Semileptonic Branching Fraction of Charged and Neutral B Mesons

Abstract

An examination of leptons in ${\rm Y}(4S)$ events tagged by reconstructed $B$ decays yields semileptonic branching fractions of $b_{-}=(10.1\pm 1.8\pm 1.4)\%$ for charged and $b_0=(10.9\pm 0.7\pm 1.1)\%$ for neutral $B$ mesons. This is the first measurement for charged $B$. Assuming equality of the charged and neutral semileptonic widths, the ratio $b_{-}/b_0=0.93\pm 0.18\pm 0.12$ is equivalent to the ratio of lifetimes. A postscript version is available through World-Wide-Web in http://w4.lns.cornell.edu/public/CLNS/1994

9 pages (in REVTEX format) Preprint CLNS94-1286, CLEO 94-16

Cited by in corpus (9)

• Leptonic and Semileptonic Decays of Charm and Bottom Hadrons
• B Mesons
• Resummation of Running Coupling Effects in Semileptonic B Meson Decays and Extraction of $|V_{cb}|$
• Nonleptonic Decays and Lifetimes of b-quark and c-quark Hadrons
• CALCULATION OF THE D AND B MESON LIFETIMES AND THE UNITARITY TRIANGLE PARAMETERS
• Improved Measurement of the B- and B0-bar Meson Lifetimes Using Semileptonic Decays
• PQCD analysis of inclusive semileptonic decays of B mesons
• Study of the B^0 Semileptonic Decay Spectrum at the Upsilon(4S) Resonance
• Spectra of prompt electrons from decays of B+ and B0 mesons and ratio of inclusive semielectronic branching fractions