Free-form smearing for bottomonium and B meson spectroscopy

TL;DR

This paper introduces an efficient new implementation of free-form smearing in lattice QCD, significantly reducing computational time while accurately determining the mass spectrum of bottomonium and B mesons, including first-time lattice results.

Contribution

A novel, faster implementation of free-form smearing that enhances lattice QCD spectroscopy of bottomonium and B mesons, including first lattice explorations for some mesons.

Findings

Effective mass spectrum obtained for B, B_s, B_c, and bottomonium mesons.

Significant reduction in computational time compared to previous methods.

First lattice QCD results for certain mesons.

Abstract

To obtain high-quality results from lattice QCD, it is important to use operators that produce good signals for the quantities of interest. Free-form smearing is a powerful tool that helps to accomplish that goal. The present work introduces a new implementation of free-form smearing that maintains its usefulness and reduces its computational time dramatically. Applications to the mass spectrum of $B$, $B_s$, $B_c$ and bottomonium mesons show the effectiveness of the method. Results are compared with other lattice QCD studies and with experimental data where available. The present work includes the first lattice QCD exploration for some of these mesons.