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Measurement of the branching fraction for the decay K→πeν
- Source :
- Physics Letters B. 535:37-42
- Publication Year :
- 2002
- Publisher :
- Elsevier BV, 2002.
-
Abstract
- We present a measurement of the branching ratio BR(KS --> pi e nu) performed using the KLOE detector. KS mesons are produced in the reaction e+ e- --> phi --> KS KL at the DAFNE collider. In a sample of about 5 million KS-tagged events we find 624 +- 30 semileptonic KS decays. Normalizing to the KS --> pi+ pi- count in the same data sample, we obtain BR(KS --> pi e nu) = (6.91 +- 0.37) 10^-4, in agreement with the Standard Model expectation.<br />Comment: 9 pages, 5 Encapsulated Postscript figures. Submitted to Phys. Lett. B
Details
- ISSN :
- 03702693
- Volume :
- 535
- Database :
- OpenAIRE
- Journal :
- Physics Letters B
- Accession number :
- edsair.doi.dedup.....2da11cb8154d7a0a252add1bc5c44aa4
- Full Text :
- https://doi.org/10.1016/s0370-2693(02)01733-1