Search for the decay K/sup +/. --> pi. /sup +/. mu. /sup +/e/sup -/

Journal Article · Mon Oct 31 04:00:00 EST 1988 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.61.2062· OSTI ID:7086685

Campagnari, C; Alliegro, C; Chaloupka, V; Cooper, P S; Egger, J; Gordon, H A; Hadley, N J; Herold, W D; Jagel, E A; Kaspar, H; others, and

We report here on a search for the lepton-family-number-violating decay K/sup +/..--> pi../sup +/..mu../sup +/e/sup -/. We found no evidence for this decay mode and we establish an upper limit on its branching ratio of 1.1 x 10/sup -9/ at the 90% confidence level (C.L.) for a uniform phase-space decay distribution. We also use this result to establish an upper limit for the branching ratio of the decay ..pi../sup 0/..--> mu../sup +/e/sup -/ of 7.8 x 10/sup -8/ (90% C.L.).

• Research Organization: Brookhaven National Laboratory, Upton, New York 11973
• OSTI ID: 7086685
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 61:18; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BASIC INTERACTIONS
BOSONS
BRANCHING RATIO
BROOKHAVEN AGS
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KAONS
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LEPTON NUMBER
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