Branching ratio measurement of the decay K-L -> e(+)e(-)mu(+)mu(-) - art. no. 111802

Citation
A. Alavi-harati et al., Branching ratio measurement of the decay K-L -> e(+)e(-)mu(+)mu(-) - art. no. 111802, PHYS REV L, 8711(11), 2001, pp. 1802
Citations number
8
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
8711
Issue
11
Year of publication
2001
Database
ISI
SICI code
0031-9007(20010910)8711:11<1802:BRMOTD>2.0.ZU;2-H
Abstract
We have collected a 43 event sample of the decay K-L --> e(+)e(-)mu (+)mu ( -) with negligible backgrounds and measured its branching ratio to be (2.62 +/- 0.40 +/- 0.17) X 10(-9). We see no evidence for CP violation in this d ecay. In addition, we set the 90% confidence upper limit on the combined br anching ratios for the lepton flavor violating decays K-L --> e(+/-)e(+/-)m u (-/+)mu (-/+) at B(K-L --> e(+/-)e(+/-)mu (-/+)mu (-/+)) less than or equ al to 1.23 X 10(-10), assuming a uniform phase space distribution.