Münster 2011 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 8: Schwerionenkollisionen und QCD Phasen II
HK 8.4: Vortrag
Montag, 21. März 2011, 17:45–18:00, HS AP
Analysis of charged Kaon Flow in Ni+Ni collisions at 1.91 AGeV with the FOPI detector — •Victoria Zinyuk — Ruprecht-Karls-Universität Heidelberg
As a consequence of chiral symmetry restoration in hot and dense environment theory suggests a change of the effective kaon mass in medium. The K+ mass is believed to increase slightly and the K− mass drops considerably with increasing baryon density.
These changes are implemented in transport models as an density dependent kaon-nucleon potential which influence the propagation of kaons through the medium after the collision.
Therefor the measurement of charged kaon flow and comparison to the transport models provide information about the presence and magnitude of in-medium-effects on kaons.
In this presentation we show the rapidity, transverse momentum and centrality dependence of the fourier coefficients characterizing the direct (v1) and elliptic (v2) flow of charged kaons[1]. The kaons are produced in Ni+Ni collisions at sub-threshold energies and measured with the FOPI detector.
The flow patterns are compared to the predictions of Hadron-String-Dynamics(HSD) and Isopin Quantum Molecular Dynamics(IQMD) transport approaches.
This work was supported by BMBF 06HD9121I.
[1] S. Voloshin and Y. Zhang, Z. Phys. C70, 665 (1996)