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On the interaction of spin 3/2 particles

V. Pascalutsa
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Abstract

Lagrangian of a massive particle with spin 3/2 is considered in the Rarita-Schwinger formalism. We discuss implications of the contact- and the gauge-transformation on the physical content of free and interacting theories. It is shown that the ``contact-invariance'' is trivial and has no physical relevance. The requirement of the gauge-invariance of the free lagrangian fixes the off-shell lower-spin content of the spin-3/2 field. The gauge-invariance of the interaction lagrangian insures that these lower-spin components are not coupled, and (probably always) leads to theories consistent with local causality.

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V. Pascalutsa. 1996-07-09. On the interaction of spin 3/2 particles. https://arxiv.org/abs/hep-ph/9412321

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