München 2006 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

HK: Physik der Hadronen und Kerne

HK 60: Physik mit schweren Ionen

HK 60.1: Gruppenbericht

Freitag, 24. März 2006, 14:00–14:30, D

K⁰ and Λ in heavy-ion collisions at SIS — •Markus Merschmeyer — Physikalisches Institut, Universität Heidelberg

Strange particles are important probes from the hot and dense fireball created in relativistic heavy-ion collisions. In the SIS energy regime the production of these particles occurs close to the free N+N thresholds, therefore their sensitivity to possible changes of hadron properties in the nuclear medium is high. While many analyses of K⁺ and K⁻ have been done in the past, the available data for K_S⁰ and Λ is still scarce. Recently, experiments with Ni+Ni (1.93 AGeV) and Al+Al (1.90 AGeV) have been performed at SIS and large numbers of central events (10⁸) have been measured with the FOPI detector. From those data, K_S⁰ and Λ are reconstructed and analysed. Inverse slope parameters from transverse mass spectra, rapidity densities and total yields of the strange particles will be presented for the two colliding systems. Comparisons of the experimental results to various transport model calculations will be discussed. (Supported by BMBF (06HD154) and GSI (HD-HER))