Inclusive J/psi production in Upsilon decay via color-octet mechanisms

Abstract

Calculations for inclusive J/psi production in Upsilon decay through the color-octet mechanisms b\bar b[^3S_1, 1] -> c \bar c[^{2s+1}L_J, 8] + g are presented. It is shown that these O(alpha^5_sv^4_c) contributions compete with other color-octet mechanisms considered in the literature. A critical numerical analysis of the color-octet contributions to Upsilon -> J/psi + X shows that further work in this channel, both theoretical and experimental, is necessary in order to clearly understand the significance of the color-octet component of the c \bar c component inside the J/psi system.

arXiv commentMinor changes, corrected typos, version to be published in PRD

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• Contribution of Colour-singlet Process ${\rm Y}\to J/\Psi +c\bar{c}g$ to ${\rm Y}\to J/\Psi +X$
• Breakdown of NRQCD Factorization in Processes Involving Two Quarkonia and its Cure
• Inclusive J/ψProduction In ΥDecay Via Color-singlet Mechanism
• Search for $XYZ$ states in ${\rm Y}(1S)$ inclusive decays
• Color-singlet J/psi production at alpha_s^6 in Upsilon decay
• 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
• Inclusive ${\chi }_{cJ}$ production in ${\rm Y}$ decay at $\mathcal{O}({\alpha }_s^5)$ in NRQCD factorization
• Inclusive $J/\psi$ and ${\eta }_c$ production in ${\rm Y}$ decay at $\mathcal{O}({\alpha }_s^5)$ in nonrelativistic QCD factorization