# Review of Experimental Studies of $ψ3770$ non-$Dar D$ Decays - High Energy Physics - Experiment

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Abstract: We review the progress on experimental studies of the non-$D\bar D$ decays ofthe $\psi3770$ resonance. With the world average of the observed crosssections for $D\bar D$ production measured at 3.773 GeV by the MARK-I, MARK-II,BES and CLEO Collaborations, combined together with the cross section for$\psi3770$ production at its peak as well as initial state radiativecorrection factor, we find that the non-$D\bar D$ branching fraction of$\psi3770$ decays is $B\psi3770\to { m non}-D\bar D=19.8\pm 1.8 \pm5.6%$, which is consistent within error with $B\psi3770\to { m non}-D\barD=14.7\pm 3.2%$ measured previously by the BES Collaboration. In addition, aglobal amplitude analysis of the cross sections for $e^+e^- \to { m LH}$ LH=light hadron measured by the CLEO Collaboration shows that the light hadronbranching fraction of $\psi3770$ decays can be as large as about 11%. Combingthe totally measured hadronic and electromegnatic transition rate together withthe light hadron branching fraction in the decays of $\psi3770$ yields thetotal non-$D\bar D$ branching fraction in the decays of $\psi3770$ to beabout 13%.

Author: G. Rong, D. Zhang, J.C. Chen

Source: https://arxiv.org/