Radiative Decay of the ψ(2S) into Two Pseudoscalar Mesons

Abstract

Radiative decays of the radially excited charmonium resonance, ψ(2S), into ππ, K Kbar and ηηfinal states have been measured in a sample of 3.96 * 10^6 ψ(2S) events collected by the BES collaboration. The branching ratios B(ψ(2S) -> γf_{2}(1270)) = (2.27 +- 0.26 +- 0.39) * 10^{-4} and B(ψ(2S) -> γf_0(1710)) * B(f_0(1710) -> K^+ K^-) = (5.59 +- 1.12 +- 0.93) * 10^{-5} are obtained. When compared to the corresponding radiative J/ψdecays, the observed ψ(2S) radiative decay rates into γf_2(1270) and γf_0(1710) are consistent with the 15% rule.

arXiv comment7 pages, 5 figures

References in corpus (4)

• Intrinsic Charm of Vector Mesons: A Possible Solution of the "rho pi" Puzzle
• An Explanation for the rho-pi Puzzle of J/psi and psi' Decays
• Study of the P-wave charmonium state χ_{cJ} in ψ(2S) decays
• Determination of the J/psi Leptonic Branching Fraction via psi(2S) -> pi^+ pi^- J/psi

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• chi_c0 and chi_c2 Decays into eta eta, eta eta', and eta' eta' Final States
• Measurement of chi_cJ Decays to 2(pi^+pi^-)ppbar Final States
• A Study of \bar{p}p -> Two Neutral Pseudoscalar Mesons at the chi_c0(1^3P_0) Formation Energy
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