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The equation of state for two flavor QCD at finite density

✍ Scribed by S. Ejiri; C.R. Allton; S.J. Hands; O. Kaczmarek; F. Karsch; E. Laermann; C. Schmidt

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
282 KB
Volume
129-130
Category
Article
ISSN
0920-5632

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✦ Synopsis

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 pCimproved staggered fermions. Derivatives of In 2 with respect to quark chemical potential pL4 up to fourth order are calculated, enabling estimates of the pressure, quark number density and associated susceptibilities as functions of pL4 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 pa is increased. This suggests the presence of a critical endpoint in the (T, pq) plane.

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