The curvature of the chiral pseudocritical line from LQCD: analytic continuation and Taylor expansion compared

Abstract

We present a determination of the curvature $\kappa$ of the chiral pseudocritical line from $N_f=2+1$ lattice QCD at the physical point obtained by adopting the Taylor expansion approach. Numerical simulations performed at three lattice spacings lead to a continuum extrapolated curvature $\kappa =0.0145(25)$, a value that is in excellent agreement with continuum limit estimates obtained via analytic continuation within the same discretization scheme, $\kappa =0.0135(20)$. The agreement between the two calculations is a solid consistency check for both methods.

arXiv commentQuark Matter 2018

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• Chiral spin symmetry and hot/dense QCD
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• The BEST framework for the search for the QCD critical point and the chiral magnetic effect