Chiral properties of domain wall fermions with improved gauge actions

TL;DR

This paper investigates how different improved gauge actions affect the chiral properties of quenched domain wall fermions, showing that certain actions can significantly reduce residual chiral symmetry breaking.

Contribution

It demonstrates that improved gauge actions like Symanzik, Iwasaki, and DBW2 can suppress nearly translationally invariant modes, enhancing chiral symmetry in domain wall fermions.

Findings

Improved gauge actions reduce residual mass compared to Wilson action.

Symanzik, Iwasaki, and DBW2 actions outperform Wilson in chiral property preservation.

Suppression of dominant modes improves chiral symmetry in lattice simulations.

Abstract

We study the chiral properties of quenched domain wall fermions with several gauge actions. We demonstrate that the nearly translationally invariant modes in the fifth dimension that dominate the residual mass for Wilson gauge action can be substantially suppressed using improved gauge actions. In particular, we study the Symanzik action, the Iwasaki action, the DBW2 action and compare them to the Wilson action.