Abstract
We have studied the production of B mesons in e/sup +/e/sup -/ annihilations and present new measurements of the semileptonic branching fractions for B-meson decay. We find B(B..-->..e..nu..X) = 0.127 +- 0.017 +- 0.013 and B(B..--> mu nu..X) = 0.122 +- 0.017 +- 0.031, where the errors are statistical and systematic, respectively. The observed lepton momentum spectra from B decays are presented. From these spectra we find the mean hadronic mass (M/sub X/) recoiling against the detected lepton to be M/sub X/ = 2.2 +- 0.2 GeV/c/sup 2/. We have also observed an enhancement in the lepton yield from the continuum above BB-bar threshold. This enhancement is interpreted as continuum B production and is consistent with what is expected from the naive quark model.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
