Journal
PHYSICAL REVIEW D
Volume 68, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.68.014507
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We present results of a simulation of QCD on a 16(3)x4 lattice with 2 continuum flavors of a p4-improved staggered fermion with mass m/T = 0.4. Derivatives of the thermodynamic grand potential Omega with respect to the quark chemical potential mu(q) up to fourth order are calculated, enabling estimates of the pressure, quark number density and associated susceptibilities as functions of mu(q) via Taylor series expansion. Discretization effects associated with various staggered fermion formulations are discussed in some detail. In addition it is possible to estimate the radius of convergence of the expansion as a function of temperature. We also discuss the calculation of energy and entropy densities which are defined via mixed derivatives of Omega with respect to the bare couplings and quark masses.
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