Isospin dependent kaon and antikaon optical potentials in dense hadronic matter

Abstract

Isospin effects on the optical potentials of kaons and antikaons in dense hadronic matter are investigated using a chiral SU(3) model. These effects are important for asymmetric heavy-ion collision experiments. In the present work, the dispersion relations are derived for kaons and antikaons, compatible with the low-energy scattering data, within our model approach. The relations result from the kaonic interactions with the nucleons, vector mesons, and scalar mesons in the asymmetric nuclear matter. The isospin asymmetry effects arising from the interactions with the vector-isovector {rho} meson as well as the scalar-isovector {delta} mesons are considered. The density dependence of the isospin asymmetry is seen to be appreciable for the kaon and antikaon optical potentials. This dependence can be particularly relevant to the future Facility for Antiproton and Ion Research (FAIR) at GSI, where experiments using neutron-rich beams are planned to be used in the study of compressed baryonic matter.