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Measurement of the Branching Ratio

✍ Scribed by Toshio Numao

Publisher: Elsevier Science
Year: 2009
Tongue: English
Weight: 306 KB
Volume: 827
Category: Article
ISSN: 0375-9474
DOI: 10.1016/j.nuclphysa.2009.05.096

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✦ Synopsis

Three new events of the decay K + → π + νν have been observed in the pion momentum region 140 < P π < 199 MeV/c with an estimated background of 0.93 ± 0.17(stat) +0.32 -0.24 (syst) events. Combining this observation with the previously reported results yields a branching ratio of BR(K + → π + νν) = 1.73 +1.15 -1.05 × 10 -10 consistent with the Standard Model prediction.

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