Observation of the decay $\psip\rar\kstark$

Abstract

Using 14 million $\psi (2S)$ events collected with the BESII detector, branching fractions of $\psip\rar\kstarkpm$ and $\kstarknn$ are determined to be: $\calB(\psip\rar\kstarkpm)=(2.9^{+1.3}_{-1.7}\pm0.4)\times 10^{-5}$ and $\calB(\psip\rar\kstarknn)=(13.3^{+2.4}_{-2.7}\pm1.9)\times 10^{-5}$. The results confirm the violation of the "12%" rule for these two decay channels with higher precision. A large isospin violation between the charged and neutral modes is observed.

arXiv comment5 pages, 3 figures

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Cited by in corpus (15)

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• Study of electromagnetic decay of $J/\psi$ and ${\psi }^{\prime }$ to vector and pseudoscalar
• Observation of Thirteen New Exclusive Multi-Body Hadronic Decays of the $\psi (2S)$
• Search for psi(3770)\raρπat the BESII detector at the Beijing Electron-Positron Collider
• Measurement of the exclusive light hadron decays of the psi'' in e+e- experiments
• Measurements of $\psip$ decays into $\gamma K\bar{K}\pi$ and $γη\pipi$
• Measurement of χ_cJ--> K+K-K+K-
• Survival before annihilation in Psi-prime decays
• Observation of the decay $\psi (3686)$ $\to$ $\Lambda {\bar{\Sigma }}^{\pm }{\pi }^{\mp }+c.c.$
• Experimental study of psi' decays to K+K- pi^0 and K+K- eta
• Study of $\psi (3686)\to \omega K\bar{K}\pi$ decays
• Precise measurement of the branching fractions of $J/\psi \to \bar{\Lambda }{\pi }^{+}{\Sigma }^{-}+c.c.$ and $J/\psi \to \bar{\Lambda }{\pi }^{-}{\Sigma }^{+}+c.c.$
• Pseudoscalar mixing in J/psi and psi(2S) decay