Evidence for the Decay K + → π + νν̄
نویسندگان
چکیده
An event consistent with the signature expected for the rare kaon decay K+ → π+νν̄ has been observed. In the pion momentum region examined, 211 < P < 230 MeV/c, the backgrounds are estimated to contribute 0.08 ± 0.03 events. If the event is due toK+ → π+νν̄, the branching ratio is 4.2 −3.5× 10−10. PACS numbers: 13.20.Eb, 12.15.Hh, 14.80.Mz Typeset using REVTEX
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تاریخ انتشار 1997