Study of the branching ratio of $ψ(3770)\to D\bar{D}$ in $e^+e^-\to D\bar{D}$ scattering

Details Study of the branching ratio of $ψ(3770)\to D\bar{D}$ in $e^+e^-\to D\bar{D}$ scattering Study of the branching ratio of $ψ(3770)\to D\bar{D}$ in $e^+e^-\to D\bar{D}$ scattering

2009-10-22

arxiv.org/abs/0910.4278v3

Phys.Rev.D81:011501,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 1 figure, 1 table, version to appear in Phys. Rev. D Rapid communications

Scientific paper

10.1103/PhysRevD.81.011501

Based on the data of BES and Belle, the production of $D\bar{D}$ in the $e^+e^-\to D\bar{D}$ scattering process is studied in this paper. We analyze the continuum and resonant contributions in the energy region from 3.7 to 4.4 GeV. In the $\chi^2$ fit to data, we obtain the resonance parameters of $\psi(3770)$, the branching ratio of $\psi(3770)\to D\bar{D}$ decay by confronting the data to the theoretical formula where both the contributions of the resonances, continuum and interference effects are included. We obtain the branching ratio of $\psi(3770)\to D\bar{D}$ decay is $97.2%\pm 8.9%$, as well as the branching ratio of $\psi(4040)$, $\psi(4160)\to D\bar{D}$ decays.

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