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Linear equations of motion for massless particles of any spin in any even dimensional spaces

Bojan Gornik, N. Mankoc Borstnik

hep-tharXiv:hep-th/0102008

Abstract

It is proven that the Poincare symmetry determines equations of motion, which are for massless particles of any spin in d-dimensional spaces linear in the momentum. The proof is made only for even d and for fields with no gauge symmetry. We comment on a few examples. We pay attention only to spin degrees of freedom.

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