We have studied the inclusive photon spectrum in ψ(2S) decays using the CLEO III detector. We present the most precise measurements of electric dipole (E1) photon transition rates for ψ(25) → γχ eJ(1P) (J = 0, 1, 2). We also confirm the hindered magnetic dipole (M1) transition, ψ(2S) → γη c(1S). However, the direct M1 transition ψ(2S) → γη c(2S) observed by the Crystal Ball as a narrow peak at a photon energy of 91 McV is not found in our data.
|Original language||English (US)|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - Dec 1 2004|
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)