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The equation of state for two flavor QCD at finite density / S. Ejiri, E. Laermann, F. Karsch, C. Schmidt, S.J. Hands, O. Kaczmarek, Chris Allton

Nuclear Physics B - Proceedings Supplements, Volume: 129-130, Pages: 545 - 547

Swansea University Author: Chris Allton

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Abstract

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 estima...

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Published in: Nuclear Physics B - Proceedings Supplements
ISSN: 09205632
Published: 2004
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa28432
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Abstract: 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.
College: College of Science
Start Page: 545
End Page: 547