Centre Vortex Effects on the Overlap Quark Propagator

TL;DR

This paper explores how centre vortices influence dynamical mass generation in QCD by analyzing the overlap quark propagator on different gauge field backgrounds, revealing the topological effects on chiral symmetry.

Contribution

It provides new insights into the impact of centre vortices on the overlap quark propagator and mass function, highlighting the role of topology in chiral symmetry breaking.

Findings

Vortex removal alters the quark propagator significantly.

Vortex-only backgrounds retain key features of the original propagator.

Cooling vortex-only configurations affects the overlap quark propagator.

Abstract

We investigate the role of centre vortices in dynamical mass generation using overlap fermions. The exact chiral symmetry that the overlap fermion action possesses yields a distinctive response to the underlying topology of the gauge field, leading to novel results. We study the quark propagator and associated mass function on gauge field backgrounds featuring the removal of centre vortices as well as on vortex-only backgrounds. The effect of cooling vortex-only backgrounds on the overlap quark propagator is also presented.