A note on the fate of the Landau-Yang theorem in non-Abelian gauge theories

Matteo Cacciari, Luigi Del Debbio, José R. Espinosa, Antonio D. Polosa, Massimo Testa

Research output: Contribution to journalArticlepeer-review


Using elementary considerations of Lorentz invariance, Bose symmetry and BRST invariance, we argue why the decay of a massive color-octet vector state into a pair of on-shell massless gluons is possible in a non-Abelian SU(N) Yang-Mills theory, we constrain the form of the amplitude of the process and offer a simple understanding of these results in terms of effective-action operators.
Original languageUndefined/Unknown
JournalPhysics Letters B
Publication statusPublished - 21 Dec 2015


  • hep-ph
  • hep-th

Cite this