Simón Bolívar

We classify all massive irreducible representations of super Poincaré in D = 10. New Casimir operators of super Poincaré are presented whose eigenvalues completely specify the representation. It is shown that a scalar superfield contains three irreducible representations of massive supersymmetry and we find the corresponding superprojectors. We apply these new tools to the quantization of the massive superparticle and we show that it must be formulated in terms of a superfield B µν satisfying an adequate covariant restriction.