Thermodynamics at nonzero baryon number density: a comparison of lattice and hadron resonance gas model calculations
Abstract
We compare recent lattice studies of QCD thermodynamics at nonzero quark chemical potential with the thermodynamics of a hadron resonance gas. We argue that for T⩽T_{c} the equation of state derived from Monte Carlo simulations of two flavour QCD at nonzero 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.
 Publication:

Physics Letters B
 Pub Date:
 October 2003
 DOI:
 10.1016/j.physletb.2003.08.001
 arXiv:
 arXiv:hepph/0306208
 Bibcode:
 2003PhLB..571...67K
 Keywords:

 High Energy Physics  Phenomenology;
 High Energy Physics  Lattice;
 Nuclear Theory
 EPrint:
 15 pages, LaTex2e, 6 EPSfigures, minor corrections, reference added