N=2 SUPERSYMMETRY OF HIGHER SUPERSPIN MASSLESS THEORIES

We present N=2 supersymmetry transformations, both in N=1, D=4 Minkows ki and anti-de Sitter superspaces, for higher superspin massless theor ies. It is noted that the existence of dual versions of massless super multiplets with arbitrary superspin s may provide a basis for understa nding duality in N=1, D=4 superstring theory. We further conjecture th at the N=1, D=4 supergravity pre-potential together with all higher su perspin s pre-potentials are components of an N=1,D=4 superstring pre- potential. (C) 1997 Elsevier Science B.V.