Excited-State Hadrons using the Stochastic LapH Method

TL;DR

This paper presents a novel stochastic LapH method for calculating the spectrum of excited hadrons in lattice QCD, enabling more reliable analysis of complex hadronic states.

Contribution

Introduction of a stochastic LapH technique that improves the estimation of quark propagation effects in lattice QCD calculations of excited hadron spectra.

Findings

Successful testing on eta, sigma, omega mesons

Reliable determination of temporal correlations for hadron operators

Enhanced capability to study excited baryons and mesons

Abstract

Progress in computing the spectrum of excited baryons and mesons in lattice QCD is described. Large sets of spatially-extended hadron operators are used. A new method of stochastically estimating the low-lying effects of quark propagation is utilized which allows reliable determinations of temporal correlations of both single-hadron and multi-hadron operators. The method is tested on the eta, sigma, omega mesons.