Chiral Phase Transition Temperature in ()-Flavor QCD
H.T. Ding (Key Laboratory of Quark & Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China); P. Hegde (Center for High Energy Physics, Indian Institute of Science, Bangalore 560012, India); O. Kaczmarek (Key Laboratory of Quark & Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China, Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany); F. Karsch (Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA, Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany); Anirban Lahiri (Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany); et al - Show all 11 authors
We present a lattice-QCD-based determination of the chiral phase transition temperature in QCD with two degenerate, massless quarks and a physical strange quark mass using lattice QCD calculations with the highly improved staggered quarks action. We propose and calculate two novel estimators for the chiral transition temperature for several values of the light quark masses, corresponding to Goldstone pion masses in the range of . The chiral phase transition temperature is determined by extrapolating to vanishing pion mass using universal scaling analysis. Finite-volume effects are controlled by extrapolating to the thermodynamic limit using spatial lattice extents in the range of 2.8–4.5 times the inverse of the pion mass. Continuum extrapolations are carried out by using three different values of the lattice cutoff, corresponding to lattices with temporal extents , 8, and 12. After thermodynamic, continuum, and chiral extrapolations, we find the chiral phase transition temperature .
