| Autor: |
J.P. Repellin, F. Laplanche, A.D. Liberman, S. Jullian, B. Jean-Marie, G. Sauvage, J. Lefrançois, G. Cosme, G. Parrour |
| Rok vydání: |
1974 |
| Předmět: |
|
| Zdroj: |
Physics Letters B. 48:155-158 |
| ISSN: |
0370-2693 |
| DOI: |
10.1016/0370-2693(74)90667-4 |
| Popis: |
A large solid angle detector has been used to observe π+π−πo events produced at the φ energy by electron-positron collisions in the Orsay storage ring. Fitting our data with a Breit and Wigner curve, with a fixed width Γ = (3.8±0.4) MeV coming from KOSKOL analysis, we deduce σe+e−→π+π−πO = (0.70±0.13) μbat 2E = Mφ. Using our measurements on the other φ decay modes we deduce (φ→π+π−πo)/(φ→KoSKoL) = 0.47±0.06 and (φ→ηoγ)/(φ→KoSKoL) = 0.077±0.022. Assuming (φ→K+K−)/(φ→KoSKoL) = 1.60, we derive σTOT = (4.7±0.4)μb, Γe+e−= (1.27±0.11 keV and g2o/4π = 14.3±1.3 (without finite width correction). Furthermore (from the observation of the ππγ coplanar events) we put an upper limit to the mode e+e− → φ π+π−γ, Γ(φ → π+π−γ) ⩽ 0.007 Γ(φ→Total) with 90% C.L. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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