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arXiv · 0905.4820

Recent Results on $ψ(3770)$ Physics at BES

M. G. Zhao·for Bes Collaboration
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Abstract

There are about 33, 6.5 and 1.0 pb$^{-1}$ of $e^+e^-$ annihilation data have been taken around the center-of-mass energies of $\sqrt s=$ 3.773 GeV, at $\sqrt s=$ 3.650 GeV and at $\sqrt s=$ 3.6648 GeV, respectively, with the BES-II detector at the BEPC collider. By analyzing these data sets, we have measured the branching fraction for $ψ(3770)\to$ non-$D\bar D$ by several different methods; and have observed an anomalous line shape of $σ^{e^+e^-\to{\rm hadrons}}$ in energy region from 3.65 to 3.87 GeV; and have measured the line shapes of the $D^+D^-$, $D^0\bar D^0$ and $D\bar D$ production and together with the ratios of the production rates of $D^+D^-$ and $D^0\bar D^0$ in $e^+e^-$ annihilation around the $ψ(3770)$ resonance.

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M. G. Zhao, for Bes Collaboration. 2009-06-03. Recent Results on $ψ(3770)$ Physics at BES. https://arxiv.org/abs/0905.4820

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