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

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.

7 pages. v2: typos corrected, one reference added

References in corpus (3)

• Breakdown of QCD Factorization for P-Wave Quarkonium Production at Low Transverse Momentum
• Dips at Colliders
• The angular momentum of two massless fields revisited

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