Heavy-light mesons with staggered light quarks

TL;DR

This paper demonstrates the effectiveness of improved staggered light quarks in heavy-light meson studies, introducing a new operator construction method and analyzing key meson properties with Bayesian curve-fitting.

Contribution

It introduces a novel approach for constructing heavy-light operators using the relation between naive and staggered fermions, enhancing lattice QCD studies of heavy-light mesons.

Findings

Calculated B_s meson kinetic mass

Determined hyperfine and 1P-1S splittings in B_s

Estimated decay constant f_{B_s}

Abstract

We demonstrate the viability of improved staggered light quarks in studies of heavy-light systems. Our method for constructing heavy-light operators exploits the close relation between naive and staggered fermions. The new approach is tested on quenched configurations using several staggered actionsn combined with nonrelativistic heavy quarks. The B_s meson kinetic mass, the hyperfine and 1P-1S splittings in B_s, and the decay constant f_{B_s} are calculated and compared to previous quenched lattice studies. An important technical detail, Bayesian curve-fitting, is discussed at length.