The Equation of state for two flavor QCD at finite density
Ejiri, S.
Allton, C. R
Hands, S. J
Kaczmarek, Olaf
Karsch, Frithjof
Laermann, Edwin
Schmidt, Christian
fermion number: density
fermion: lattice field theory
flavor: 2
finite temperature
gauge field theory: SU(3)
numerical calculations: Monte Carlo
pressure
susceptibility
talk: Tsukuba 2003/07/15
Taylor expansion
critical phenomena
density: finite
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.
2004
info:eu-repo/semantics/conferenceObject
doc-type:conferenceObject
text
https://pub.uni-bielefeld.de/record/1968871
Ejiri S, Allton CR, Hands SJ, et al. The Equation of state for two flavor QCD at finite density. <em>Nucl.Phys.Proc.Suppl.</em> 2004;129/130:545-547.
eng
info:eu-repo/semantics/altIdentifier/doi/10.1016/S0920-5632(03)02636-7
info:eu-repo/semantics/altIdentifier/issn/0920-5632
info:eu-repo/semantics/altIdentifier/wos/000220478100135
info:eu-repo/semantics/altIdentifier/arxiv/hep-lat/0309077
info:eu-repo/semantics/closedAccess