QCD Critical Region and Quark Gluon Plasma from an Imaginary mu_B

Abstract

We discuss the imaginary chemical potential approach to the study of QCD at nonzero temperature and density, present results for the four flavor model in the different phases and show that this method is ideally suited for a comparison between lattice data and phenomenological models.

Comments: 3 pages, Lattice2003(nonzero); references added