D-brane construction for non-Abelian walls

Supersymmetric U(N{sub C}) gauge theory with N{sub F} massive hypermultiplets in the fundamental representation is given by the brane configuration made of N{sub C} fractional Dp-branes stuck at the Z{sub 2} orbifold singularity on N{sub F} separated D(p+4)-branes. We show that non-Abelian walls in this theory are realized as kinky fractional Dp-branes interpolating between D(p+4)-branes. Wall solutions and their duality between N{sub C} and N{sub F}-N{sub C} imply extensions of the s-rule and the Hanany-Witten effect in brane dynamics. We also find that the reconnection of fractional D-branes occurs in this system. Diverse phenomena in non-Abelian walls found in field theory can be understood very easily by this brane configuration.