Pairwise final state interactions in the p d --> p d eta reaction near threshold

Abstract

A model for the p d --> p d eta reaction published earlier, including the final state interaction (FSI) of all particles, is revisited to investigate the low energy data on this reaction. The three body problem of p-d-eta scattering in the final state is approximated in terms of pairwise interactions between the three particles in the final state. Apart from a comparison with some preliminary data, two new findings relevant to the near threshold data analysis are reported. The first one points toward the limitations of an FSI factor used conventionally to extract the eta-deuteron scattering length and infer subsequently on the existence of eta-mesic states. The second result emphasizes the role of the $p-d$ FSI and the strong Coulomb repulsion near threshold. Finally, a comparison of the above model calculation with low energy data, excludes very large eta-nucleon scattering lengths.

11 pages, 4 figures Accepted for publication in Mod. Phys. Lett. A

References in corpus (14)

• Photoproduction of eta-mesic 3He
• Precision study of the eta-3He system using the d+p->3He+eta reaction
• Coupled-channels study of the ${\pi }^{-}p\to \eta n$ process
• Quantum reflection and dwell times of metastable states
• Level crossing of particle-hole and mesonic modes in eta mesic nuclei
• Formation of eta-mesic nuclei by (pi,N) reaction and N^*(1535) in medium
• Final state interactions in the eta-d system
• Study of the $\eta$-nucleus interaction in the $pd{\to }^{3}He\eta$ reaction near threshold
• Possible eta-mesic 3He states within the finite rank approximation
• Small eta-N scattering lengths favour eta-d and eta-alpha states
• Three-body mechanism of $\eta$ production
• A study of the $pd\to pd\eta$ reaction
• Eta-mesic nuclei in relativistic mean-field theory
• Near threshold eta meson production in dp collisions

Cited by in corpus (1)

• Interaction of eta mesons with nuclei