Abstract
Using an on shell gauge invariant formulation of relativistic dynamics I study the interaction vertices for a massive spin Dirac field propagating in (anti–)de Sitter [(A)dS] space of dimension greater than or equal to four. The gravitational interaction vertex for the massive spin field and all cubic vertices for the massive spin field and massless spin 2 field with two and three derivatives are obtained. In dimension greater than four, I demonstrate that the gravitational vertex of the massive spin field involves, in addition to the standard minimal gravitational vertex, contributions with two and three derivatives. I find that for the massive spin and massless spin 2 fields one can build two higher-derivative vertices with two and three derivatives. Limits of massless and partial massless spin fields in (A)dS space and limits of massive and massless spin fields in flat space are discussed.
- Received 11 September 2007
DOI:https://doi.org/10.1103/PhysRevD.77.025032
©2008 American Physical Society