Colour Octet Contribution in Exclusive Charmonium Decay into Baryon-Antibaryon

Details Colour Octet Contribution in Exclusive Charmonium Decay into Baryon-Antibaryon Colour Octet Contribution in Exclusive Charmonium Decay into Baryon-Antibaryon

1997-10-24

arxiv.org/abs/hep-ph/9710464v1

Proc. Prog. in Heavy Quarks Physics p.185

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, talk presented at the IVth International Workshop on Progess in Heavy Quark Physics, Rostock, Germany, Sept 97

Scientific paper

It is argued that colour octet contribution in exclusive charmonium decays is very important even though the same infrared divergence found in P-wave colour singlet inclusive decay is absent. This comes about because of the suppression at the level of the wavefunction of P-wave quarkonia. Using the modified hard scattering approach of Brodsky, Lepage, Botts, Li and Sterman, we use charmonium decay into baryon-antibaryon pair as an example and show that the colour singlet contribution alone is clearly insufficient to explain the experimental decay widths.

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