Axial U(1) symmetry at high temperatures in $N_f=2+1$ lattice QCD with chiral fermions

Abstract

We study the $U(1{)}_A$ anomaly in the high-temperature phase of $N_f=2+1$ lattice QCD with chiral fermions. Gauge ensembles are generated with Möbius domain-wall (MDW) fermions, and in the measurements the determinant is reweighted to that of overlap fermions. We report the results for the overlap Dirac spectrum, $U(1{)}_A$ susceptibility, and topological susceptibility at $T=204$ and $175$ MeV.

Comments: 7 pages, 4 figures, 1 table; Proceedings of 38th International Symposium on Lattice Field Theory (LATTICE2021), 26-30 July 2021, Zoom/Gather@MIT, USA