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arXiv · hep-ex/0411068

Photon transitions in Upsilon(2S) and Upsilon(3S)

M. Artuso
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Abstract

We have studied the inclusive photon spectra in Upsilon(2S) and Υ(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 Upsilon(2S)->gamma chi_bJ(1P) and Upsilon(3S)->gamma chi_bJ(2P) J=0,1,2. We measure the rate for a rare E1 transition Upsilon(3S)->gamma chi_b0(1P) for the first time. We also set upper limits on the rates for the hindered magnetic dipole (M1) transitions to the eta_b(1S) and eta_b(2S) states.

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M. Artuso. 2004-11-22. Photon transitions in Upsilon(2S) and Upsilon(3S). https://doi.org/10.1103/physrevlett.94.032001

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