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Study of the rare decays K{sub L}{sup 0} {yields} {mu}e, K{sub L}{sup 0}{yields}ee, and K{sub L}{sup 0} {yields} {mu}{mu}

Technical Report:

Abstract

An experimental study of the rare decays K{sub L}{sup 0}{yields}{mu}e, K{sub L}{sup 0}{yields}ee, and K{sub L}{sup 0}{yields}{mu}{mu} was performed at the KEK 12-GeV Proton Synchrotron. No event was observed in the fiducial region for the decay K{sub L}{sup 0} {yields} {mu}e. There was one event in the fiducial region for the decay K{sub L}{sup 0} {yields} ee, which was indistinguishable from the background. Normalizing to the decay K{sub L}{sup 0} {yields} {pi}{sup +}{pi}{sup -}, the upper limits on the branching ratios at 90% confidence level were B(K{sub L}{sup 0} {yields} {mu}e) < 9.4 x 10{sup -11} and B(K{sub L}{sup 0} {yields} ee) < 1.6 x 10{sup -10}. We observed 179 K{sub L}{sup 0} {yields} {mu}{mu} events in the fiducial region, and the branching ratio B(K{sub L}{sup 0} {yields} {mu}{mu}) = [7.9 {+-} 0.6(stat) {+-} 0.3(syst)] x 10{sup -9} was obtained. (author).
Authors:
Komatsubara, T K [1] 
  1. Tokyo Univ. (Japan). Dept. of Physics
Publication Date:
Jun 01, 1992
Product Type:
Technical Report
Report Number:
INS-934
Reference Number:
SCA: 662350; PA: JPN-92:011168; SN: 93000918573
Resource Relation:
Other Information: PBD: Jun 1992
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; KAONS NEUTRAL LONG-LIVED; LEPTONIC DECAY; BRANCHING RATIO; MUONS; ELECTRONS; KEK SYNCHROTRON; EXPERIMENTAL DATA; 662350; DECAYS OF MESONS
OSTI ID:
10111201
Research Organizations:
Tokyo Univ., Tanashi (Japan). Inst. for Nuclear Study
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Other: ON: DE93753247; TRN: JP9211168
Availability:
OSTI; NTIS; INIS
Submitting Site:
JPN
Size:
5 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Komatsubara, T K. Study of the rare decays K{sub L}{sup 0} {yields} {mu}e, K{sub L}{sup 0}{yields}ee, and K{sub L}{sup 0} {yields} {mu}{mu}. Japan: N. p., 1992. Web.
Komatsubara, T K. Study of the rare decays K{sub L}{sup 0} {yields} {mu}e, K{sub L}{sup 0}{yields}ee, and K{sub L}{sup 0} {yields} {mu}{mu}. Japan.
Komatsubara, T K. 1992. "Study of the rare decays K{sub L}{sup 0} {yields} {mu}e, K{sub L}{sup 0}{yields}ee, and K{sub L}{sup 0} {yields} {mu}{mu}." Japan.
@misc{etde_10111201,
title = {Study of the rare decays K{sub L}{sup 0} {yields} {mu}e, K{sub L}{sup 0}{yields}ee, and K{sub L}{sup 0} {yields} {mu}{mu}}
author = {Komatsubara, T K}
abstractNote = {An experimental study of the rare decays K{sub L}{sup 0}{yields}{mu}e, K{sub L}{sup 0}{yields}ee, and K{sub L}{sup 0}{yields}{mu}{mu} was performed at the KEK 12-GeV Proton Synchrotron. No event was observed in the fiducial region for the decay K{sub L}{sup 0} {yields} {mu}e. There was one event in the fiducial region for the decay K{sub L}{sup 0} {yields} ee, which was indistinguishable from the background. Normalizing to the decay K{sub L}{sup 0} {yields} {pi}{sup +}{pi}{sup -}, the upper limits on the branching ratios at 90% confidence level were B(K{sub L}{sup 0} {yields} {mu}e) < 9.4 x 10{sup -11} and B(K{sub L}{sup 0} {yields} ee) < 1.6 x 10{sup -10}. We observed 179 K{sub L}{sup 0} {yields} {mu}{mu} events in the fiducial region, and the branching ratio B(K{sub L}{sup 0} {yields} {mu}{mu}) = [7.9 {+-} 0.6(stat) {+-} 0.3(syst)] x 10{sup -9} was obtained. (author).}
place = {Japan}
year = {1992}
month = {Jun}
}