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Study of theω π + system |
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| Authors: | A Alde B Bencheikh F G Binon M Boutemeur C Bricman E G Chikovani S V Donskov M Gouanère S Inaba A V Inyakin V A Kachanov G V Khaustov E A Knapp M Kobayashi A V Kulik G L Landsberg A A Lednev T Nakamura J P Peigneux S A Polovnikov M Poulet Yu D Prokoshkin S A Sadovsky V D Samoylenko P M Shagin A V Shtannikov A V Singovsky J P Stroot V P Sugonyaev M D Tabidze K Takamatsu T Tsuru |
| Institution: | 3. Los Alamos National Laboratory, 87544, Los Alamos, NM, USA 4. Laboratoire d'Annecy de Physique des Particules, F-74019, Annecy-le-Vieux, France 6. Université Libre de Bruxelles, CP 229, B-1050, Brussels, Belgium 7. CERN, CH-1211, Geneva 23, Switzerland 2. Institut Interuniversitaire des Sciences Nucléaires, B-1050, Brussels, Belgium 8. Institute of High Energy Physics, Tbilisi State University, Georgia 1. Institute for High Energy Physics, 142 284, Protvino, Russia 5. National Laboratory for High Energy Physics (KEK), Tsukuba, Ibaraki 305, Japan 9. Miyazaki University, 889-21, Miyazaki, Japan |
| Abstract: | The mass spectra of theω π 0 system, produced inπ ? p charge-exchange reactions at 38 GeV/c and 100 GeV/c, show a new neutral state with a mass of 2200±20 MeV and a width of 260±50 MeV. Likeρ 3(1690), this meson,X(2200), is produced through one-pion-exchange.X(2200)J PC is likely 1??. It might be a 23 D 1 radial-orbital excitation ofρ 0. Its production cross section falls with energy quadratically, in agreement with one-pion-exchange. The cross sections forb 1(1235) andρ 3(1690) production have also been measured; their energy dependences have been determined. |
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