1998/12/01 by C. Fuchs, Amand Faessler, Z. S. Wang +1 · 1 citation
Physics and Astronomy · #nucl-th
paper · pdf · doi:10.1016/s0146-6410(99)00074-5
published as Prog.Part.Nucl.Phys. 42 (1999) 197-206 · 10 pages, 5 PS-figures, Proceedings of the Erice School on Nuclear Physics in Erice, Sicily, Italy, September 17 -25 1998; to be published in Progress in Particle and Nuclear Physics Vol. 42
arxiv created 1998/12/01 · arxiv updated 2009/12/01
The influence of the chiral mean field on the collective motion of kaons in relativistic heavy ion reactions at SIS energies is investigated. We consider three types of collective motion, i.e. the transverse flow, the out-of-plane flow (squeeze-out) and the radial flow. The kaon dynamics is thereby described with a relativistic mean field as it originates form chiral lagrangiens. For the K mesons inside the nuclear medium we adopt a covariant quasi-particle picture including scalar and vector fields and compare this to a treatment with a static potential like force. The comparison to the available data (K+) measured by FOPI and KaoS strongly favor the existence of an in-medium potential. However, using full covariant dynamics makes it more difficult to describe the data which might indicate that the mean field level is not sufficient for a reliable description of the kaon dynamics.