Perturbative QCD analysis of exclusive J/ψ+η_c production in e^+e^- annihilation

Abstract

We analyze the exclusive charmonium $J/\psi +{\eta }_c$ pair production in $e^{+}{e}^{-}$ annihilation using the nonfactorized perturbative QCD and the light-front quark model(LFQM) that goes beyond the peaking approximation. We effectively include all orders of higher twist terms in the leading order of QCD coupling constant and compare our nonfactorized analysis with the usual factorized analysis in the calculation of the cross section. We also calculate the quark distribution amplitudes, the Gegenbauer moments, and the decay constants for $J/\psi$ and ${\eta }_c$ mesons using our LFQM. Our nonfactorized result enhances the NRQCD result by a factor of $3\sim 4$ at $\sqrt{s}=10.6$ GeV.

17 pages, 6figures; added 2 more figures; version to appear in Physical Review D

References in corpus (3)

• Distribution amplitudes and decay constants for $(\pi ,K,\rho ,K^{\ast })$ mesons in light-front quark model
• Semileptonic $B_c$ decays and Charmonium distribution amplitude
• The study of leading twist light cone wave functions of J/Psi meson

Cited by in corpus (4)

• Modelling light-cone distribution amplitudes from non-relativistic bound states
• The study of leading twist light cone wave functions of 2S state charmonium mesons
• Study of exclusive processes e^+ e^- \to VP
• The study of double vector charmonium mesons production at B-factories within light cone formalism