${\eta }_c$ production associated with light hadrons at the B-factories and the future super B-factories

Abstract

We present a complete study of the associated production of the ${\eta }_c$ meson with light hadrons in $e^{+}{e}^{-}$ collisions at the B-factory energy, which is demonstrated to be one of the best laboratories for testing the colour-octet (CO) mechanism. The colour-siglet contributions are evaluated up to $O({\alpha }^2{\alpha }_s^3)$ while the CO ones are evaluated up to $O({\alpha }^2{\alpha }_s^2)$. For the first time, the angular distribution of the ${}^1{S}_0^{[8]}$ production is studied at QCD next-to-leading order. We find that the ${}^1{S}_0^{[8]}$ channel dominate the total cross section, while the ${}^1{P}_1^{[8]}$ one exhibit its importance in the angular distribution, which turns out to be downward going with respect to $\cos \theta$. This can be considered as the most distinct signal for the CO mechanism.

References in corpus (13)

• J/psi (psi') production at the Tevatron and LHC at O(α_s^4v^4) in nonrelativistic QCD
• Polarization for Prompt J/psi, psi(2s) production at the Tevatron and LHC
• ${\eta }_c$ production at the LHC challenges nonrelativistic-QCD factorization
• Double charm production e^+ e^- \to J/ψ+ c \bar{c} at B factories with next-to-leading order QCD corrections
• Impact of ${\eta }_c$ hadroproduction data on charmonium production and polarization within NRQCD framework
• Quarkonium production in the LHC era: a polarized perspective
• ${\eta }_c$ production at LHC and indications on the understanding of $J/\psi$ production
• QCD corrections to ${\mathbf{e}}^{+}{\mathbf{e}}^{-}\to \mathbf{J}/\mathbf{\psi gg}$ at B Factories
• Next-to-Leading-Order QCD Corrections to e^ + e^- -> J/ψ+gg at the B Factories
• Measurement of the e+e- -> J/psi ccbar cross section at \sqrt{s} ~10.6 GeV
• Next-to-Leading-Order QCD Corrections to e+ e- --> J/psi c c_bar at the B Factories
• Production of ${\eta }_Q$ meson at LHC
• h_c Production at Hadron Colliders

Cited by in corpus (1)

• Kinematic distributions of the ${\eta }_c$ photoproduction in $ep$ collisions within the nonrelativistic QCD framework