Abstract
We have studied the inclusive photon spectra in Y(2S) and Y(3S) decays using a large statistics data sample obtained with the CLEO III detector. We present the most precise measurements of electric dipole (E1) photon transition rates and photon energies for Y(2S) → γχbJ(1P) and Y(3S) → γχbJ(2P) (J = 0, 1, 2). We measure the rate for a rare E1 transition Y(3S) → γχb0(1P) for the first time. We also set upper limits on the rates for the hindered magnetic dipole (M1) transitions to the ηb (1S) and ηb (2S) states.
| Original language | English (US) |
|---|---|
| Article number | 032001 |
| Journal | Physical review letters |
| Volume | 94 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jan 28 2005 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy
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