Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2001-08-06
Physics
High Energy Physics
High Energy Physics - Theory
Scientific paper
After a brief review of the celebrated 1941 paper of Rarita and Schwinger on the theory of particles with half-integral spins, we present an {\em ab initio} construct of the representation space relevant for the description of spin-3/2 particles. The chosen example case of spin-3/2 shows that covariance of a wave equation, and that of the imposed supplementary conditions, alone is not a sufficient criterion to guarantee the compatibility of a framework with relativity -- a lesson already arrived by Velo and Zwanziger. Here this same lesson is shown to be true at the level of the representation space without invoking any interactions. The presented detailed analysis forces us to abandon the single-spin interpretation of the Rarita and Schwinger framework, and suggests a new interpretation that fully respects the relativity theory.
Ahluwalia Dharam V.
Kirchbach Mariana
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