FEYNMAN-RULES IN N=2 PROJECTIVE SUPERSPACE - (I) - MASSLESS HYPERMULTIPLETS

Manifestly N = 2 supersymmetric Feynman rules are found for different off-shell realizations of the massless hypermultiplet in projective su perspace. When we reduce the Feynman rules to an N = 1 superspace we o btain the correct component propagators. The Feynman rules are shown t o be compatible with a ''duality'' that acts only on the auxiliary fie lds, as well as with the usual duality relating the hypermultiplet to the tensor multiplet. (C) 1998 Elsevier Science B.V.