Further Search for the Decay K{sup +}{yields}{pi}{sup +}{nu} {nu}(bar sign)

Journal Article · Mon Apr 24 00:00:00 EDT 2000 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.84.3768· OSTI ID:20216318

Adler, S ^[1]; Atiya, M S ^[1]; Chiang, I-H ^[1]; Diwan, M V ^[1]; Frank, J S ^[1]; Haggerty, J S ^[1]; Jain, V ^[1]; Kettell, S H ^[1]; Kycia, T F ^[1]; Li, K K ^[1]

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1. Brookhaven National Laboratory, Upton, New York 11973 (United States)

A search for additional evidence for the rare kaon decay K{sup +}{yields}{pi}{sup +}{nu}{nu} (bar sign) has been made with a new data set comparable in sensitivity to the previous exposure that produced a single event. No new events were found in the pion momentum region examined, 211<P<229 MeV/c . Including a reanalysis of the original data set, the backgrounds were estimated to contribute 0.08{+-}0.02 events. Based on one observed event, the new branching ratio is B(K{sup +}{yields}{pi}{sup +}{nu} {nu}(bar sign))=1.5{sup +3.4}{sub -1.2}x10{sup -10} . (c) 2000 The American Physical Society.

• OSTI ID: 20216318
• Journal Information: Physical Review Letters, Vol. 84, Issue 17; Other Information: PBD: 24 Apr 2000; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
KAONS PLUS
PIONS PLUS
NEUTRINOS
ANTINEUTRINOS
BRANCHING RATIO
PARTICLE DECAY
QUARK MODEL
EXPERIMENTAL DATA