Measurement of Cross Sections for $D^0{\bar{D}}^0$ and $D^{+}{D}^{-}$ Production in $e^{+}{e}^{-}$ Annihilation at $\sqrt{s}=3.773$ GeV

Abstract

The cross sections for $D^0{\bar{D}}^0$ and $D^{+}{D}^{-}$ production at 3.773 GeV have been measured with BES-II detector at BEPC. These measurements are made by analyzing a data sample of about 17.3 $\mathrm{p}{\mathrm{b}}^{-1}$ collected at the center-of-mass energy of 3.773 GeV. Observed cross sections for the charm pair production are radiatively corrected to obtain the tree level cross section for $D\bar{D}$ production. A measurement of the total tree level hadronic cross section is obtained from the tree level $D\bar{D}$ cross section and an extrapolation of the $R_{uds}$ below the open charm threshold.

arXiv comment7 pages, 2 figures, It was submitted to Physics Letters B in July, 2004

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• Direct Measurements of the Branching Fractions for $D^0\to K^{-}{e}^{+}{\nu }_e$ and $D^0\to {\pi }^{-}{e}^{+}{\nu }_e$ and Determinations of the Form Factors $f_{+}^K(0)$ and $f_{+}^{\pi }(0)$
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• Study of the anomalous cross-section lineshape of e^+e^-\to D\bar D at ψ(3770) with an effective field theory
• Measurements of the observed cross sections for exclusive light hadron production in e^+e^- annihilation at \sqrt{s}= 3.773 and 3.650 GeV
• Physics Accomplishments and Future Prospects of the BES Experiments at the BEPC Collider
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