Measurement of B-Meson semileptonic decay
Document Type
Article
Publication Date
1-1-1981
Abstract
Using the Colubia University-Stony Brook detector we have measured the production of energetic electrons (E>1 GeV) in e+e- annihilations in the center-of-mass energy range 10.4 to 11.4 GeV. We observe an enhanced electron signal at the ′′′(4S) resonance, which we interpret as evidence for the β decay of a new flavor of quark, b, bound within a new flavor meson, B. We derive a branching ratio for B→Xeν of (13.6 ± 2.5 ± 3)%. The observed energy spectrum of the electrons favors the decay b→ceν over b→ueν. © 1981 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
First Page
771
Last Page
774
Recommended Citation
Spencer, L., Fincchiaro, G., Lee-Franzini, J., Giannini, G., Schamberger, R., Sivertz, M., Tuts, P., Böhringer, T., Costantini, F., Dobbins, J., Franzini, P., Han, K., Herb, S., Lederman, L., Mageras, G., Peterson, D., Rice, E., Yoh, J., Imlay, R., Levman, G., Metcalf, W., Sreedhar, V., Blanar, G., Dietl, H., Eigen, G., Lorenz, E., Pauss, F., & Vogel, H. (1981). Measurement of B-Meson semileptonic decay. Physical Review Letters, 47 (11), 771-774. https://doi.org/10.1103/PhysRevLett.47.771