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On the Delta I = 1/2 rule in the Lambda N ----> N N reaction

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arxiv nucl-th/9904032 v2 pith:XZDRLOP6 submitted 1999-04-12 nucl-th

Z.Rudy , W. Cassing , L. Jarczyk , B. Kamys , P. Kulessa , O. W. B. Schult , A. Strzalkowski This is my paper · ORCID
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keywords lambdadecaydeltadependencemassratiorulecalculated
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abstract

It is shown that the mass dependence of the $\Lambda$-lifetime in heavy hypernuclei is sensitive to the ratio of neutron-induced to proton-induced non-mesonic decay rates R_n/R_p. A comparison of the experimental mass dependence of the lifetimes with the calculated ones for different values of R_n/R_p leads to the conclusion that this ratio is larger than 2 on the confidence level of 0.75. This suggests that the phenomenological $\Delta$I=1/2 rule might be violated for the nonmesonic decay of the $\Lambda$-hyperon.

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