In-Medium Effects on K$^0$ Mesons in Relativistic Heavy-Ion Collisions
Keywords
heavy ion: scattering, argon, potassium: chlorine, K0(S): hadroproduction, pi-: hadroproduction, transverse momentum: momentum spectrum, rapidity spectrum, K0 nucleus: potential, nuclear matter: effect, isospin: quantum molecular dynamics, magnetic spectrometer, experimental results, Darmstadt SIS, 1.756 GeV/nucleon
Abstract
We present the transverse momentum spectra and rapidity distributions of $pi^{-}$ and K$^0_S$ in Ar_s16KCl reactions at a beam kinetic energy of 1.756 A GeV measured with the spectrometer HADES. The reconstructed K$^0_S$ sample is characterized by good event statistics for a wide range in momentum and rapidity. We compare the experimental $pi^{-}$ and K$^0_S$ distributions to predictions by the IQMD model. The model calculations show that K$^0_S$ at low tranverse momenta constitute a particularly well suited tool to investigate the kaon in-medium potential. Our K$^0_S$ data suggest a strong repulsive in-medium K$^0$ potential of about 40 MeV strength.
