School on Continuum Foundations of Lattice Gauge Theories

Form factors for semi-leptonic B(s)→D(s)∗ℓνℓ decays

22 Jul 2024, 19:00

1h

500/1-201 - Mezzanine (CERN)

Poster Posters

Description

Semileptonic $B_{(s)}$​ decays are of great phenomenological interest
because they allow to extract CKM matrix elements or test lepton flavor
universality. Taking advantage of existing data, we explore extracting
form factors for vector final states​ using the narrow width
approximation. Based on RBC-UKQCD's set of 2+1 flavor gauge field
ensembles with Shamir domain-wall fermion and Iwasaki gauge field
action, we study semileptonic $B_{(s)}$ decays using domain-wall
fermions for light, strange and charm quarks, whereas bottom quarks are
simulated with the relativistic heavy quark (RHQ) action. Exploratory
results for $B_s\to D_s^{\ast }\ell {\nu }_{\ell }$ are presented.