Phase diagram of the three-dimensional NJL model
Department of Physics, University of Wales Swansea, Singleton Park, SA2 8PP, Swansea, UK
* e-mail: C.G.Strouthos@swansea.ac.uk
With the exception of confinement the three-dimensional Nambu-Jona-Lasinio (NJL3) model incorporates many of the essential properties of QCD. We discuss the critical properties of the model at non-zero temperature T and/or non-zero chemical potential μ. We show that the universality class of the thermal transition is that of the d = 2 classical spin model with the same symmetry. We provide evidence for the existence of a tricritical point in the -plane. We also discuss numerical results by Handset al. which showed that the system is critical for and the diquark condensate is zero.
© Società Italiana di Fisica and Springer-Verlag, 2003