Soliton-skyrmion in the extended chiral group EΧ including diquark parameters

We consider the extended chiral group Eχ and investigate whether solitons-skyrmions can be formed by the chiral field with diquark parameters in the symplectic subgroup of Eχ. We find that isolated solitons (i.e., solitons in the gluonic vacuum) can be stable in the chromomagnetic vacuum and their topological charge starts from ±4/3.