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

Kei Suzuki, Sinya Aoki, Yasumichi Aoki, Guido Cossu, Hidenori Fukaya, Shoji Hashimoto, Christian Rohrhofer, JLQCD Collaboration
2020 Proceedings of 37th International Symposium on Lattice Field Theory — PoS(LATTICE2019)   unpublished
We investigate the high-temperature phase of QCD using lattice QCD simulations with N f = 2 dynamical Möbius 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 Möbius domainwall fermion determinant by
more » ... ion determinant by that of the overlap fermion. We also check the volume dependence of observables. Our data near the chiral limit indicates a strong suppression of the axial U(1) anomaly at temperatures ≥
doi:10.22323/1.363.0178 fatcat:7wn7fydvszgnjizpdpwzw2s6ye