Production of the omega meson in the pd --> 3He omega reaction at 1450 MeV and 1360 MeV

Details Production of the omega meson in the pd --> 3He omega reaction at 1450 MeV and 1360 MeV Production of the omega meson in the pd --> 3He omega reaction at 1450 MeV and 1360 MeV

2009-02-23

arxiv.org/abs/0902.3905v1

Phys.Rev.C79:044002,2009

Physics

Nuclear Physics

Nuclear Experiment

10 pages, 13 figures

Scientific paper

10.1103/PhysRevC.79.044002

The production of $\omega$ mesons in the $pd \to{}^3$He$ \omega$ reaction has been studied at two energies near the kinematic threshold, $T_p=1450$ MeV and $T_p=1360$ MeV. The differential cross section was measured as a function of the $\omega$ cm angle at both energies over the whole angular range. Whereas the results at 1360 MeV are consistent with isotropy, strong rises are observed near both the forward and backward directions at 1450 MeV. Calculations made using a two-step model with an intermediate pion fail to reproduce the shapes of the measured angular distributions and also underestimate the total cross sections.

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