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Article Dans Une Revue Physics Letters B Année : 2016

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

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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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hal-01250179 , version 1 (04-01-2016)

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Matteo Cacciari, Luigi del Debbio, José R. Espinosa, Antonio D. Polosa, Massimo Testa. A note on the fate of the Landau–Yang theorem in non-Abelian gauge theories. Physics Letters B, 2016, 753 (10), pp. 476-481. ⟨10.1016/j.physletb.2015.12.053⟩. ⟨hal-01250179⟩
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