Massive and massless spin-1 particles with gauge symmetry without Stueckelberg fields
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In order to generate mass for an abelian spin-1 vector field while preserving gauge invariance we couple it to a symmetric tensor. The derivative coupling includes up to three derivatives. We show that unitarity, causality and absence of Stueckelberg (compensating) fields single out a unique model up to trivial field redefinitions. The model contains one massive and one massless spin-1 particle. It is shown by means of a master action to be dual to the direct sum of a Maxwell plus a Maxwell–Proca theory.
KeywordsVector Field Ghost Symmetric Tensor Antisymmetric Tensor Derivative Coupling
We thank Alvaro de S. Dutra for helpful discussions. This work is partially supported by CNPq.
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