Study of omega-meson production in pp collisions at ANKE

Barsov, S.; Keshelashvili, I.; Maeda, Y.; Khoukaz, A.; Merzliakov, S.; Lehmann, I.; Seyfarth, H.; Trusov, S.; Kulikov, A.; Kacharava, A.; Ströher, H.; Hejny, V.; Kulessa, P.; Wüstner, P.; Mussgiller, A.; Mersmann, T.; Hartmann, M.; Oellers, D.; Rathmann, F.; Büscher, M.; Leontyev, V.; Wilkin, C.; Valdau, Yu.; Koptev, V.; Mikirtichyants, S.; Yaschenko, S.; Schleichert, R.; Macharashvili, G.; Ohm, H.

doi:10.1140/epja/i2006-10161-2

Journal Article

Study of omega-meson production in pp collisions at ANKE

Barsov, S. ; Büscher, M.FZJ* ; Hartmann, M.FZJ* ; Hejny, V.FZJ* ; Kacharava, A. ; Keshelashvili, I.FZJ* ; Khoukaz, A. ; Koptev, V. ; Kulessa, P. ; Kulikov, A. ; Lehmann, I. ; Leontyev, V.FZJ* ; Macharashvili, G. ; Maeda, Y. ; Mersmann, T. ; Merzliakov, S.FZJ* ; Mikirtichyants, S. ; Mussgiller, A. ; Oellers, D.FZJ* ; Ohm, H.FZJ* ; Rathmann, F.FZJ* ; Schleichert, R.FZJ* ; Seyfarth, H.FZJ* ; Ströher, H.FZJ* ; Trusov, S. ; Valdau, Y.FZJ* ; Wüstner, P.FZJ* ; Yaschenko, S. ; Wilkin, C.

2007
Springer Berlin

The European physical journal / A 31, 95 - 104 (2007) [10.1140/epja/i2006-10161-2]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10557 doi:10.1140/epja/i2006-10161-2

Abstract: The production of omega-mesons in the pp --> pp omega reaction has been investigated with the COSY-ANKE spectrometer for excess energies of 60 and 92 MeV 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 phi-meson, a more refined estimate is made of the Okubo-Zweig-Iizuka rule violation in the phi/omega production ratio.

Keyword(s): p p: inelastic scattering ; omega(783): hadroproduction ; threshold ; mass spectrum: missing-mass ; channel cross section: energy dependence ; yield: (Phi(1020) omega(783)) ; Iizuka-Okubo-Zweig rule ; meson: exchange ; nucleon resonance: effect ; magnetic spectrometer: experimental results ; Juelich COSY PS ; p p --> 2p omega(783)