Bochum 1998 – scientific programme

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HK: Hadronen und Kerne

HK 33: Structure of Baryons, Mesons V, Theory

HK 33.7: Talk

Tuesday, March 17, 1998, 16:00–16:15, J

Colour Octet Contribution in Exclusive P-wave Charmonium Decay into Baryon-Antibaryon — •Stephen Wong and P. Kroll — Fachbereich Physik, Universit"at Wuppertal, D-42097 Wuppertal

We show that colour octet contribution in exclusive P-wave quarkonium decay is necessary for consistency even though they are not needed to cancel any infrared divergence unlike in the inclusive case. We show that explicitly by calculating in the self-consistent perturbative scheme, the modified hard scattering approach, that colour singlet is clearly insufficient to explain the experimental data and colour octet must be included to have a reasonable agreement with data.