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

Abstract

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.

10 pages, 13 figures

References in corpus (10)

• Precision study of the eta-3He system using the d+p->3He+eta reaction
• Coupled-channel analysis of the $\omega$-meson production in $\pi N$ and $\gamma N$ reactions for c.m. energies up to 2 GeV
• Measurement of the dp -->3He eta reaction near threshold
• The WASA Detector Facility at CELSIUS
• Study of the $pd{\to }^3\text{He}{K}^{+}{K}^{-}$ and $pd{\to }^3\text{He}\varphi$ reactions close to threshold
• Study of the $\eta$-nucleus interaction in the $pd{\to }^{3}He\eta$ reaction near threshold
• Three-body mechanism of $\eta$ production
• A study of the $pd\to pd\eta$ reaction
• Theoretical Description of the pd -> pd eta Reaction Near Threshold
• Polarisation of the omega meson in the pd-->3He+omega reaction at 1360 and 1450 MeV

Cited by in corpus (5)

• Interaction of eta mesons with nuclei
• Role of vector and pseudoscalar mesons in understanding $1/2^{-}$ $N^{\ast }$ and $\Delta$ resonances
• Measurement of the $\omega \to {\pi }^{+}{\pi }^{-}{\pi }^0$ Dalitz plot distribution
• The pd --> ^3He eta pi0 reaction at T_p = 1450 MeV
• Production of eta and 3pi mesons in the pd->3HeX reaction at 1360 and 1450 MeV