Smeared propagators for lattice hadron spectroscopy

TL;DR

This paper introduces smeared propagators in lattice QCD calculations to improve the accuracy of hadron mass determinations, offering a method comparable to using smeared operators.

Contribution

It proposes a novel approach of replacing ordinary propagators with space-time smeared propagators in lattice hadron spectroscopy.

Findings

Cleaner hadron mass determinations achieved

Comparable effectiveness to smeared operators

Potential for improved lattice QCD analyses

Abstract

We propose to replace ordinary propagators in lattice operator correlations entering the determination of hadron masses with space-time smeared propagators. These are defined as the inverse of the quadratic operator in the fermion action times its hermitian conjugate. We obtain a cleaner determination of hadron masses, comparable to the effect of using smeared operators.