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In-medium effects on K-0 mesons in relativistic heavy-ion collisions

AuthorsHADES Collaboration; Díaz Medina, José ; Gil Ortiz, Alejandro; Agakishiev, G.; Ramstein, B.
Issue Date29-Oct-2010
PublisherAmerican Physical Society
CitationPhysical Review - Section C - Nuclear Physics 82 (4): 044907 (2010)
AbstractWe present the transverse momentum spectra and rapidity distributions of pi(-) and K-S(0) in Ar + KCl reactions at a beam kinetic energy of 1.756 A GeV measured with the High Acceptance Di-Electron Spectrometer (HADES). The reconstructed K-S(0) sample is characterized by good event statistics for a wide range in momentum and rapidity. We compare the experimental pi(-) and K-S(0) distributions to predictions by the Isospin Quantum Molecular Dynamics (IQMD) model. The model calculations show that K-S(0) at low transverse momenta constitute a particularly well-suited tool to investigate the kaon in-medium potential. Our K-S(0) data suggest a strong repulsive in-medium K-0 potential of about 40 MeV strength.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevC.82.044907
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