TY - JOUR
T1 - QCD equation of state at nonzero chemical potential
T2 - Continuum results with physical quark masses at order μ 2
AU - Borsányi, Sz
AU - Endrodi, G.
AU - Fodor, Z.
AU - Katz, S. D.
AU - Krieg, S.
AU - Ratti, C.
AU - Szabó, K. K.
PY - 2012
Y1 - 2012
N2 - We determine the equation of state of QCD for nonzero chemical potentials via a Taylor expansion of the pressure. The results are obtained for Nf = 2 + 1 flavors of quarks with physical masses, on various lattice spacings. We present results for the pressure, interaction measure, energy density, entropy density, and the speed of sound for small chemical potentials. At low temperatures we compare our results with the Hadron Resonance Gas model. We also express our observables along trajectories of constant entropy over particle number. A simple parameterization is given (the Matlab/Octave script parameterization.m, submitted to the arXiv along with the paper), which can be used to reconstruct the observables as functions of T and μ , or as functions of T and S/N.
AB - We determine the equation of state of QCD for nonzero chemical potentials via a Taylor expansion of the pressure. The results are obtained for Nf = 2 + 1 flavors of quarks with physical masses, on various lattice spacings. We present results for the pressure, interaction measure, energy density, entropy density, and the speed of sound for small chemical potentials. At low temperatures we compare our results with the Hadron Resonance Gas model. We also express our observables along trajectories of constant entropy over particle number. A simple parameterization is given (the Matlab/Octave script parameterization.m, submitted to the arXiv along with the paper), which can be used to reconstruct the observables as functions of T and μ , or as functions of T and S/N.
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U2 - 10.1007/JHEP08(2012)053
DO - 10.1007/JHEP08(2012)053
M3 - Article
AN - SCOPUS:84865259392
SN - 1126-6708
VL - 2012
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 8
M1 - 53
ER -