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Semileptonic decay of the B meson |
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| Authors: | C. Klopfenstein J. E. Horstkotte J. Lee-Franzini R. D. Schamberger M. Sivertz L. J. Spencer P. M. Tuts |
| Affiliation: | The State University of New York at Stony Brook, Stony Brook, NY 11794, USA Columbia University, New York, NY 10027, USA Cornell University, Ithaca, NY 14853, USA Louisiana State University, Baton Rouge, LA 70803, USA Max Planck Institut für Physik, D-8000, Munich 40, Fed. Rep. Germany |
| Abstract: | Using the CUSB detector we have measured the production of electrons from the decay B→eνX. We obtain a branching ratio for B→eνX of (13.2±0.8±1.4)%. The observed energy spectrum of the electrons implies that the coupling (bc)W dominates over (bu)W. An upper limit Γ(B→eνXu)/Γ(B→eνXc)<5.5% at 90% confidence level is obtained, where Xc contains a c-quark and Xu contains no charmed particles. |
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