Covariant kaon dynamics and kaon flow in heavy ion collisions

Abstract

The influence of the chiral mean field on the $K^{+}$ transverse flow in heavy ion collisions at SIS energy is investigated within covariant kaon dynamics. For the kaon mesons inside the nuclear medium a quasi-particle picture including scalar and vector fields is adopted and compared to the standard treatment with a static potential. It is confirmed that a Lorentz force from spatial component of the vector field provides an important contribution to the in-medium kaon dynamics and strongly counterbalances the influence of the vector potential on the $K^{+}$ in-plane flow. The FOPI data can be reasonably described using in-medium kaon potentials based on effective chiral models. The information on the in-medium $K^{+}$ potential extracted from kaon flow is consistent with the knowledge from other sources.

24 pages, 6 figures

References in corpus (1)

• Evidence of kaon nuclear and Coulomb potential effects on soft K+ production from nuclei

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• Kaon production from 1 to 40 A GeV
• K+'s Collective Flow in Heavy-ion Collisions predicted by Covariant Kaon Dynamics