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

作者：Cacciari Matteo; Del Debbio Luigi; Espinosa Jose R; Polosa Antonio D^*; Testa Massimo

来源：Physics Letters B, 2016, 753: 476-481.

DOI：10.1016/j.physletb.2015.12.053

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.

• 出版日期2016-2-10