Photon transitions in psi(2S) decays to chi(cJ)(1P) and eta(c)(1S)

2004
We have studied the inclusive photon spectrum in psi(2S) decays using the CLEOIII detector. We present the most precise measurements of electric dipole (E1) photon transition rates for psi(2S)--> gamma chicJ(1P) (J=0,1,2). We also confirm the hindered magnetic dipole(M1) transition, psi(2S)-->gamma etac(1S). However, the direct M1 transition psi(2S)-->gamma etac(2S) observed by the Crystal Ballas a narrow peak at a photon energyof 91 MeV is not found in our data.
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