The excited hadron spectrum in lattice QCD using a new method of estimating quark propagation

TL;DR

This paper introduces a new stochastic method for estimating quark propagation in lattice QCD, improving the extraction of excited hadron spectra by using carefully designed operators.

Contribution

A novel stochastic approach for estimating low-lying quark effects that enhances the reliability of excited hadron spectrum calculations in lattice QCD.

Findings

Effective hadron operators facilitate excited-state energy extraction

New stochastic method improves temporal correlation estimates

Potential for more accurate excited hadron spectrum determination

Abstract

Progress in determining the spectrum of excited baryons and mesons in lattice QCD is described. Large sets of carefully-designed hadron operators have been studied and their effectiveness in facilitating the extraction of excited-state energies is demonstrated. A new method of stochastically estimating the low-lying effects of quark propagation is proposed which will allow reliable determinations of temporal correlations of single-hadron and multi-hadron operators.