Further study of the finite-temperature chiral phase transition of two-flavor lattice QCD at a small quark mass

A previous finite-size study for the chiral phase transition of two-flavor QCD is extended to a smaller quark mass of $m_q=0.0125\mathrm{}$ in lattice units. The characteristics of the system for lattice sizes ($6^3$ - ${12}^3$) × 4 are found to be quite similar to those for $m_q=0.0025\mathrm{}$. The increase of susceptibilities over this range of the spatial size is still too mild to discriminate among the order of the transition also at this small quark mass.