Junctions of mass-deformed nonlinear sigma models on the Grassmann manifold

We study vacua and walls of the mass-deformed nonlinear sigma models on the Grassmann manifold $$ {G}_{N_F}{N}_C=\frac{G_{N_F},\left({N}_F\right)}{SU\ \left({N}_C\right)\times SU\ \left({N}_F-{N}_C\right)\times U(1)} $$ and discuss three-pronged junctions for NC = 1, 2, 3 in four dimensions.