Contribution of Colour-singlet Process ${\rm Y}\to J/\Psi +c\bar{c}g$ to ${\rm Y}\to J/\Psi +X$

Abstract

We show that the colour-singlet process ${\rm Y}\to J/\Psi +c\bar{c}g$ significantly contributes to the inclusive process ${\rm Y}\to J/\Psi +X$. We calculate the partial width and the momentum distribution of the produced $J/\Psi$ in this channel. The obtained width is comparable to the experimental data. The momentum distribution is fairly soft, which is in contrast to the results from the colour-octet processes discussed earlier in literature but is consistent with the CLEO measurements. Further experiments to check this contribution are suggested.

Latex 2.0 format, 12 pages, 3 ps figures

References in corpus (2)

• NRQCD matrix elements in polarization of J-Psi produced from b-decay
• Inclusive J/psi production in Upsilon decay via color-octet mechanisms

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• Remarks on CLEO New Measurements for Upsilon(1S) Decays to Charmonium Final States and Investigations on Associate Strange Particle Enhancement in Upsilon to J/Psi +X
• Experimental review of the ${\rm Y}(1S,2S,3S)$ physics at $e^{+}{e}^{-}$ colliders and the LHC
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• Inclusive $J/\psi$ and ${\eta }_c$ production in ${\rm Y}$ decay at $\mathcal{O}({\alpha }_s^5)$ in nonrelativistic QCD factorization
• QED Contribution to the Color-Singlet $\jpsi$ Production in ${\rm Y}$ Decay Near the Endpoint