The 37th International Symposium on Lattice Field Theory (Lattice 2019)

The $B \to D^\ast\ell\nu$ semileptonic decay at nonzero recoil and its implications for $|V_cb|$ and $R(D^\ast)$

17 Jun 2019, 14:40

20m

Shimao 5

Parallel Weak Decays and Matrix Elements Weak Decays and Matrix Elements

Speaker

Dr Alejandro Vaquero Avilés-Casco (University of Utah)

Description

We present nearly final results from our analysis of the form factors for $B \to D^\ast\ell\nu$ decay at nonzero recoil. Our analysis includes 15 MILC asqtad ensembles with $N_f$=2+1 flavors of sea quarks and lattice spacings ranging from $a\approx$ 0.15 fm down to 0.045 fm. The valence light quarks employ the asqtad action, whereas The b and c quarks are treated using the Fermilab action. We discuss the impact that our results will have on $|V_{cb}|$ and $R(D^\ast)$

Presentation materials

Lat19-Talk.pdf