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Role of phi decays for K- yields in relativistic heavy-ion collisions

The production of strange mesons in collisions of Ar+KCl at a kinetic beam energy of 1.756 AGeV is studied within a transport model of Boltzmann-Ühling-Uhlenbeck (BUU) type. In particular, $ϕ, K^+$ and $K^-$ yields and spectra are compared to the data mesured recently by the HADES collaboration and the $ϕ$ yield measured previously by the FOPI collaboration. Our results are in agreement with these data thus presenting an interpretation of the subleading role of $ϕ$ decays into $K^-$'s and confirming the importance of the strangeness-exchange channels for $K^-$ production.

preprint2009arXivOpen access

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