The measurement, fitting and interpretation of the radial distributions of Heavy-Light mesons calculated on a lattice with dynamical fermions

TL;DR

This paper presents improved lattice QCD measurements of heavy-light meson radial distributions, incorporating dynamical fermions, more configurations, off-axis data, and analysis of excited states to enhance understanding of meson structure.

Contribution

The study introduces advanced lattice techniques including dynamical fermions, increased data, off-axis insertions, and excited state analysis for more accurate meson radial distribution measurements.

Findings

Radial distributions are now measured with dynamical fermions.

Inclusion of off-axis insertions improves spatial resolution.

Excited state distributions are successfully extracted.

Abstract

In our earlier work, the charge and matter radial distributions of heavy-light mesons were measured on a 16^3 times 24 lattice with a lattice spacing of a = 0.17 fm and a light quark mass about that of the strange quark. Several major improvements have now been made: 1) Dynamical fermions are used with a approximately 0.14 fm; 2) More gauge configurations are included (78 vs 20); 3) Off-axis, in addition to on-axis, insertions are made; 4) The data analysis is much more complete. In particular, distributions involving excited states are extracted.