Sideward flow of K+ mesons in Ru+Ru and Ni+Ni reactions near threshold
P. Crochet, N. Herrmann, K. Wisniewski, Y. Leifels, the FOPI collaboration
Abstract
Experimental data on K+ meson and proton sideward flow measured with the FOPI detector at SIS/GSI in the reactions Ru+Ru at 1.69 AGeV and Ni+Ni at 1.93 AGeV are presented. The K+ sideward flow is found to be anti-correlated (correlated) with the one of protons at low (high) transverse momenta. When compared to the predictions of a transport model, the data favour the existence of an in-medium repulsive K+ nucleon potential.
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