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Production of $η$ Mesons Near Threshold

Colin Wilkin
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Abstract

It is argued that the strong energy dependence of the $p\, d \rightarrow \,^{3\!}H\!e\, η$ cross section near threshold is due to a final state interaction between the $η$ 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 $η^3$He system. This model suggests that sharp structures should also be seen close to production thresholds on other light nuclei.

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Colin Wilkin. 1993-03-11. Production of $η$ Mesons Near Threshold. https://arxiv.org/abs/hep-ph/9303246

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