The QCD deconfinement critical point for Nf = 2 flavors of staggered fermions

  • Quenched QCD at zero baryonic chemical potential undergoes a first-order deconfinement phase transition at a critical temperature Tc, which is related to the spontaneous breaking of the global center symmetry. Including heavy, dynamical quarks breaks the center symmetry explicitly and weakens the first-order phase transition. For decreasing quark masses the first-order phase transition turns into a smooth crossover at a Z2-critical point. The critical quark mass corresponding to this point has been examined with Nf=2 Wilson fermions for several Nτ in a recent study within our group. For comparison, we also locate the critical point with Nf=2 staggered fermions on Nτ=8 lattices. For this purpose we perform Monte Carlo simulations for several quark mass values and various aspect ratios in order to extrapolate to the thermodynamic limit. The critical mass is obtained by fitting to a finite size scaling formula of the kurtosis of the Polyakov loop. Our results indicate large discretization effects, requiring simulations on lattices with Nτ>8.

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Author:Reinhold KaiserORCiD, Owe PhilipsenORCiDGND, Alessandro SciarraORCiD
ArXiv Id:
Document Type:Conference Proceeding
Date of Publication (online):2021/12/16
Date of first Publication:2021/12/16
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Contributing Corporation:International Symposium on Lattice Field Theory (38. : 2021 : Online)
Release Date:2023/01/20
Page Number:8
Institutes:Physik / Physik
Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS)
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoCreative Commons - Namensnennung-Nicht kommerziell - Keine Bearbeitung 4.0