Understanding the $e^+e^-\to D^{(*)+}D^{(*)-}$ processes observed by Belle

Details Understanding the $e^+e^-\to D^{(*)+}D^{(*)-}$ processes observed by Belle Understanding the $e^+e^-\to D^{(*)+}D^{(*)-}$ processes observed by Belle

2003-11-27

arxiv.org/abs/hep-ph/0311364v1

J.Phys.G37:045005,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 2 figures

Scientific paper

10.1088/0954-3899/37/4/045005

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%.

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