Journal
PHYSICAL REVIEW D
Volume 67, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.67.014505
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We study QCD at nonzero temperature and baryon density in the framework of the analytic continuation from an imaginary chemical potential. We carry out simulations of QCD with four flavors of staggered fermions, and reconstruct the phase diagram in the temperature-imaginary mu plane. We consider Ansatze 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)similar or equal to500 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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