Photon transitions in ψ(2S) decays to χcJ(1P) and ηc(1S)
Photon transitions in ψ(2S) decays to χcJ(1P) and ηc(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 …