On the existence of the critical point in finite density lattice QCD

Details On the existence of the critical point in finite density lattice QCD On the existence of the critical point in finite density lattice QCD

2007-06-25

arxiv.org/abs/0706.3549v2

Phys.Rev.D77:014508,2008

Physics

High Energy Physics

High Energy Physics - Lattice

17 pages, 9 figures

Scientific paper

10.1103/PhysRevD.77.014508

We propose a method to probe the nature of phase transitions in lattice QCD at finite temperature and density, which is based on the investigation of an effective potential as a function of the average plaquette. We analyze data obtained in a simulation of two-flavor QCD using p4-improved staggered quarks with bare quark mass $m/T = 0.4$, and find that a first order phase transition line appears in the high density regime for $\mu_q/T \simge 2.5$. We also discuss the difference between the phase structures of QCD with non-zero quark chemical potential and non-zero isospin chemical potential.

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