Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-04-30
Phys.Rev. D68 (2003) 025022
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, 9 figures, RevTeX4; v2: references and 3 plots updated
Scientific paper
10.1103/PhysRevD.68.025022
Using quasiparticle models and imposing thermodynamic consistency, lattice data for the equation of state of deconfined QCD can be mapped to finite chemical potential. We consider a refinement of existing simple massive quasiparticle models using the non-local hard-thermal-loop (HTL) propagators, and certain NLO corrections thereof, to obtain the thermodynamic potential as a function of temperature and chemical potential. At small chemical potential we find that the results for the slope of constant pressure from our main model for 2 massless quark flavors is in good agreement with recent lattice data for 2+1 flavors while it deviates somewhat from lattice data for 2 flavors from another group. For zero temperature, we obtain an estimate for the critical chemical potential which is close to that obtained from simpler quasiparticle models.
Rebhan Anton
Romatschke Paul
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