Axial U(1) symmetry at high temperature in 2-flavor lattice QCD

2018 
We investigate the axial U (1)A symmetry breaking above the critical temperature in two-flavor lattice QCD. The ensembles are generated with dynamical Mobius domain-wall or reweighted overlap fermions. The U (1)A susceptibility is extracted from the low-modes spectrum of the overlap Dirac eigenvalues. We show the quark mass and temperature dependences of U (1)A susceptibility. Our results at T = 220MeV imply that the U (1)A symmetry is restored in the chiral limit. Its coincidence with vanishing topological susceptibility is observed.
    • Correction
    • Source
    • Cite
    • Save
    • Machine Reading By IdeaReader
    10
    References
    10
    Citations
    NaN
    KQI
    []