In-Medium Effects on K0 Mesons in Relativistic Heavy-Ion Collisions

Details In-Medium Effects on K0 Mesons in Relativistic Heavy-Ion Collisions In-Medium Effects on K0 Mesons in Relativistic Heavy-Ion Collisions

2010-04-22

arxiv.org/abs/1004.3881v2

Physics

Nuclear Physics

Nuclear Experiment

10 pages, 10 figures, accepted by Phys. Rev. C

Scientific paper

We present the transverse momentum spectra and rapidity distributions of $\pi^{-}$ and K$^0_S$ in Ar+KCl 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.

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