10.1016/S0920-5632(03)02636-7
Ejiri, S.
S.
Ejiri
Allton, C. R
C. R
Allton
Hands, S. J
S. J
Hands
Kaczmarek, Olaf
Olaf
Kaczmarek
Karsch, Frithjof
Frithjof
Karsch
Laermann, Edwin
Edwin
Laermann
Schmidt, Christian
Christian
Schmidt
The Equation of state for two flavor QCD at finite density
2004
2011-01-19T16:18:30Z
2018-07-24T12:57:57Z
conference
https://pub.uni-bielefeld.de/record/1968871
https://pub.uni-bielefeld.de/record/1968871.json
We discuss the equation of state for QCD at non-zero temperature and density. We present results of a simulation for QCD with 2 flavors of p4-improved staggered fermions. Derivatives of $\ln {\cal Z}$ 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. We also discuss the radius of convergence of the expansion as a function of temperature. 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.