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Color-octet J/ψ production in the Y decay
Journal article

Color-octet J/ψ production in the Y decay

Kingman Cheung, Wai-Yee Keung and Tzu Chiang Yuan
Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol.54(1 PART 2), pp.929-937
07/1996

Abstract

Mathematical Physics Physics and Astronomy (all) Nuclear and High Energy Physics Physics and Astronomy (miscellaneous)
The direct production rate of ψ in the Y decay is shown to be dominated by the process Y→ggg* followed by g*→ψ via the color-octet mechanism proposed recently to explain the anomalous prompt charmonium production at the Fermilab Tevatron. We show that this plausibly dominant process has a branching ratio compatible with the experimental data. Further experimental study in this channel is important to test the significance of the color-octet component of the cc̄ pair inside the ψ system.

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