Measurement of the branching ratio for the decay η→μ+μ−
نویسندگان
چکیده
منابع مشابه
Measurement of the Dalitz-decay branching ratio of the π
The ratio B = Γ (π → eeγ)/Γ (π → γγ) is measured by comparing the production rates of the π in the two decay channels. The analysis is based on approximately four million hadronic decays of the Z boson recorded by the ALEPH detector in the years 1991 to 1995. The value of B is determined to be (1.140 ± 0.041)%. A recalculation of the Particle Data Group world average gives rise to a slightly im...
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15 صفحه اولMeasurement of the branching fraction for the decay
We present a measurement of the branching ratio BR(K → π±e∓ν̄(ν)) performed using the KLOE detector. KS-mesons are produced in the reaction e +e− → φ → KSKL at the DAΦNE collider. In a sample of ∼5 × 10 6 KS-tagged events we find 624± 30 semileptonic KS decays. Normalizing to the KS→π +π− count in the same data sample, we obtain BR(KS → πeν)= (6.91 ± 0.37) × 10 −4, in agreement with the Standard...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1993
ISSN: 0031-9007
DOI: 10.1103/physrevlett.70.892