Junctions of mass-deformed nonlinear sigma models on the Grassmann manifold
Junctions of mass-deformed nonlinear sigma models on the Grassmann manifold
We study vacua and walls of the mass-deformed nonlinear sigma model on the Grassmann manifold $G_{N_F,N_C}=\frac{SU(N_F)}{SU(N_C)\times SU(N_F-N_C)\times U(1)}$ and discuss three-pronged junctions for $N_C=1,2,3$ in four dimensions.