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Three-body mechanism of $η$ production

K. P. Khemchandani·N. G. Kelkar·B. K. Jain
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Abstract

The usefulness of the three-body mechanism of $η$-meson production is tested by extending to high energies a recently developed two step model of the $p d \to ^3$He $η$ reaction by us, which was successful in reproducing the energy dependence of the data near threshold. The $η$ production in this model, proceeds in two steps via the $p p \to πd$ and $πN \to ηp$ reactions with the intermediate particles being off-shell. The final state interaction(FSI) is incorporated through a $T$-matrix for $η^3$He elastic scattering constructed using few body equations. In a comparison of the calculated angular distributions with some recently available data, we discover the limitations of the model at high energies.

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K. P. Khemchandani, N. G. Kelkar, B. K. Jain. 2003-11-09. Three-body mechanism of $η$ production. https://doi.org/10.1103/physrevc.68.064610

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