New Measurement of the K{sup +}{yields}{pi}{sup +}{nu}{nu} Branching Ratio

Journal Article · Fri Nov 07 00:00:00 EST 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.101.191802· OSTI ID:21179886

Artamonov, A V; Kozhevnikov, A P; Landsberg, L G; Mukhin, V A; Obraztsov, V F; Patalakha, D I; Petrenko, S V; Vavilov, D V ^[1]; Bassalleck, B; Lewis, B ^[2]; Bhuyan, B; Chiang, I-H; Diwan, M V; Frank, J S; Jaffe, D E; Kettell, S H; Li, K K; Littenberg, L S; Redlinger, G; Strand, R C ^[3]

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1. Institute for High Energy Physics, Protvino, Moscow Region, 142 280 (Russian Federation)
2. Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131 (United States)
3. Brookhaven National Laboratory, Upton, New York 11973 (United States)

Three events for the decay K{sup +}{yields}{pi}{sup +}{nu}{nu} have been observed in the pion momentum region below the K{sup +}{yields}{pi}{sup +}{pi}{sup 0} peak, 140<P{sub {pi}}<199 MeV/c, with an estimated background of 0.93{+-}0.17(stat.){sub -0.24}{sup +0.32}(syst.) events. Combining this observation with previously reported results yields a branching ratio of B(K{sup +}{yields}{pi}{sup +}{nu}{nu})=(1.73{sub -1.05}{sup +1.15})x10{sup -10} consistent with the standard model prediction.

• OSTI ID: 21179886
• Journal Information: Physical Review Letters, Vol. 101, Issue 19; Other Information: DOI: 10.1103/PhysRevLett.101.191802; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
KAONS PLUS
MEV RANGE 100-1000
NEUTRINOS
PAIR PRODUCTION
PARTICLE DECAY
PIONS NEUTRAL
PIONS PLUS
STANDARD MODEL