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Phys. Rev. Lett. 88, 041803 (2002) [4 pages]

Further Evidence for the Decay K+π+νν̅

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S. Adler et al. (E787 Collaboration)
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Received 2 November 2001; published 11 January 2002

Additional evidence for the rare kaon decay K+π+νν̅ has been found in a new data set with comparable sensitivity to the previously reported result. One new event was observed in the pion momentum region examined, 211<P<229MeV/c, bringing the total for the combined data set to two. Including all data taken, the backgrounds were estimated to contribute 0.15±0.05 events. The branching ratio is B(K+π+νν̅ ) = 1.57-0.82+1.75×10-10.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.041803
DOI:
10.1103/PhysRevLett.88.041803
PACS:
13.20.Eb, 12.15.Hh, 14.80.Mz