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The $ηNN$-system at low energy within a three-body approach

A. Fix·H. Arenhoevel
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Abstract

The role of the $ηNN$-interaction is studied in the low energy regime in $η$-deuteron reactions as well as in coherent and incoherent $η$-photoproduction on the deuteron using a three-body model with separable two-body interactions. The three-body approach turns out to be quite essential in the most important lowest partial wave. Results are presented for differential and total cross sections as well as for the $η$-meson spectrum. They differ significantly from those predicted by a simple rescattering model in which only first-order $ηN$- and $NN$-interactions in the final state are considered. The major features of the experimental data of $η$-photoproduction in the near-threshold region are well reproduced.

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A. Fix, H. Arenhoevel. 2001-07-31. The $ηNN$-system at low energy within a three-body approach. https://doi.org/10.1016/s0375-9474(01)01230-1

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