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

Abstract : 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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Submitted on : Thursday, January 13, 2011 - 1:58:54 PM
Last modification on : Wednesday, September 16, 2020 - 4:08:19 PM

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G. Agakishiev, A. Balanda, B. Bannier, R. Bassini, D. Belver, et al.. In-Medium Effects on K0 Mesons in Relativistic Heavy-Ion Collisions. Physical Review C, American Physical Society, 2010, 82, pp.044907. ⟨10.1103/PhysRevC.82.044907⟩. ⟨in2p3-00555440⟩

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