We provide the most accurate results for the QCD transition line so far. We optimize the definition of the crossover temperature Tc, allowing for its very precise determination, and extrapolate from imaginary chemical potential up to real μB≈300 MeV. The definition of Tc adopted in this work is based on the observation that the chiral susceptibility as a function of the condensate is an almost universal curve at zero and imaginary μB. We obtain the parameters κ2=0.0153(18) and κ4=0.00032(67) as a continuum extrapolation based on Nt=10, 12, 16 lattices with physical quark masses. We also extrapolate the peak value of the chiral susceptibility and the width of the chiral transition along the crossover line. In fact, both of these are consistent with a constant function of μB. We see no sign of criticality in the explored range.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)