Multi-Particle Baryon Spectroscopy

TL;DR

This paper explores excited baryon states using lattice QCD with five-quark interpolators, employing stochastic methods to improve calculations and analyzing their contributions for future spectroscopic studies.

Contribution

It introduces a novel approach using five-quark interpolators and stochastic estimation techniques for baryon spectroscopy in lattice QCD.

Findings

Effective mass plots from five-quark interpolators

Analysis of connected and loop contributions

Variance reduction via dilution techniques

Abstract

In Nature the excited states of the hadron spectrum appear as resonances. Consequently, there has been significant interest in studying the excited baryon spectrum using lattice QCD. With this in mind we perform spectroscopic calculations with five-quark interpolating fields. Stochastic estimation techniques are used in order to calculate the loop propagators, with dilution in spin, colour and time implemented as a means of variance reduction. We present effective mass plots extracted from these five-quark interpolators, and examine the contributions from fully-connected and loop-containing pieces of the correlation function, keeping in mind their use in future corre- lation matrix studies.