Volume 466 - The 41st International Symposium on Lattice Field Theory (LATTICE2024) - Quark and Lepton Flavour Physics
Form factors for semi-leptonic $B_{(s)} \to D_{(s)}^∗\ell \nu_\ell$ decays
A. Boushmelev*, M. Black, O. Witzel and  RBC/UKQCD collaborations
*: corresponding author
Full text: pdf
Pre-published on: February 19, 2025
Published on: —
Abstract
Semileptonic $B_{(s)}$ decays are of great phenomenological interest
because they allow to extract CKM matrix elements or test lepton flavour
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 flavour 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 $B_s \to D_s^* \ell \nu_\ell$ are presented.
DOI: https://doi.org/10.22323/1.466.0251
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