Abstract
We present a possible explanation for the deep sub-threshold, ϕ and production yields measured with the HADES experiment in Ar+KCl reactions at A GeV and present predictions for Au+Au reactions at A GeV. To explain the surprisingly high yields of ϕ and hadrons we propose new decay channels for high mass baryon resonances. These new decay channels are constrained by elementary cross sections, and production in p+Nb. Based on the fits to the elementary reactions one obtains a satisfactorily description of ϕ and production in deep sub-threshold Ar+KCl reactions as well as the observed nuclear transparency ratio in proton-induced ϕ production in cold nuclear matter. The results implicate that no new medium effects are required to describe the rare strange particle production data in low energy nuclear collisions.
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