Study of conversion decays φ-->ηe+e-, η-->e+e-γ and η-->π+π- e+e- at CMD-2
Abstract
Using 15.1 pb-1 of data collected by CMD-2 in the /φ-meson energy range, the branching ratios of the following conversion decays have been measured: B(φ-->ηe+e-)=(1.14+/-0.10+/- 0.06)×10-4, B(η-->e+e-γ)=(7.10+/-0.64+/- 0.46)×10-3, B(η-->π+π-e+e- )=(3.7+2.5-1.8+/-0.3)×10-4. The upper limits for the following rare conversion decays have been obtained at the 90% confidence level: B(φ-->ημ+μ-)<9.4×10- 6, B(η-->e+e-e+e- )<6.9×10-5.
- Publication:
-
Physics Letters B
- Pub Date:
- March 2001
- DOI:
- 10.1016/S0370-2693(01)00123-X
- arXiv:
- arXiv:hep-ex/0012039
- Bibcode:
- 2001PhLB..501..191A
- Keywords:
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- High Energy Physics - Experiment
- E-Print:
- 16 pages, 7 PostScript figures. To be published in Phys. Lett. B