Dynamical freeze-out phenomena: The case of K±,ϕ transverse momentum spectra in collisions of Au(1.23 A GeV) + Au


Dynamical freeze-out phenomena: The case of K±,ϕ transverse momentum spectra in collisions of Au(1.23 A GeV) + Au

Rabe, B.; Kämpfer, B.

We argue on a continuous (dynamical) kinetic freeze-out of K±,ϕ observed at midrapidity in collisions Au(1.23 A GeV) + Au. The simulations by means of a transport model of 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.

Downloads

Permalink: https://www.hzdr.de/publications/Publ-29863
Publ.-Id: 29863