A determination of the total width of the ϒ(9.46) meson
1980; Elsevier BV; Volume: 93; Issue: 4 Linguagem: Inglês
10.1016/0370-2693(80)90375-5
ISSN1873-2445
AutoresH. Albrecht, R. Childers, C.W. Darden, G. Drews, H. Hasemann, E. McCliment, W. Schmidt‐Parzefall, H. Schröder, H.D. Schulz, F. Selonke, E. Steinmann, R. Wurth, W. Hofmann, A. Markees, D. Wegener, Klaus Schubert, J. Stiewe, R. Waldi, S. Weseler, P. Böckmann, L. Jönsson, M. Danilov, Yu. A. Semënov, I. Tichomirov, Yu. Zaitsev,
Tópico(s)High-Energy Particle Collisions Research
ResumoAbstract Using the DASP detector at the DESY storage ring DORIS we have continued measuring e+e− annihilations near and on the ϒ(9.46) resonance. From the cross sections for e+e− → μ+μ− and e+e− → hadrons we obtain a μ+μ− branching ratio for the ϒ(9.46) of (2.9 ± 1.3 ± 0.5) %, a leptonic width г ee = (1.35 ± 0.11 ± 0.22) keV and a total width of (47−15+37 keV.
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