We determine the curvature of the pseudocritical line of Nf=2+1 QCD with physical quark masses via Taylor expansion in the quark chemical potentials. We adopt a discretization based on stout improved staggered fermions and the tree level Symanzik gauge action; the location of the pseudocritical temperature is based on chiral symmetry restoration. Simulations are performed on lattices with different temporal extent (Nt=6, 8, 10), leading to a continuum extrapolated curvature κ=0.0145(25), which is in very good agreement with the continuum extrapolation obtained via analytic continuation and the same discretization, κ=0.0135(20). This result eliminates the possible tension emerging when comparing analytic continuation with earlier results obtained via Taylor expansion.

Curvature of the pseudocritical line in QCD: Taylor expansion matches analytic continuation

Bonati, Claudio;D'Elia, Massimo;
2018-01-01

Abstract

We determine the curvature of the pseudocritical line of Nf=2+1 QCD with physical quark masses via Taylor expansion in the quark chemical potentials. We adopt a discretization based on stout improved staggered fermions and the tree level Symanzik gauge action; the location of the pseudocritical temperature is based on chiral symmetry restoration. Simulations are performed on lattices with different temporal extent (Nt=6, 8, 10), leading to a continuum extrapolated curvature κ=0.0145(25), which is in very good agreement with the continuum extrapolation obtained via analytic continuation and the same discretization, κ=0.0135(20). This result eliminates the possible tension emerging when comparing analytic continuation with earlier results obtained via Taylor expansion.
2018
Bonati, Claudio; D'Elia, Massimo; Negro, Francesco; Sanfilippo, Francesco; Zambello, Kevin
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/941697
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