Topological susceptibility and axial symmetry at finite temperature

TL;DR

This paper investigates the behavior of topological susceptibility and axial symmetry in finite temperature QCD, using simulations to understand how topology fixing influences physical observables near the chiral phase transition.

Contribution

It presents a preliminary study on the effects of fixed topology in finite temperature QCD simulations with overlap fermions, including topological susceptibility and meson correlator degeneracy.

Findings

Topological susceptibility can be reconstructed from fixed topology simulations.

Degeneracy of meson correlators observed at high temperature.

Fixed topology effects are manageable in finite temperature QCD studies.

Abstract

We consider the simulation of finite temperature QCD with two flavors of dynamical overlap fermions in order to study the suppression of the axial U(1) symmetry breaking at the chiral phase transition point. As a preliminary study, pure gauge simulations are performed to investigate how fixing the topology affects physical quantities like the topological susceptibility, $\chi_t$, at finite temperature, showing that it is possible to reconstruct known results from the fixed topology sector. First results on the degeneracy of meson correlators in the high temperature QGP sector are shown.