Soliton with a Pion Field in the Global Color Symmetry Model
  We calculate the property of the global color symmetry model soliton with the pion field being included explicitly. The calculated results indicate that the pion field provides a strong attraction so that the eigen-energy of a quark and the mass of a soliton reduce drastically, in contrast to those with only the sigma field. 
Bin Wang, Hui-chao Song, Lei Chang, Huan Chen, and Yu-xin Liu