Near-threshold production of omega mesons in the pn -> d omega reaction
S. Barsov, I. Lehmann, R. Schleichert, C. Wilkin, M. Buescher, S. Dymov, Ye. Golubeva, M. Hartmann, V. Hejny, A. Kacharava, I. Keshelashvili, A. Khoukaz, V. Komarov, L. Kondratyuk, N. Lang, G. Macharashvili, T. Mersmann, S. Merzliakov, A. Mussgiller, M. Nioradze, A. Petrus, H. Stroeher, Y. Uzikov, B. Zalikhanov
Abstract
The first measurement of the p n -> d omega total cross section has been achieved at mean excess energies of Q = 28 and 57 MeV by using a deuterium cluster-jet target. The momentum of the fast deuteron was measured in the ANKE spectrometer at COSY-Juelich and that of the slow "spectator" proton p(sp) from the p d -> p(sp) d omega reaction in a silicon telescope placed close to the target. The cross sections lie above those measured for p p -> p p omega but seem to be below theoretical predictions.
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