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
File in questo prodotto:
File Dimensione Formato  
PhysRevD.98.054510.pdf

accesso aperto

Tipologia: Versione finale editoriale
Licenza: Creative commons
Dimensione 619.09 kB
Formato Adobe PDF
619.09 kB Adobe PDF Visualizza/Apri
1805.02960.pdf

accesso aperto

Tipologia: Documento in Pre-print
Licenza: Creative commons
Dimensione 744.92 kB
Formato Adobe PDF
744.92 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/941697
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 82
  • ???jsp.display-item.citation.isi??? 70
social impact