Correspondence of consistent and inconsistent spin-3/2 couplings via the equivalence theorem

Details Correspondence of consistent and inconsistent spin-3/2 couplings via the equivalence theorem Correspondence of consistent and inconsistent spin-3/2 couplings via the equivalence theorem

2000-08-03

arxiv.org/abs/hep-ph/0008026v2

Phys.Lett. B503 (2001) 85-90

Physics

High Energy Physics

High Energy Physics - Phenomenology

RevTeX, 10 pages, 2 figures; text and references substantially revised, formulae unchanged

Scientific paper

10.1016/S0370-2693(01)00140-X

The Rarita-Schwinger theory of free massive spin-3/2 field obeys the physical degrees of freedom counting, and one can distinguish ``consistent'' couplings which maintain this property and ``inconsistent'' couplings which destroy it. We show how one can obtain consistent couplings from inconsistent ones by a redefinition of the spin-3/2 field. The field redefinition gives rise to additional ``contact terms'' which, via the equivalence theorem, can be associated with the contribution of the extra lower-spin degrees of freedom involved by the inconsistent coupling.

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