The pressure in 2, 2+1 and 3 flavour QCD
Karsch, Frithjof
Laermann, Edwin
Peikert, A
We calculate the pressure in QCD with two and three light quarks on a lattice of size 16(3) X 4 using tree level improved gauge and fermion actions. We argue that, for temperatures T greater than or similar to 2T(c), systematic effects due to the finite lattice cut-off and non-vanishing quark masses are below 15% in this calculation and give an estimate for the continuum-extrapolated pressure in QCD with massless quarks. We find that the flavour dependence of the pressure is dominated by that of the Stefan-Boltzmann constant. Furthermore we perform a calculation of the pressure using two light (m(u,d)/T = 0.4) and one heavier quark (m(s)/T = 1). In this case the pressure is reduced with respect to that of 3-flavour QCD. This effect is stronger than expected from the mass dependence of an ideal Fermi gas. (C) 2000 Elsevier Science B.V. All rights reserved.
ELSEVIER SCIENCE BV
2000
info:eu-repo/semantics/article
doc-type:article
text
https://pub.uni-bielefeld.de/record/1620114
Karsch F, Laermann E, Peikert A. The pressure in 2, 2+1 and 3 flavour QCD. <em>PHYSICS LETTERS B</em>. 2000;478(4):447-455.
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/S0370-2693(00)00292-6
info:eu-repo/semantics/altIdentifier/issn/0370-2693
info:eu-repo/semantics/altIdentifier/wos/000086540700007
info:eu-repo/semantics/altIdentifier/arxiv/hep-lat/0002003
info:eu-repo/semantics/closedAccess