Understanding the e+e- → D(*)+ D(*)-processes observed by Belle

We calculate the production cross sections for D*D+*(-), D+D*(-) and D+D- in e(+)e(-) annihilation through one virtual photon in the framework of perturbative QCD with constituent quarks. The calculated cross sections for D*D+*(-) and D+D*(-) production are roughly in agreement with the recent Belle data. The helicity decomposition for D* meson production is also calculated. The fraction of the D*L-+/-(L) D-T*(Tau)(T) final state in the e(+)e(-) -> D*D+*(-) process is found to be 65%. The fraction of DD*(T) production is 100% and DD*(L) is forbidden in e(+)e(-) annihilation through one virtual photon. We further consider e(+)e(-) annihilation through two virtual photons, and then find the fraction of DD*(T) in the e(+)e(-) -> DD* process to be about 91%.