Hyperfeinstrukturuntersuchung des 6p
2
P
3/2-Terms im Au I-Spektrum durch Resonanzstreuung von Licht |
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Authors: | G Goldmann C Hahn J Ney |
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Institution: | 1. Institut für Hochenergiephysik der Universit?t Heidelberg, Germany 2. CERN, Geneva, Switzerland 4. University of California and Lawrence Radiation Laboratory, Berkeley, Calif., USA
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Abstract: | From about 6×106 stoppingK ?-meson reactions in the Saclay 80 cm hydrogen bubble chamber 70Σ ?→Λe?¯ν and 11Σ+→Λe+ν decays have been identified. The ratio of the vector to axial vector coupling constant has been determined,f 1/g 1=?0.22±0.28, consistent with the predictionf 1=0 of the CVC-theory. The branching ratios for the two decay modes are,Γ(Σ ?→Λe?ν)/Γ(Σ?→ all modes)=(0.69±0.12). 10?4,Γ(Σ+→Λe+ν)/Γ(Σ+→ all modes)=(0.29±0.10). 10?4. The ratio, Γ(Σ+→Λe+)/Γ(Σ?→Λe?v)=0.69±0.18, agrees with the phase space ratio, 0.61, therefore a theory that includes no second class currents is consistent with the data. |
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