An effective way for determining the transition points in lattice QCD at finite temperature

The transition points of lattice quantum chromodynamics (QCD) with two degenerate flavors of Wilson quarks at finite temperature T and small imaginary quark chemical potential μ are determined by using the reweighting technique. Under the positive fermion determinant, i.e., the chemical potential is pure imaginary, the simulations are performed at hopping parameter κ = 0.165. The comparison between the reweighting technique and the conventional point-by-point scanning method is presented. The results prove that the reweighting technique is an effective and efficient method in investigating the critical phenomenon.