Correlation functions at small quark masses with overlap fermions

TL;DR

This paper discusses numerical techniques to improve the statistical accuracy of three-point correlation functions computed with overlap fermions at small quark masses, aiming to understand low-energy constants related to weak transitions.

Contribution

It introduces specific numerical methods to enhance statistical signals in lattice QCD calculations involving overlap fermions near the chiral limit.

Findings

Improved statistical signals in three-point functions

Enhanced determination of low-energy constants

Insights into DeltaS=1 weak transitions

Abstract

We report on recent work on the determination of low-energy constants describing Delta{S}=1 weak transitions, in order to investigate the origins of the Delta{I}=1/2 rule. We focus on numerical techniques designed to enhance the statistical signal in three-point correlation functions computed with overlap fermions near the chiral limit.