Quark Mass and Flavour Dependence of the QCD Phase Transition

By F. Karsch, E. Laermann, A. Peikert. 2000

364 citations recorded by the source corpus.

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 mps. 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-tau = 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) less than or equal to 800 MeV and screening sets in at distances r similar or equal to 0.3 fm. (C) 2001 Elsevier Science B.V. All rights reserved.

Subfields: Condensed Matter Physics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/0055adf1effe80ce50e6e7dbfd3fdda1ee7b7e30

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Citations in the corpus

The QCD phase diagram for external magnetic fields (2011, methodology): “Second, the present study uses Nf = 2 + 1 flavors as opposed to the Nf = 2 of [37], and the pseudocritical temperature is known to depend on the number of flavors [57], which may also introduce systematic differences in the dependence on the external field.”
The equation of state in lattice QCD: with physical quark masses towards the continuum limit (2005, background): “The horizontal blue line corresponds to the physical value of (mπ/Tc) (2), where Tc = 173MeV was assumed [21].”
Heavy quarkonium in extreme conditions (2019, methodology): “[127, 128, 129, 130, 131, 132] in SU (3) pure gauge in [133, 134, 135, 136, 137, 138, 139] and dynamical QCD with Nf = 2 in [140, 141, 142, 143, 144, 145, 146] and Nf = 3 in [147].”
Lattice QCD at High Temperature and Density (2001, methodology): “4 where we compare results from calculations in the pure gauge theory [20] with results from a calculation in three flavour QCD [19].”
theta dependence of SU(N) gauge theories in the presence of a topological term (2007, result): “[20, 81, 200,235,346,355,356], but this issue is still controversial.”