Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-06-23
Phys.Lett. B571 (2003) 67-74
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages, LaTex2e, 6 EPS-figures, minor corrections, reference added
Scientific paper
10.1016/j.physletb.2003.08.001
We compare recent lattice studies of QCD thermodynamics at non-zero quark chemical potential with the thermodynamics of a hadron resonance gas. We argue that for T < Tc the equation of state derived from Monte--Carlo simulations of two flavour QCD at non-zero chemical potential can be well described by a hadron resonance gas when using the same set of approximations as used in current lattice calculations. We estimate the importance of truncation errors arising from the use of a Taylor expansion in terms of the quark chemical potential and examine the influence of unphysically large quark masses on the equation of state and the critical conditions for deconfinement.
Karsch Frithjof
Redlich Krzysztof
Tawfik A.
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