Production of $η$ Mesons Near Threshold

Details Production of $η$ Mesons Near Threshold Production of $η$ Mesons Near Threshold

1993-03-11

arxiv.org/abs/hep-ph/9303246v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

(Talk given at the BNL workshop on future directions in particle and nuclear physics at multi-GeV hadron beam facilities, Marc

Scientific paper

It is argued that the strong energy dependence of the $p\, d \rightarrow \,^{3\!}H\!e\, \eta$ cross section near threshold is due to a final state interaction between the $\eta$ meson and the $^3$He nucleus. The large scattering length that this implies is in accord with optical potential predictions and is evidence for a nearby virtual `$\!$`bound'$\!$' state in the $\eta^3$He system. This model suggests that sharp structures should also be seen close to production thresholds on other light nuclei.

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