Measurement of the e+e- --> D(*)+D(*)- cross-sections

Details Measurement of the e+e- --> D(*)+D(*)- cross-sections Measurement of the e+e- --> D(*)+D(*)- cross-sections

2003-07-30

arxiv.org/abs/hep-ex/0307084v2

Surveys High Energ.Phys.18:221-232,2003

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, 3 figures. Paper submitted to the EPS2003 conference Typo in DD* helicity analysis is corrected in the second draft

Scientific paper

10.1080/01422410310001610400

In this paper we report the first measurement of $e^+e^- \to D^{(*)+}D^{(*)-}$ processes. The cross-sections for $e^+^e- \to D^{*+}D^{*-}$ and $e^+e^- \to D^+D^{*-}$ at $\sqrt{s}=10.58\mathrm{GeV}/c^2$ have been measured to be $0.65 \pm 0.04 \pm 0.07 \mathrm{pb}$ and $0.71 \pm 0.05 \pm 0.09 \mathrm{pb}$, respectively. We set an upper limit on the cross-section of e+e- --> D+ D- of $0.04 \mathrm{pb}$ at the 90% confidence level. In addition we have measured the fraction of the $D^{*\pm}_T D^{*\mp}_L$ final state in the e+e- --> D*+ D*- reaction to be $(97\pm 5)%$. The analysis is performed using $88.9 \mathrm{fb}^{-1}$ of data collected by the Belle detector at the $e^{+}e^{-}$ asymmetric collider KEKB.

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