TY - CONF
AB - We discuss the phase structure and the equation of state for 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 for 2-flavor QCD, enabling estimates of the pressure, quark number density and associated susceptibilities as functions of $\mu_q$ via a Taylor series expansion. Also, the phase transition line for 2 and 3-flavor QCD and the critical endpoint in the $(T, \mu_q)$ plane are investigated in the low density regime.
AU - Ejiri, Shinji
AU - Allton, Chris R.
AU - Hands, Simon J.
AU - Kaczmarek, Olaf
AU - Karsch, Frithjof
AU - Laermann, Edwin
AU - Schmidt, Christian
ID - 1968835
KW - fermion: lattice field theory
KW - density: finite
KW - flavor: 2
KW - gauge field theory: SU(3)
KW - finite temperature
KW - flavor: 3
KW - Lattice
KW - critical phenomena
KW - numerical calculations: Monte Carlo
KW - pressure
KW - susceptibility: chiral
KW - talk: Nara 2003/07/10
SN - 0375-9687
T2 - Finite Density QCD: Proceedings of the International Workshop
TI - Study of QCD thermodynamics at finite density by Taylor expansion
VL - 153
ER -