A note on the fate of the Landau–Yang theorem in non-Abelian gauge theories
Physics Letters B(2016)
Abstract
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.
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Key words
gauge theories,landau–yang,non-abelian
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