Static-light meson spectroscopy with optimal distillation profiles

TL;DR

This paper investigates static-light and static-charm meson spectra using optimized distillation techniques in lattice QCD, demonstrating improved state overlap and spectral insights at different pion masses.

Contribution

It introduces the use of optimal distillation profiles in lattice QCD to enhance the extraction of meson spectra with multiple quantum numbers.

Findings

Optimal profiles improve overlap with energy states.

Spectra obtained at two different pion masses.

Enhanced state identification with derivative operators.

Abstract

The spectrum of static-light and static-charm mesons is studied using optimized distillation in two different $N_{\rm{f}} = 3 + 1$ QCD ensembles with pion masses of $m_{\pi} \approx 800 \, \text{MeV}$ and $m_{\pi} \approx 420 \,\text{MeV}$ and a heavy (charm) quark. Local and derivative-based operators are used to access states of multiple quantum numbers. The use of optimal profiles is shown to improve the overlap with the energy states compared to standard distillation.