Heavy-light physics with NRQCD

TL;DR

This paper presents initial results on B meson properties using NRQCD for heavy quarks and Wilson propagators for light quarks, demonstrating improved signal quality and direct computation at the b quark mass.

Contribution

It introduces a method combining NRQCD and Wilson propagators to study B mesons, avoiding extrapolation to the b quark mass and showing enhanced signal-to-noise ratio.

Findings

f_B less than 200 MeV

B*-B splitting of 32(8) MeV

Better signal/noise than static propagators

Abstract

First results are obtained for B mesons using a heavy propagator calculated using NRQCD, and a light Wilson propagator. Results from 13 quenched configurations of size 16^3 x 48 at \beta = 6.0 give a value for f_{B} of less than 200 Mev and a B^{*}-B splitting of 32(8) MeV. Superior signal/noise behaviour is observed over static propagators on the same configurations. No extrapolation to the b mass for the heavy quark is required.