The $B_{(s)} \to D_{(s)}l\nu$ Decay with Highly Improved Staggered Quarks and NRQCD

TL;DR

This paper presents progress in lattice QCD calculations of semileptonic B and Bs decays using improved staggered and NRQCD actions to determine form factors with high precision.

Contribution

It introduces a combined use of HISQ and NRQCD actions on MILC ensembles for more accurate semileptonic decay form factor calculations.

Findings

Progress in calculating B→Dlν and Bs→Ds lν form factors.

Use of HISQ for light and charm quarks improves accuracy.

Application of improved NRQCD for bottom quarks enhances results.

Abstract

We report on progress of a lattice QCD calculation of the $B\to Dl\nu$ and $B_s\to D_s l\nu$ semileptonic form factors. We use a relativistic staggered action (HISQ) for light and charm quarks, and an improved non-relativistic (NRQCD) action for bottom, on the second generation MILC ensembles.