Numerical study of the equation of state for two flavor QCD at finite density

Details Numerical study of the equation of state for two flavor QCD at finite density Numerical study of the equation of state for two flavor QCD at finite density

2003-09-30

arxiv.org/abs/hep-lat/0309188v2

Physics

High Energy Physics

High Energy Physics - Lattice

5 pages, 4 figures, Talk at Confinement 2003

Scientific paper

We discuss the equation of state for 2 flavor QCD at non-zero temperature and density. Derivatives of $\ln Z$ with respect to 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 a Taylor series expansion. It is found that the fluctuations in the quark number density increase in the vicinity of the phase transition temperature and the susceptibilities start to develop a pronounced peak as $\mu_q$ is increased. This suggests the presence of a critical endpoint in the $(T, \mu_q)$ plane.

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