

bimbumbam.pdf