Measurements of the braching fractions for psi(3770)--> D0D0-bar,D+D-,DD-bar$ and the resonance parameters of psi(3770) and psi(2S)

Abstract

We report measurements of the branching fractions for $\psi (3770)\to D^0{\bar{D}}^0,D^{+}{D}^{-},D\bar{D}$ and resonance parameters of $\psi (3770)$ and $\psi (2S)$. By analyzing the line-shapes of the cross sections for inclusive hadron, $D^0{\bar{D}}^0$ and $D^{+}{D}^{-}$ event production in the range from 3.660 GeV to 3.872 GeV covering both $\psi (2S)$ and $\psi (3770)$ resonances, we extract the branching fractions for $\psi (3770)$ decay into $D^0{\bar{D}}^0\mathrm{and}{D}^{+}{D}^{-}$ respectively to be $B(\psi (3770)\to D^0{\bar{D}}^0)=(46.7\pm 4.7\pm 2.3)$ and $B(\psi (3770)\to D^{+}{D}^{-})=(36.9\pm 3.7\pm 2.8)$, which give $B(\psi (3770)\to D\bar{D})=(83.6\pm 7.3\pm 4.2)$ and non-$D\bar{D}$ branching fraction of $\psi (3770)$ to be $B(\psi (3770)\to non-D\bar{D})=(16.4\pm 7.3\pm 4.2)$. We meanwhile obtain the resonance parameters of $\psi (3770)$ and $\psi (2S)$ to be $M_{\psi (3770)}=3772.2\pm 0.7\pm 0.3$ MeV, ${\Gamma }_{\psi (3770)}^{\mathrm{tot}}=26.9\pm 2.4\pm 0.3$ MeV and ${\Gamma }_{\psi (3770)}^{ee}=251\pm 26\pm 11$ eV; $M_{\psi (2S)}=3685.5\pm 0.0\pm 0.3$ MeV, ${\Gamma }_{\psi (2S)}^{\mathrm{tot}}=331\pm 58\pm 2$ keV and ${\Gamma }_{\psi (2S)}^{ee}=2.330\pm 0.036\pm 0.110$ keV; as well as the $R$ value for the light hadron production directly through one photon annihilation to be $R_{uds}=2.262\pm 0.054\pm 0.109$ in this energy region.

7 pages, 4 figures

References in corpus (7)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Measurements of the cross sections for $e^{+}{e}^{-}\to \mathrm{hadrons}$ at 3.650, 3.6648, 3.773 GeV and the branching fraction for $\psi (3770)\to \mathrm{non}-D\bar{D}$
• Measurement of Absolute Hadronic Branching Fractions of D Mesons and e^+e^- --> D barD Cross Sections at E_cm = 3773 MeV
• BESII Detector Simulation
• Radiative corrections for pion and kaon production at $e^{+}{e}^{-}$ colliders of energies below 2 GeV
• Measurement of Cross Sections for $D^0{\bar{D}}^0$ and $D^{+}{D}^{-}$ Production in $e^{+}{e}^{-}$ Annihilation at $\sqrt{s}=3.773$ GeV
• A Monte Carlo Generator for Full Simulation of e+e- to hadrons Cross section Scan Experiment

Cited by in corpus (62)

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• Study of the branching ratio of $\psi (3770)\to D\bar{D}$ in $e^{+}{e}^{-}\to D\bar{D}$ scattering
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• Experimental studies of the ${\pi }^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-}{\pi }^0$, $K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}{\pi }^0$ and $p\bar{p}{\pi }^{+}{\pi }^{-}{\pi }^0$ final states produced in $e^{+}{e}^{-}$ annihilation at $\sqrt{s}=$ 3.773 and 3.650 GeV
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