Phenomenology of static-light mesons from unquenched lattice QCD calculations

TL;DR

This paper reports unquenched lattice QCD calculations of static-light mesons, providing insights into their properties, decay constants, and the bottom quark mass with improved accuracy.

Contribution

It presents unquenched lattice QCD results for static-light mesons, including decay constants and bottom quark mass, using improved actions at fixed lattice spacing.

Findings

Calculated the bottom quark mass: m_b(m_b) = 4.25(2)(11) GeV.

Compared heavy-light chiral perturbation theory with decay constants.

Provided results at a lattice spacing of 0.1 fm with light sea quark masses.

Abstract

We present results for the static-light meson from unquenched lattice QCD. The unquenched gauge configurations were generated using the non-perturbatively improved clover action. At the fixed lattice spacing of 0.1 fm the lightest sea quark mass used is a third of the strange quark mass. A comparison is made between heavy-light chiral perturbation theory and the f_B^(static) decay constant. The mass of the bottom quark is also reported: m_b(m_b) = 4.25(2)(11) GeV, where the first error is statistical and the last error is the systematic uncertainty.