Chiral kaon dynamics in heavy ion collisions

Abstract

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.

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

References in corpus (8)

• Kaons in dense matter, kaon production in heavy-ion collisions, and kaon condensation in neutron stars
• Kaon production in heavy-ion collisions and maximum mass of neutron stars
• Analysis of Kaon Production at SIS Energies
• Enhanced Out-of-plane Emission of K+ Mesons observed in Au+Au Collisions at 1 AGeV
• Consequences of covariant kaon dynamics in heavy ion collisions
• Origin of subthreshold K^+ production in heavy ion collisions
• Role of the Coulomb interaction in the flow and the azimuthal distribution of kaons from heavy ion reactions
• Radial flow of kaon mesons in heavy ion reactions

Cited by in corpus (2)

• Covariant kaon dynamics and kaon flow in heavy ion collisions
• The role of three-body collisions in phi-meson production processes near threshold