Nuclear in-medium effects of strange particles in proton-nucleus collisions
Abstract
Dynamics of strange particles produced in proton induced nuclear reactions near threshold energies has been investigated within the Lanzhou quantum molecular dynamics (LQMD) transport model. The in-medium modifications on particle production in dense nuclear matter are considered through corrections on the elementary cross sections via the effective mass and the mean-field potentials. It is found that the attractive antikaon-nucleon potential enhances the subthreshold K production and also influences the structure of inclusive spectra. The strangeness production is strongly suppressed in proton induced reactions in comparison to heavy-ion collisions. The measured K-/K+ ratios in the 12C+12C and p+12C collisions from KaoS collaboration have been well explained with inclusion of the in-medium potentials.
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