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

We have studied the inclusive photon spectrum in psi(2S) decays using the CLEO III 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 Ball as a narrow peak at a photon energy of 91 MeV is not found in our data.

14.40.Gx
13.20.Gd
electron positron: colliding beams
electron positron: annihilation
psi(3685): electroproduction
psi(3685): radiative decay
photon: energy spectrum
transition: electric
transition: magnetic
chi/c0(3415)

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