Interacting massive and massless arbitrary spin fields in 4d flat space
Abstract
Massive and massless arbitrary integer spin fields propagating in fourdimensional flat space are studied. The massive and massless fields are treated by using a lightcone gauge helicity basis formalism. Cubic crossinteractions between massive and massless fields and cubic interactions between massive fields are investigated. We introduce a classification of such cubic interactions and using our classification we build all cubic interaction vertices. Realization of generators of the Poincaré algebra on space of interacting fields is found. As a byproduct, some illustrative examples of lightcone form for 3point invariant amplitudes of massive and massless fields are also discussed.
 Publication:

Nuclear Physics B
 Pub Date:
 November 2022
 DOI:
 10.1016/j.nuclphysb.2022.115978
 arXiv:
 arXiv:2206.13268
 Bibcode:
 2022NuPhB.98415978M
 Keywords:

 High Energy Physics  Theory
 EPrint:
 43 pages, v2: Brief comments on numbers of cubic vertices in Secs.711 added. Typos corrected. References added