Is the colour-octet mechanism consistent with the double $J/\psi$ production measurement at B-factories?

Abstract

Double $J/\psi$ production in $e^{+}{e}^{-}$ collisions involving colour-octet channels are evaluated up to order ${\alpha }^2{\alpha }_s^3$. Having implemented the variation of the parameters ($m_c$, ${\mu }_r$ and long-distance matrix elements), we found that the cross sections for producing double $J/\psi$ at B-factories range from $-0.016$fb to $0.245$fb, which are even much smaller than that via the colour-siglet mechanism. Accordingly, this result is consistent with the measurement by the Belle and BABAR Collaborations.

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Cited by in corpus (7)

• Exclusive production of $J/\psi +{\eta }_c$ at the $B$ factories Belle and Babar using the principle of maximum conformality
• QCD leading order study of the $J/\psi$ leptoproduction at HERA within the nonrelativistic QCD framework
• Breakdown of NRQCD Factorization in Processes Involving Two Quarkonia and its Cure
• Next-to-leading-order QCD corrections to the decay of $Z$ boson into ${\chi }_c({\chi }_b)$
• Double longitudinal-spin asymmetries in $J/\psi$ production at RHIC
• Statistical analysis of the azimuthal asymmetry in the $J/\psi$ leptoproduction in unpolarized $ep$ collisions
• Inclusive productions of ${\rm Y}(1S,2S,3S)$ and ${\chi }_b(1P,2P,3P)$ via the Higgs boson decay