Es. Fradkin et Rr. Metsaev, CUBIC SCATTERING-AMPLITUDES FOR ALL MASSLESS REPRESENTATIONS OF THE POINCARE GROUP IN ANY SPACE-TIME DIMENSION, Physical review. D. Particles and fields, 52(8), 1995, pp. 4660-4667
Using the language of highest weight representations and the light con
e formalism we construct a full list of cubic amplitudes of scattering
for all bosonic massless representations of the Poincare group in any
even space-time dimension.