BES Collaboration
Published 2003-07-14, updated 2004-12-23Version 3
Evidence of $\psi(3770)$ decays to a non-${D \bar D}$ final state is observed. A total of $11.8 \pm 4.8 \pm 1.3$ $\psi(3770) \to \PPJP$ events are obtained from a data sample of 27.7 $\rm {pb^{-1}}$ taken at center-of-mass energies around 3.773 GeV using the BES-II detector at the BEPC. The branching fraction is determined to be $BF(\psi(3770) \to \PPJP)=(0.34\pm 0.14 \pm 0.09)%$, corresponding to the partial width of $\Gamma(\psi(3770) \to \PPJP) = (80 \pm 33 \pm 23)$ keV.
Comments: 8 pages, 7 figures, Submitted to Physics Letters B
Journal: Phys.Lett.B605:63-71,2005
Observation of di-structures in $e^+e^-\rightarrow{J}/ψ{\rm X}$ at center-of-mass energies around 3.773 GeV
Precision measurements of $σ_{B}(e^+e^- \to K_{S}^{0}K^{\pm}π^{\mp})$ at center-of-mass energies between 3.8 and 4.6 GeV
Measurement of the Born cross sections for $e^+e^- \to η^\prime π^{+}π^{-}$ at center-of-mass energies between $2.00$ and $3.08$~GeV
