Estimation of the branching ratio of the decay [ital K][sub [ital L]][sup 0][r arrow][ital e][sup +][ital e[minus]][ital e+][ital e[minus]] from the [ital K][sub [ital L]][sup 0][r arrow][ital e][sup +][ital e[minus]][ital X] process

Journal Article · Wed Mar 31 23:00:00 EST 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.47.R2644· OSTI ID:6654955

Akagi, T; Fukuhisa, R; Hemmi, Y; Inagaki, T; Ishikawa, K; Kishida, T; Kobayashi, M; Komatsubara, T K; Kuze, M; Sai, F; Sato, T; Shinkawa, T; Suekane, F; Takamatsu, K; Toyoura, J; Yamamoto, S S; Yoshimura, Y ^[1]

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1. Department of Physics, Tohoku University, Sendai 980 (Japan) Department of Physics, University of Tokyo, Tokyo 113 (Japan) Department of Physics, Kyoto Univeristy, Kyoto 606 (Japan) National Laboratory for High Energy Physics, KEK, Tsukuba 305 (Japan)

In an experiment to search for the decay [ital K][sub [ital L]][sup 0][r arrow][ital ee] using the 12-GeV Proton Synchrotron at KEK, we observed 18 events with the [ital e][sup +][ital e[minus]] effective mass greater than 470 MeV/[ital c][sup 2]. They are presumed to come mainly from the decay [ital K][sub [ital L]][sup 0][r arrow][ital e][sup +][ital e[minus]][ital e+][ital e[minus]]. Subtracting the background from the decay [ital K][sub [ital L]][sup 0][r arrow][ital ee][gamma] and the external conversion of [gamma] in the decays [ital K][sub [ital L]][sup 0][r arrow][gamma][gamma] and [ital K][sub [ital L]][sup 0][r arrow][ital ee][gamma], the branching ratio of the decay [ital K][sub [ital L]][sup 0][r arrow][ital e][sup +][ital e[minus]][ital e+][ital e[minus]] is estimated to be (6[plus minus]2[plus minus]1)[times]10[sup [minus]8]. It is consistent with the previous experimental values.

• OSTI ID: 6654955
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 47:7; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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662350* -- Decays of Mesons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BOSONS
BRANCHING RATIO
DATA
DECAY
EFFECTIVE MASS
ELEMENTARY PARTICLES
ENERGY RANGE
ENERGY RESOLUTION
EXPERIMENTAL DATA
HADRONS
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INTERACTIONS
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KAONS NEUTRAL
KAONS NEUTRAL LONG-LIVED
LEPTONIC DECAY
MASS
MESONS
MEV RANGE
MEV RANGE 100-1000
NUMERICAL DATA
PARTICLE DECAY
PSEUDOSCALAR MESONS
RESOLUTION
STRANGE MESONS
STRANGE PARTICLES
WEAK INTERACTIONS
WEAK PARTICLE DECAY