Baryon Spectroscopy from Lattice QCD

TL;DR

This paper discusses advances in lattice QCD techniques for baryon spectroscopy, focusing on excited-state mass extraction using extended operators and stochastic methods for all-to-all propagator estimates.

Contribution

It introduces variance reduction techniques for stochastic all-to-all propagator estimates, enabling better inclusion of multi-hadron operators in baryon mass calculations.

Findings

Improved methods for excited-state baryon mass extraction.

Effective incorporation of multi-hadron operators.

Enhanced accuracy in lattice QCD baryon spectroscopy.

Abstract

Progress in extracting excited-state baryon masses in lattice QCD using large sets of spatially-extended operators is presented. The use of stochastic estimates of all-to-all quark propagators with variance reduction techniques is described. Such techniques are crucial for incorporating multi-hadron operators into the correlation matrices of the hadron operators.