Non-BPS walls and their stability in 5D supersymmetric theory Original Research Article

An exact solution of non-BPS multi-walls is found in supersymmetric massive image model in five dimensions. The non-BPS multi-wall solution is found to have no tachyon. Although it is only metastable under large fluctuations, we can give topological stability by considering a model with a double covering of the image target manifold. The image supersymmetry preserved on the four-dimensional world volume of one wall is broken by the coexistence of the other wall. The supersymmetry breaking is exponentially suppressed as the distance between the walls increases.