Medium effects in proton-induced $K^0$ production at 3.5 GeV

Abstract

We present the analysis of the inclusive $K^0$ production in p+p and p+Nb collisions measured with the HADES detector at a beam kinetic energy of 3.5 GeV. Data are compared to the GiBUU transport model. The data suggest the presence of a repulsive momentum-dependent kaon potential as predicted by the Chiral Perturbation Theory (ChPT). For the kaon at rest and at normal nuclear density, the ChPT potential amounts to $\approx 35$ MeV. A detailed tuning of the kaon production cross sections implemented in the model has been carried out to reproduce the experimental data measured in p+p collisions. The uncertainties in the parameters of the model were examined with respect to the sensitivity of the experimental results from p+Nb collisions to the in-medium kaon potential.

13 pages, 14 figures

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• Subthreshold Xi- Production in Collisions of p(3.5 GeV)+Nb
• Inclusive Λ production in proton-proton collisions at 3.5 GeV
• Baryonic matter and the medium modification of the baryon masses
• Medium modification of singly heavy baryons in a pion-mean field approach
• Kaon production in the HADES experiment in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=2.4$ GeV