Author:
Rabe Benjamin,Kämpfer Burkhard
Abstract
We argue for a continuous (dynamical) kinetic freeze-out of K ± , ϕ observed at midrapidity in collisions of Au(1.23 A GeV) + Au. The simulations, by means of a transport model of Boltzmann-Ühling-Uhlenbeck (BUU) type, point to time independent transverse momentum slope parameters after 20 fm/c. The complex interplay of expansion dynamics and strangeness production/exchange/absorption as well as elastic scatterings involved in the reaction network does not support the previous interpretation of a late freeze-out of K − due to larger cross sections.
Reference29 articles.
1. First Evidence for Different Freeze-Out Conditions for Kaons and Antikaons Observed in Heavy-Ion Collisions
2. Deep sub-threshold ϕ production in Au+Au collisions
3. Acceptance and Count Rate Estimates for Experiments on Sub-Threshold phi Meson Production in Central Collisions of C + C at 2 a GeV;Kotte,2002
4. Phi puzzle in heavy ion collisions at 2/A-GeV: How many K- from phi decays?;Kampfer;J. Phys. G,2002
5. Investigating dense nuclear matter with rare hadronic probes;Lorenz;PoS BORMIO,2010