Measurement of the K{sup +}{yields}{pi}{sup +}{nu}{nu} branching ratio

Journal Article · Sat Mar 01 00:00:00 EST 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.052003· OSTI ID:21249682

Adler, S; Atiya, M; Bhuyan, B; Chiang, I-H; Diwan, M V; Frank, J S; Haggerty, J; Jaffe, D E; Kettell, S H; Li, K K; Littenberg, L S; Redlinger, G; Strand, R C; Viren, B ^[1]; Anisimovsky, V V; Ivashkin, A P; Khabibullin, M M; Khotjantsev, A N; Kudenko, Yu G; Mineev, O V ^[2]

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1. Brookhaven National Laboratory, Upton, New York 11973 (United States)
2. Institute for Nuclear Research RAS, 60 October Revolution Pr. 7a, 117312 Moscow (Russian Federation)

Experiment E949 at Brookhaven National Laboratory studied the rare decay K{sup +}{yields}{pi}{sup +}{nu}{nu} and other processes with an exposure of 1.77x10{sup 12} K{sup +}'s. The data were analyzed using a blind analysis technique yielding one candidate event with an estimated background of 0.30{+-}0.03 events. Combining this result with the observation of two candidate events by the predecessor experiment E787 gave the branching ratio B(K{sup +}{yields}{pi}{sup +}{nu}{nu})=(1.47{sub -0.89}{sup +1.30})x10{sup -10}, consistent with the standard model prediction of (0.74{+-}0.20)x10{sup -10}. This is a more detailed report of results previously published [V. V. Anisimovsky et al., Phys. Rev. Lett. 93, 031801 (2004)].

• OSTI ID: 21249682
• Journal Information: Physical Review. D, Particles Fields, Vol. 77, Issue 5; Other Information: DOI: 10.1103/PhysRevD.77.052003; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BNL
BRANCHING RATIO
DECAY
FORECASTING
KAONS PLUS
NEUTRINOS
PARTICLE DECAY
PIONS PLUS
STANDARD MODEL