phi puzzle in heavy-ion collisions at 2 AGeV: how many K-from phi decays?

preprint2001arXivOpen access

The preliminary experimental data on $ϕ$ production in the reaction Ni(1.93 AGeV) + Ni point to a puzzling high $ϕ$ yield which can not be reproduced with present transport codes. We survey the experimental situation and present prospects for dedicated measurements of the $ϕ$ multiplicities with the $K^+ K^-$ and $e^+ e^-$ channels at HADES and FOPI.

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phi puzzle in heavy-ion collisions at 2 AGeV: how many K-from phi decays?

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