Title
A study of hadronic decays of the Υ{hooked}′
Document Type
Article
Publication Date
8-6-1984
Abstract
We present a detailed study of the decays Υ{hooked}′ → π+π-Υ{hooked} and Υ{hooked}′ → π0π0Υ{hooked}, where the Υ{hooked} decays subsequently to e+e- or μ+μ-. The results are obtained from a sample of 146 000 Υ{hooked}′ decays observed with the CUSB detector at the Cornell Electron Storage Ring. We derive branching fractions of (18.9 ± 2.6)% for Υ{hooked}′ → π′π-Υ{hooked} and (10.3 ± 2.3)% for Υ{hooked}′ → π0π0Υ{hooked}, and determined partial widths for these decays. Invariant mass and angular distributions of both the π+π- and π0π0 systems are presented. We also set a limit on the branching fraction for Υ{hooked}′ → ηΥ{hooked} of less than 0.2% at the 90% confidence level. © 1984.
Publication Source (Journal or Book title)
Nuclear Physics, Section B
First Page
31
Last Page
50
Recommended Citation
Fonseca, V., Mageras, G., Son, D., Dietl, H., Eigen, G., Franzini, P., Han, K., Herb, S., Horstkotte, J., Imlay, R., Klopfenstein, C., Lee-Franzini, J., Levman, G., Lorenz, E., Metcalf, W., Pauss, F., Romero, L., Schamberger, R., Sivertz, M., Spencer, L., Sreedhar, V., Tuts, P., Vogel, H., Youssef, S., & Zhao, T. (1984). A study of hadronic decays of the Υ{hooked}′. Nuclear Physics, Section B, 242 (1), 31-50. https://doi.org/10.1016/0550-3213(84)90131-7