|
|||||
|
|
χ particle production in π?p collisions at 38 GeV/c |
|
| Authors: | F Binon SV Donskov P Duteil M Gouanère AV Inyakin VA Kachanov DB Kakauridze GV Khaustov AV Kulik JP Lagnaux AA Lednev YuV Mikhailov Th Mouthuy JP Peigneux A Possoz YuD Prokoshkin YuV Rodnov VP Sugonyaev |
| Institution: | 1. Institute for High Energy Physics, Serpukhov, USSR.;2. Institut Interuniversitaire des Sciences Nucléaires, Brussels, Belgium.;3. Laboratoire d''Annecy de Physique des Particules, France.;4. CERN, Geneva, Switzerland |
| Abstract: | The production of χ particles in the reaction π?p → χ + … has been studied near threshold. The measurements have been performed at the 70 GeV IHEP proton synchrotron using the hodoscope spectrometer GAMS-2000. The χ particles have been identified through their decay χ → J/ψ + γ, J/ψ → e+e?. In the region XF ?0.4 the fraction of obsered J/ψ particles which is obtained via the decay of χ states is 0.44 ± 0.16. The χ longitudinal and transverse momentum distributions are similar to those obtained for J/ψ. The inclusive production cross section of χ particles (3P1 and 3P2 states) at 38 GeV/c is σXF>0 (π?p → χ + …) = (28±11) nb. |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ | |