Abstract
We analyze the exclusive charmonium J/ψ+ηc 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/ψ and ηc mesons using our LFQM. Our nonfactorized result enhances the nonrelativistic QCD result by a factor of 3∼4 at s=10.6GeV.
| Original language | English |
|---|---|
| Article number | 094010 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 76 |
| Issue number | 9 |
| DOIs | |
| State | Published - 9 Nov 2007 |
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