# Manifestations of the axial anomaly in finite temperature QCD

## TL;DR

This paper investigates how the axial anomaly manifests in finite temperature QCD by analyzing meson correlators and screening masses, providing insights into the $U_A(1)$ symmetry restoration and fermionic mode behavior.

## Contribution

It offers new lattice QCD computations of meson correlators and screening masses at finite temperature, exploring the $U_A(1)$ symmetry and low-lying fermionic modes.

## Key findings

- Flavor singlet meson correlators show signs of $U_A(1)$$ symmetry restoration at high T.
- Screening masses indicate changes in meson properties with temperature.
- Results suggest a link between low-lying fermionic modes and axial anomaly effects.

## Abstract

We compute the flavor singlet meson correlators and screening masses in quenched and $N_f=2$ QCD at $N_t=8$. The consequences of our results for the realization of the $U_A(1)$ symmetry at finite T are discussed and an interpretation of our measurements in terms of the behaviour of the low lying fermionic modes is proposed.