Mainz 2012 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 37: Schwerionenkollisionen und QCD Phasen
HK 37.3: Vortrag
Mittwoch, 21. März 2012, 17:15–17:30, P 5
In-medium effects of strange particles in π-induced reactions measured with the FOPI detector — •Victoria Zinyuk and Norbert Herrmann — Physikalisches Institut der Universität Heidelberg
Indication for density dependent in-medium modifications of K0/ ± and Λ0 properties have been found in several observables. In SIS energy regime, strange particles are connected by their production mechanism(i.e. strangeness exchange reactions, associated production). Therefore possible modifications of their properties influence the dynamics of the corresponding production partner.
Up to the present no definite conclusion could be drawn on the strength of K±N- and Λ N-potentials.
In π-induced reactions the in-medium potential can be investigated at normal nuclear matter density (ρ=ρ0). The FOPI collaboration has performed two experiments bombarding Carbon, Copper and Lead targets with π− at beam momenta of 1.15 GeV/c and 1.7 GeV/c.
In this presentation we show the differences in population of the phase space(evaluating the momentum distributions) for K0/ ±-mesons and Λ0-baryons produced in heavy and light targets. The results are compared to recent versions of transport model calculations.
This work was supported by BMBF 06HD9121I.