Search for the decay {ital K}{sup +}{bold {searrow}{pi}}{sup +}{bold {nu}{bar {nu}}}

Journal Article · Thu Feb 01 00:00:00 EST 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.76.1421· OSTI ID:284541

Adler, S; Atiya, M S; Chiang, I; Frank, J S; Haggerty, J S; Kycia, T F; Li, K K; Littenberg, L S; Sambamurti, A; Stevens, A; Strand, R C; Witzig, C ^[1]; Louis, W C ^[2]; Akerib, D S; Ardebili, M; Convery, M R; Ito, M M; Marlow, D R; McPherson, R A; Meyers, P D ; Selen, M A; Shoemaker, F C; Smith, A J ^[3]; Blackmore, E W; Bryman, D A; Felawka, L; Kitching, P; Konaka, A; Kujala, V A; Kuno, Y; Macdonald, J A; Nakano, T; Numao, T; Padley, P; Poutissou, J; Poutissou, R; Roy, J; Soluk, R; Turcot, A S ^[4]

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1. Brookhaven National Laboratory, Upton, New York 11973 (United States)
2. Medium Energy Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
3. Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544 (United States)
4. TRIUMF, Vancouver, British Columbia, V6T 2A3 (CANADA)

An upper limit on the branching ratio for the decay {ital K}{sup +}{r_arrow}{pi}{sup +}{nu}{nu} is set at 2.4{times}10{sup {minus}9} at the 90{percent} C.L. using pions in the kinematic region 214 MeV/{ital c}{lt}{ital P}{sub {pi}}{lt}231 MeV/ {ital c}. An upper limit of 5.2{times}10{sup {minus}10} is found on the branching ratio for decays {ital K}{sup +}{r_arrow}{pi}{sup +}{ital X}{sup 0}, where {ital X}{sup 0} is any massless, weakly interacting neutral particle. Limits are also set for cases where {ital M}{sub {ital X}{sup 0}}{approx_gt}0. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States)
• DOE Contract Number: AC02-76CH00016; FG02-91ER40671
• OSTI ID: 284541
• Journal Information: Physical Review Letters, Vol. 76, Issue 9; Other Information: PBD: Feb 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
KAONS PLUS
SEMILEPTONIC DECAY
PIONS PLUS
NEUTRINOS
ANTINEUTRINOS
BRANCHING RATIO
MASSLESS PARTICLES
NEUTRAL PARTICLES