Extended Nambu--Jona-Lasinio model with eight quark interactions
  We review the effect on vacuum properties and magnetic catalysis, of adding the most general 0-spin 8-quark (8q) interactions to the combined SU(3) flavor Nambu--Jona-Lasinio (NJL) and 6-quark (6q) 't Hooft interaction Lagrangian. 
B. Hiller, A. A. Osipov, A. H. Blin, J. Providencia
hep-ph