Measurement of the Branching Ratio for Pion Beta Decay
نویسندگان
چکیده
منابع مشابه
Measurement of the rate for pion beta decay.
We present here a measurement of the rate for pion beta decay (&t3), & —n'e'v, made with the use of a new technique at the Clinton P. Anderson Meson Physics Facility (LAMPF), which is substantially more precise than previous measurements. The conserved-vector-current (CVC) hypothesis, ' a cornerstone of the unified theory of electromagnetic and weak interactions, relates the rate for ~P directl...
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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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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1962
ISSN: 0031-9007
DOI: 10.1103/physrevlett.9.400