Low-mode averaging for baryon correlation functions

TL;DR

This paper extends the low-mode averaging technique to baryon correlation functions, demonstrating its effectiveness in reducing fluctuations and improving signals in lattice QCD simulations with quenched Neuberger fermions.

Contribution

The paper introduces a generalized low-mode averaging method specifically for baryons and tests its performance on nucleon two-point functions.

Findings

Significant reduction in statistical fluctuations.

Improved baryon signal quality.

Effective on quenched lattice QCD data.

Abstract

The low-mode averaging technique is a powerful tool for reducing large fluctuations in correlation functions due to low-mode eigenvalues of the Dirac operator. In this work we propose a generalization to baryons and test our method on two-point correlation functions of left-handed nucleons, computed with quenched Neuberger fermions on a lattice with extension L=1.5 fm. We show that the statistical fluctuations can be reduced and the baryon signal significantly improved.