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Measurement of cross sections for D0D¯0 and D+D− production in e+e− annihilation at s=3.773 GeV

Authors: Ablikim, M.; Bai, J.Z.; Ban, Y.; Bian, J.G.; Cai, X.; Chang, J.F.; Chen, H.F.; +192 Authors

Measurement of cross sections for D0D¯0 and D+D− production in e+e− annihilation at s=3.773 GeV

Abstract

AbstractThe cross sections for D0D¯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 pb−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 DD¯ production. A measurement of the total tree level hadronic cross section is obtained from the tree level DD¯ cross section and an extrapolation of the Ruds below the open charm threshold.

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