Measurement of the branching ratio for the decay eta ---> mu+ mu-
19934 pages
Published in:
- Phys.Rev.Lett. 70 (1993) 892-895
Experiments:
- Saclay
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Abstract: (APS)
The branching ratio (B) for η→μ+μ− has been measured at the SATURNE tagged-η facility using the reaction pd→3He η as a source of ∼108 tagged η’s per day. A sample of 100 η→μ+μ− decays on a background of 8 events yield B(η→μ+μ−) =[5.6−0.7+0.6(stat)±0.5(syst)]×10−6. This value is 1.3±0.2 times the unitarity (lower) bound of 4.3×10−6, in agreement with most quark and vector meson dominance model predictions.- eta: leptonic decay
- leptonic decay: eta
- muon: pair production
- pair production: muon
- eta: branching ratio
- photon photon: interaction
- interaction: photon photon
- magnetic spectrometer: experimental results
- Saclay PS
- eta --> muon+ muon-
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