Colour Octet effects in Quarkonium Physics

Details Colour Octet effects in Quarkonium Physics Colour Octet effects in Quarkonium Physics

1998-09-04

arxiv.org/abs/hep-ph/9809260v1

Nucl.Phys.Proc.Suppl. 74 (1999) 235-238

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, Latex (espcrc2.sty), 1 figure. Talk presented at QCD'98, Montpellier, July 2-8, 1998; to appear in Nucl. Phys. B (Pro

Scientific paper

10.1016/S0920-5632(99)00170-X

The importance of including colour octet contributions in describing decay and production of quarkonium states is briefly discussed for two cases : the radiative decays of the $\Upsilon$ and the production of $J/\psi$ in the inclusive $B$ decays. It is shown how information on the non-perturbative matrix elements can be obtained by comparing the theoretical expressions computed at next-to-leading order in $\alpha_s$ with the experimental data.

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