Masses and Decay Constants of Heavy-Light Mesons Using the Multistate Smearing Technique

TL;DR

This paper calculates the decay constants and masses of heavy-light mesons using a multistate smearing technique within lattice QCD, providing insights into meson properties with various quark masses.

Contribution

It introduces a multistate smearing approach applied to heavy-light meson calculations in the quenched approximation, extending previous methods.

Findings

Computed decay constants f_B for different beta values.

Determined meson masses with light quark masses down to 300 MeV.

Established the scale using 1P--1S charmonium splitting.

Abstract

We present results for f_B and masses of low-lying heavy-light mesons. Calculations were performed in the quenched approximation using multistate smearing functions generated from a spinless relativistic quark model Hamiltonian. Beta values range from 5.7 to 6.3, and light quark masses corresponding to pion masses as low as 300 MeV are computed at each value. We use the 1P--1S charmonium splitting to set the overall scale.