ISSN:
1434-601X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract In a bubble chamber experiment about 2×106 Σ ±-decays have been measured to separateΣ ±→ne±¯ν events from the two-body modes. NoΣ + →ne + ν event was found whereas 607Σ −→ne−¯ν decays could be identified. The data yield for the ΔQ=−ΔS decay an upper limit: $$\frac{{\Gamma \left( {\sum {^ + } \to ne^ + v} \right)}}{{\Gamma \left( {\sum {^ - } \to ne^ - v} \right)}}〈 1.9 x 10^{ - 2} (90\% confidence level)$$ and the branching ratio: $$\frac{{\Gamma \left( {\sum {^ - } \to ne^ - v} \right)}}{{\Gamma \left( {\sum {^ - } \to n\pi ^ - } \right)}} = (1.09 \pm 0.06) x 10^{ - 3} .$$
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01674830