Axial U(1) symmetry at finite temperature with M\"obius domain-wall fermions

Understand

We investigate the axial $U(1)$ symmetry restoration at finite temperature in two flavor QCD.

• We employ the M\"obius domain-wall formalism that is designed to achieve good chiral symmetry.
• We show the measurements of a difference of meson susceptibilities, sensitive to the $U(1)_A$ symmetry breaking.
• The signal is dominated by zero and near-zero modes.