Axial U(1) symmetry in high temperature phase of two-flavor QCD

Suzuki, Kei   

In this talk, using lattice QCD simulations with dynamical fermions by JLQCD Collaboration, I will show our recent results of the observables in the high-temperature phase in which the chiral symmetry is restored, such as the axial symmetry, topological charge, Dirac eigenvalue spectra, meson correlators, and screening masses. Our gauge ensembles are generated with Moebius domain-wall fermions, but the measurements such as susceptibilities are reweighted to those for the overlap fermions by using overlap/domain-wall reweighting technique. We find that the and topological susceptibilities are strongly suppressed in the small quark mass region. We will also discuss the relation between the susceptibilities and meson correlators.