Quark mass and flavour dependence of the QCD phase transition

2000/12/20 by F. Karsch, E. Laermann, A. Peikert · 15 citations
Physics and Astronomy · #Deconfinement #Extrapolation #Flavour #High-Energy Particle Collisions Research #Meson #Nuclear physics #Particle physics #Phase transition #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #Scalar (mathematics) #Theoretical and Computational Physics #Thermodynamics #hep-lat #hep-ph #nucl-ex #nucl-th

paper · pdf · doi:10.1016/s0550-3213(01)00200-0

published as Nucl.Phys.B605:579-599,2001 · 25 pages, LaTeX2e File, 11 EPS-files

arxiv created 2000/12/20 · openalex publication_date 2001/07/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We analyze the quark mass and flavour dependence of the QCD phase transition temperature. When the lightest pseudo-scalar meson mass (m_PS) is larger than 2 GeV the critical temperature is controlled by the gluonic sector of QCD alone. For smaller values of the lightest meson mass the pseudo-critical temperature decreases slowly with m_PS. For a large regime of meson masses the pseudo-critical temperature of 2-flavour QCD is about 10% larger than in the 3-flavour case. On lattices with temporal extent N_t=4 an extrapolation to the chiral limit yields T_c = 173(8) MeV and 154(8) MeV for 2 and 3-flavour QCD, respectively. We also analyze dynamical quark mass effects on the screening of the heavy quark potential. A detailed analysis of the heavy quark free energy in 3-flavour QCD shows that close to T_c screening effects are approximately quark mass independent already for pseudo-scalar meson masses m_PS = 800 MeV and screening sets in at distances r = 0.3 fm.

Citations

• Phase structure of lattice QCD at finite temperature for 2+1 flavors of Kogut-Susskind quarks

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