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arXiv · hep-ex/0612016

Measurement of $\psip$ Radiative Decays

M. Ablikim·J. Z. Bai·Y. Ban·BES collaboration
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Abstract

Using 14 million psi(2S) events accumulated at the BESII detector, we report first measurements of branching fractions or upper limits for psi(2S) decays into gamma ppbar, gamma 2(pi^+pi^-), gamma K_s K^-pi^++c.c., gamma K^+ K^- pi^+pi^-, gamma K^{*0} K^- pi^+ +c.c., gamma K^{*0}\bar K^{*0}, gamma pi^+pi^- p pbar, gamma 2(K^+K^-), gamma 3(pi^+pi^-), and gamma 2(pi^+pi^-)K^+K^- with the invariant mass of hadrons below 2.9GeV/c^2. We also report branching fractions of psi(2S) decays into 2(pi^+pi^-) pi^0, omega pi^+pi^-, omega f_2(1270), b_1^\pm pi^\mp, and pi^0 2(pi^+pi^-) K^+K^-.

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M. Ablikim, J. Z. Bai, Y. Ban, BES collaboration. 2007-07-05. Measurement of $\psip$ Radiative Decays. https://doi.org/10.1103/physrevlett.99.011802

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