On the QCD Phase Transition at Finite Baryon Density

null null We investigate the QCD chiral phase transition at finite chemical potential null μ , using the renormalization group (RG) to characterize the infrared behavior of sigma models constrained by the flavor and spacetime symmetries. The results are similar to those obtained from RG analysis of the finite temperature transition at zero baryon density. When there are more than two massless flavors of quarks, a first order transition is...