New class of Proca interactions
arXiv:2003.13773 · doi:10.1103/PhysRevD.102.083508
Abstract
We propose a new class of Proca interactions that enjoy a non-trivial constraint and hence propagates the correct number of degrees of freedom for a healthy massive spin-1 field. We show that the scattering amplitudes always differ from those of the Generalized Proca. This implies that the new class of interactions proposed here are genuinely different from the Generalized Proca and there can be no local field redefinitions between the two. In curved spacetime, massive gravity is the natural covariantization but we show how other classes of covariantizations can be considered.
arXiv comment28 pages, 1 figure Version published in Physical Review D. The title has been changed to match the one of prd
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