Vector meson angular distributions in proton-proton collisions
Amand Faessler, C. Fuchs, M. I. Krivoruchenko, B. V. Martemyanov
Abstract
The resonance model is used to analyze the omega- and phi-meson angular distributions in proton-proton collisions at sqrts = 2.83 and 2.98 GeV. The assumption of dominant contributions from N*(1720)3/2+ and N*(1900)3/2+ resonances which both have, according to the pi N scattering multichannel partial-wave analysis and/or quark models predictions, dominant p1/2 N-omega decay modes yields the right pattern of the omega angular distribution at sqrts = 2.83 GeV. The angular distribution at sqrts = 2.98 GeV can be reproduced assuming the dominance of N*(2000)5/2+ and N*(1900)3/2+. The experimental phi-meson angular distributions do not shown any asymmetry which requires the existence of a massive negative-parity spin-half resonance. This resonance could be identified with the N*(2090)1/2-.
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