Berlin 2005 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 4: Physik mit schweren Ionen

HK 4.1: Gruppenbericht

Freitag, 4. März 2005, 14:00–14:30, TU MA041

Kaon and antikaon production at 1-2AGeV at SIS energies[*] — •Mateusz Płoskoń — GSI Darmstadt, Germany

A survey of experimental data on kaon and antikaon production in Au+Au and Ni+Ni collisions at beam energies between 1 and 2AGeV measured by the KaoS collaboration, will be discussed. Investigations featuring the production cross sections, the multiplicities, the inverse slope parameters and the angular distributions of the mesons in comparison with the transport calculations provide interesting information on their production mechanism and the in-medium potentials[1]. The anisotropy of the azimuthal emission pattern of K⁺ has been regarded as an evidence for a repulsive kaon-nucleon potential in the nuclear medium[2]. The observation of different azimuthal emission patterns for K⁺ and K⁻ obtained from Ni+Ni at 1.93AGeV[3] as well as the results on the elliptic flow of kaons and antikaons as a function of their transverse momenta obtained with the recent Au+Au at 1.5AGeV measurement will be presented.

[*] Supported by BMBF and GSI

[1] A.Förster, F. Uhlig et al., PRL 91 (2003) 152301

[2] Y.Shin et al., PRL 81 (1998) 1576

[3] F.Uhlig, A.Förster et al., submitted