Finite density QCD via imaginary chemical potential

Details Finite density QCD via imaginary chemical potential Finite density QCD via imaginary chemical potential

2002-09-21

arxiv.org/abs/hep-lat/0209146v2

Phys.Rev. D67 (2003) 014505

Physics

High Energy Physics

High Energy Physics - Lattice

27 pages, 10 figures, comments and references added

Scientific paper

10.1103/PhysRevD.67.014505

We study QCD at nonzero temperature and baryon density in the framework of the analytic continuation from imaginary chemical potential. We carry out simulations of QCD with four flavor of staggered fermions, and reconstruct the phase diagram in the temperature-imaginary \mu plane. We consider ans\"atze for the analytic continuation of the critical line and other observables motivated both by theoretical considerations and mean field calculations in four fermion models and random matrix theory. We determine the critical line, and the analytic continuation of the chiral condensate, up to \mu_B approx. 500 MeV. The results are in qualitative agreement with the predictions of model field theories, and consistent with a first order chiral transition. The correlation between the chiral transition and the deconfinement transition observed at \mu=0 persists at nonzero density.

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