Axial U(1) symmetry and mesonic correlators at high temperature in $N_f=2$ lattice QCD

Understand

We investigate the high-temperature phase of QCD using lattice QCD simulations with $N_f = 2$ dynamical M\"obius domain-wall fermions.

• On generated configurations, we study the axial $U(1)$ symmetry, overlap-Dirac spectra, screening masses from mesonic correlators, and topological susceptibility.
• We find that some of the observables are quite sensitive to lattice artifacts due to a small violation of the chiral symmetry.
• For those observables, we reweight the M\"obius domain-wall fermion determinant by that of the overlap fermion.