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- W2002522819 abstract "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 $D^{*pm}_LD^{*mp}_T$ final state in $e^+e^-to D^{*+}D^{*-}$ 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 $e^+e^-to DD^{*}$ process to be about 91%." @default.
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- W2002522819 date "2010-02-25" @default.
- W2002522819 modified "2023-09-24" @default.
- W2002522819 title "Understanding thee+e−→D(*) +D(*) −processes observed by Belle" @default.
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- W2002522819 doi "https://doi.org/10.1088/0954-3899/37/4/045005" @default.
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