Radiative Decay of the psi (2S) into Two Pseudoscalar Mesons
- SLAC
Radiative decays of the radically excited charmonium resonance, {psi}(2S), into {pi}{pi}, K{bar K} and {eta}{eta} final states have been measured in a sample of 3.96 x 10{sup 6} {psi}(2S) events collected by the BES collaboration. The branching ratios B({psi}(2S) {yields} {gamma}f{sub 2}(1270)) = (2.27 {+-} 0.26 {+-} 0.39) x 10{sup -4} and B({psi}(2S) {yields} {gamma}f{sub 0}(1710)) x B(f{sub 0}(1710) {yields} K{sup +}K{sup -}) = (5.59 {+-} 1.12 {+-} 0.93) x 10{sup -5} are obtained. When compared to the corresponding radiative J/{psi} decays, the observed {psi}(2S) radiative decay rates into {gamma}f{sub 2}(1270) and {gamma}f{sub 0}(1710) are consistent with the ''15%'' rule.
- Research Organization:
- Stanford Linear Accelerator Center, Menlo Park, CA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 799016
- Report Number(s):
- SLAC-PUB-9157
- Country of Publication:
- United States
- Language:
- English
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