Observation of the Decay {ital K}{sup +} {r_arrow} {pi}{sup +}{mu}{sup +}{mu}{sup {minus}}

Journal Article · Sun Nov 30 23:00:00 EST 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.4756· OSTI ID:565229

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; Ito, M M; Marlow, D R; McPherson, R; Meyers, P D ; Selen, M A; Shoemaker, F C; Smith, A J ^[3]; Blackmore, E W; Bryman, D A; Felawka, L; Konaka, A; Kuno, Y; Macdonald, J A; Numao, T; Padley, P; Poutissou, J; Poutissou, R; Roy, J; Turcot, A S ^[4]; Kitching, P; Nakano, T; Rozon, M; Soluk, R ^[5]

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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, Canada, V6T 2A3 (CANADA)
5. Centre for Subatomic Research, University of Alberta, Edmonton, Alberta, Canada, T6G 2N5 (CANADA)

We have observed the rare decay K{sup +} {r_arrow} {pi}{sup +}{mu}{sup +}{mu}{sup {minus}} and measured the branching ratio {Gamma}(K{sup +} {r_arrow} {pi}{sup +}{mu}{sup +}{mu}{sup {minus}}) /{Gamma}(K{sup +} {r_arrow} all)=[5.0{plus_minus}0.4(stat){plus_minus} 0.7(syst){plus_minus}0.6(th)]{times}10{sup {minus}8}. We compare this result with predictions from chiral perturbation theory and estimates based on the decay K{sup +} {r_arrow} {pi}{sup +}e{sup +}e{sup {minus}}. {copyright} {ital 1997} {ital The American Physical Society}

• Research Organization: Brookhaven National Laboratory
• DOE Contract Number: AC02-76CH00016; FG02-91ER40671; W-7405-ENG-36
• OSTI ID: 565229
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BRANCHING RATIO
CHIRAL SYMMETRY
KAONS PLUS
MUONS MINUS
MUONS PLUS
PERTURBATION THEORY
PIONS PLUS
QUANTUM CHROMODYNAMICS
SEMILEPTONIC DECAY