Measurement of the Electroweak Penguin Process B --> X(s) l+ l-
High Energy Physics - Experiment
2008-11-26 v2
Abstract
We report the first measurement of the branching fraction for the inclusive decay B --> X(s) l+ l-, where l is either an electron or a muon and X(s) is a hadronic recoil system that contains an s-quark. We analyzed a data sample of 65.4 * 10**6 B meson pairs collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. We find Br(B --> X(s) l+ l-) = (6.1 +/-1.4(stat) +1.4-1.1(syst)) * 10**(-6) for dilepton masses greater than 0.2 GeV/c**2.
Keywords
Cite
@article{arxiv.hep-ex/0208029,
title = {Measurement of the Electroweak Penguin Process B --> X(s) l+ l-},
author = {J. Kaneko and Belle Collaboration},
journal= {arXiv preprint arXiv:hep-ex/0208029},
year = {2008}
}
Comments
10 pages, 2 figures, to be published in Phys.Rev.Lett