REFLECTION MATRICES FOR INTEGRABLE N=1 SUPERSYMMETRIC THEORIES

We study two-dimensional integrable N = 1 supersymmetric theories (wit hout topological charges) in the presence of a boundary. We find a uni versal ratio between the reflection amplitudes for particles that are related by supersymmetry and we propose exact reflection matrices for the supersymmetric extensions of the multi-component Yang-Lee models a nd for the breather multiplets of the supersymmetric sine-Gordon theor y. We point out the connection between our reflection matrices and the classical boundary actions for the supersymmetric sine-Gordon theory as constructed by Inami, Odake and Zhang [Phys. Lett. B 359 (1995) 118 ].