Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-12-27
Phys.Rev.D77:025032,2008
Physics
High Energy Physics
High Energy Physics - Theory
51 pages, LaTeX-2e, v3: Section 1 is divided into Sections 1-6. Discussion of gravitational and higher-derivative vertices add
Scientific paper
10.1103/PhysRevD.77.025032
Using on-shell gauge invariant formulation of relativistic dynamics we study interaction vertices for a massive spin 5/2 Dirac field propagating in (A)dS space of dimension greater than or equal to four. Gravitational interaction vertex for the massive spin 5/2 field and all cubic vertices for the massive spin 5/2 field and massless spin 2 field with two and three derivatives are obtained. In dimension greater that four, we demonstrate that the gravitational vertex of the massive spin 5/2 field involves, in addition to the standard minimal gravitational vertex, contributions with two and three derivatives. We find that for the massive spin 5/2 and massless spin 2 fields one can build two higher-derivative vertices with two and three derivatives. Limits of massless and partial massless spin 5/2 fields in (A)dS space and limits of massive and massless spin 5/2 fields in flat space are discussed.
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