Superparticles in D > 11 Revisited
A model for n superparticles in (d − n, n) dimensions is proposed. In addition to target space supersymmetry that involves a product of n momentum generators, the action also has n(n + 1)/2 local bosonic symmetries and n local fermionic symmetries. The precise relation between this model and related ones in the literature is explained. We also present a new model for superparticles in arbitrary dimensions where coordinates are associated with all the p-form charges occuring in the superalgebra. The model naturally gives rise to the BPS condition for the charges.