Dynamical Symmetry Breaking in a Gauge Theory ``Thirring Model''
  Dynamical fermion mass generation is studied in the three-dimensional Thirring model reformulated as a gauge theory by introducing hidden local symmetry. The analysis by use of Schwinger-Dyson equation is shown to exhibit a critical behavior as the number $N$ of four-component fermions approaches $N_{\rm cr}=128/3\pi^{2}$. 
Taichi Itoh, Yoonbai Kim, Masaki Sugiura, Koichi Yamawaki