Radial and orbital excitations of static-light mesons

TL;DR

This paper reports on lattice QCD calculations of static-light meson spectra, including excited states, using advanced all-to-all propagator techniques to improve signal quality and identify quantum numbers of excitations.

Contribution

It introduces a novel lattice QCD approach with all-to-all propagators to study static-light meson excitations and their quantum numbers.

Findings

Measured splittings between ground and excited states.

Identified quantum numbers of excited static-light mesons.

Demonstrated improved signal resolution over traditional methods.

Abstract

We present results for the spectrum of static-light mesons from Nf=2 lattice QCD. These results were obtained using all-to-all light quark propagators on an anisotropic lattice, yielding an improved signal resolution when compared to more conventional lattice techniques. With a light quark mass close to the strange quark, we have measured the splittings between the ground-state S-wave static-light meson and higher excitations. We attempt to identify the quantum numbers of the excited states in the context of the reduced spatial symmetries of the lattice.