The QCD pseudocritical line from imaginary chemical potentials

We determine the curvature of the chiral pseudocritical line of strong interactions by analytic continuation from imaginary chemical potentials. We consider Nf = 2+1 QCD discretized with stout improved staggered fermions, the tree level Symanzik gauge action and physical quark masses. We explore two different lattice spacings corresponding to temporal extensions Nt = 6 and Nt = 8, obtaining a preliminary continuum extrapolation for the curvature k = 0:013(2)(1). Our results also suggests that the inclusion of a non-zero strange quark chemical potential does not lead to significant correction on k.