Low-energy scattering and photoproduction of $η$-mesons on three-body nuclei

Details Low-energy scattering and photoproduction of $η$-mesons on three-body nuclei Low-energy scattering and photoproduction of $η$-mesons on three-body nuclei

2003-02-19

arxiv.org/abs/nucl-th/0302050v1

Physics

Nuclear Physics

Nuclear Theory

15 pages revtex4 including 7 figures

Scientific paper

10.1103/PhysRevC.68.044002

The optical potential approach for low-energy scattering of $\eta$-mesons on three-body nuclei is compared to an exact treatment of the $\eta 3N$ system using four-body scattering theory with separable interactions in s-waves only. The higher-order terms including the interaction of the struck nucleon with the surrounding nuclear medium and virtual target excitations in between successive $\eta$-scatterings are found to cause important corrections. Effects of final state interaction in $\eta$-photoproduction on $^3$H and $^3$He are also studied and sizable contributions beyond the optical model approach are found.

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