Abstract
The inclusive cross section and polar angle distribution of K+ mesons in Ni + Ni collisions at incident energy 1.93 AGeV are studied using the Quantum Molecular Dynamics model based on the covariant kaon dynamics, and compared with experimental KaoS data from GSI . The calculated K+ yields better fit to experiment data for a soft nuclear equation of state (compression modulus K = 200 MeV) when including the in-medium K+ potential (its value at saturation density is Uk (ρ0) ≈ 30MeV). The calculated results for the polar angle distribution of K+ in Ni + Ni collisions at 1.93 AGeV are slightly more forward and back direction than KaoS data.
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