HYPERPARTICLES, TWISTORS AND ANY SPINS

Abstract

In this contribution I would like to review some topics in which Jerzy Lukierski has been one of the main players and contributed over decades with many interesting and important results. We shall consider various ways in which relativistic particles can be endowed with spin degrees of freedom with the use of twistor-like variables and supersymmetrization, which upon quantization lead either to higher-spin fields (in D > 3) or to anions (in D = 3).