NNLO HTLpt predictions for the curvature of the QCD phase transition line

Abstract

We present predictions for the second- and fourth-order curvature coefficients of the QCD phase transition line using the NNLO HTLpt-resummed thermodynamic potential. We present three cases corresponding to (i) $\mu_s = \mu_l = \mu_B/3$, (ii) $\mu_s=0$, $\mu_l = \mu_B/3,$ and (iii) $S = 0$, $Q/B = 0.4$, $\mu_l = \mu_B/3$. In all three cases, we find excellent agreement with continuum extrapolated lattice QCD results for $\kappa_2$, given current statistical uncertainties. We also make HTLpt predictions for $\kappa_4$ in all three cases, finding again excellent agreement with lattice extractions of this coefficient where available.