Evidence of effective axial U(1) symmetry restoration at high temperature QCD

Understand

We study the axial U(1) symmetry at finite temperature in two-flavor lattice QCD.

• Employing the Mobius domain-wall fermions, we generate gauge configurations slightly above the critical temperature Tc with different lattice sizes L = 2-4 fm.
• Our action allows frequent topology tunneling while keeping good chiral symmetry close enough to that of overlap fermions.
• This allows us to recover full chiral symmetry by an overlap/domain-wall reweighting.