QCD Thermodynamics with Domain Wall Fermions

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We present our recent studies of the pseudo-critical temperature, Tc, of QCD using domain wall fermions. Domain wall fermions have the advantage that they preserve exact SU(2) chiral symmetry at finite lattice spacing in the limit that Lₛ → ∞. The RBC Collaboration has performed a set of dynamical calculations at Lₛ = 32 and Nₜ = 8 using the Iwasaki gauge action with two light quarks (mₗ a = 0.003) and one strange quark (mₛ a = 0.037). A clear signal for the crossover transition can be seen in the light chiral susceptibility, as well as in the Wilson line. However, at Lₛ = 32, the residual chiral symmetry breaking is not yet fully under control. We also present preliminary results from the HotQCD Collaboration with Nₜ = 8 and Lₛ = 96, where the effects of the residual chiral symmetry breaking are reduced compared to Lₛ = 32.