Domain Walls with Massive Hypermultiplets
  Massive hypermultiplets admit degenerate discrete vacua only if they form nonlinear sigma models or have gauge interaction. We discuss BPS domain walls in these theories. This talk is based on the original papers hep-th/0307274 and hep-th/0211103. 
Masato Arai, Muneto Nitta, Norisuke Sakai