Measurement of the Electroweak Penguin Process B --> X(s) l+ l-

Preprint

19 August 2002

preprint
Published by arXiv in arXiv

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 a kaon. 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

ELECTROWEAK PENGUIN
PENGUIN PROCESS
INCLUSIVE DECAY
DATA SAMPLE
MESON PAIRS
FIND BR

All Related Versions

Version 1, 2002-08-19, ArXiv
Version 2, 2002-12-26, ArXiv
Published version: Physical Review Letters, 90 (2), 021801.

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