A Measurement of the K " / K " Branching Ratio , ~ 3 e 3 the K 13 Form Factors , and the K " Decay Parameters
نویسندگان
چکیده
In a hydrogen bubble chamber experiment with a KL beam we have measured the K" /K" ~3 e3 branching ratio to be R = .741 * .044 and the slope of the f+ form factor to be A+ = .019 f. .013. The data have been analyzed with a new variable, (p;)*, which isolates a sample of unique K e3 decays and is independent of the KL beam momentum. These results are compatible with the predictions of K* dominance for f+ and the Callan-Treiman relation for fo, but indicate a breaking of the &I=$ rule. We have also determined the ?L+ fi'n-n'/(all charged KL decays) branching ratio to be R = Tl .146 * .004, and have found the E* slope of the K no fl3 Dalitz plot to be given by g = .73 t .04.
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