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Frankfurt 2014 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 42: Schwerionenkollisionen und QCD Phasen

HK 42.2: Talk

Thursday, March 20, 2014, 14:30–14:45, HZ 7

Strange meson spectral functions and cross sections at GSI-FAIR conditions — •Daniel Cabrera1, Laura Tolós2, Jörg Aichelin3, and Elena Bratkovskaya11Institute for Theoretical Physics and Frankfurt Institute for Advanced Studies, Frankfurt University, 60438 Frankfurt am Main, Germany — 2Institut de Ciències de l’Espai (IEEE/CSIC), Campus Universitat Autònoma de Barcelona, Facultat de Ciències, Torre C-5, E-08193 Bellaterra, Spain — 3Subatech, UMR 6457, IN2P3/CNRS, Université de Nantes, École des Mines de Nantes, Nantes, France

We discuss recent progress on the properties of strange mesons in nuclear matter at finite temperature from a chiral unitary approach in coupled channels, which incorporates the s- and p-waves of the kaon nucleon interaction. As a novelty, the in-medium scattering amplitudes and cross sections in several channels (such as K N → π Σ) are obtained in addition to the (off-shell) K and K spectral functions and quasi-particle properties, which is of particular interest for microscopic transport evaluations of strangeness production and propagation in heavy-ion collisions. We overview previous results from the Parton-Hadron-String Dynamics transport approach (PHSD), relying on a G-matrix calculation of strange meson spectral functions within a meson-exchange model. Our understanding of strange meson interactions in nuclear matter within transport simulations is discussed in view of the in-medium cross sections obtained within the chiral unitary approach.

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