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Study of ω-meson production in pp collisions at ANKE |
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| Authors: | S Barsov M Büscher M Hartmann V Hejny A Kacharava I Keshelashvili A Khoukaz V Koptev P Kulessa A Kulikov I Lehmann V Leontyev G Macharashvili Y Maeda T Mersmann S Merzliakov S Mikirtytchyants A Mussgiller D Oellers H Ohm F Rathmann R Schleichert H Seyfarth H Ströher S Trusov Yu Valdau P Wüstner S Yaschenko C Wilkin |
| Institution: | 1. High Energy Physics Department, Petersburg Nuclear Physics Institute, 188350, Gatchina, Russia 2. Institut für Kernphysik, Forschungszentrum Jülich, D-52425, Jülich, Germany 3. Physikalisches Institut II, Universit?t Erlangen-Nürnberg, 91058, Erlangen, Germany 4. High Energy Physics Institute, Tbilisi State University, 0186, Tbilisi, Georgia 5. Institut für Kernphysik, Universit?t Münster, 48149, Münster, Germany 6. Institute of Nuclear Physics, 31342, Cracow, Poland 7. Laboratory of Nuclear Problems, Joint Institute for Nuclear Research, 141980, Dubna, Russia 8. Physics and Astronomy Department, University of Glasgow, Glasgow, UK 9. Research Center for Nuclear Physics, Osaka University, Ibaraki, 567-0047, Osaka, Japan 10. Institut für Kern- und Hadronenphysik, Forschungszentrum Rossendorf, 01314, Dresden, Germany 11. Lomonosov Moscow State University Skobeltsyn Institute of Nuclear Physics, 119992, Moscow, Russia 12. Zentralinstitut für Elektronik, Forschungszentrum Jülich, 52425, Jülich, Germany 13. Physics and Astronomy Department, UCL, WC1E 6BT, London, UK |
| Abstract: | The production of ω-mesons in the pp → ppω reaction has been investigated with the COSY-ANKE spectrometer for excess energies of 60 and 92MeV by detecting the two final protons and reconstructing their missing mass. The large physical background was subtracted using an event-by-event transformation of the proton momenta between the two energies. Differential distributions and total cross-sections were obtained after careful studies of possible systematic uncertainties in the overall ANKE acceptance. The results are compared with the predictions of theoretical models. Combined with data on the φ-meson, a more refined estimate is made of the Okubo-Zweig-Iizuka rule violation in the φ/ω production ratio. |
| Keywords: | 13 75 -n Hadron-induced low- and intermediate-energy reactions and scattering (energy ⩽ 10 GeV) 13 60 Le Meson production 14 40 Cs Other mesons with S = C = 0 mass < 2 5 GeV |
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