We present the results of K± production by using a schematic model that takes into account the nuclear equation-of-state effect and the in-medium modification of the K± masses in hot, dense nuclear matter at √SNN = 3 - 5 GeV. Within the framework of this model, the enhancement of the K+ production by the soft equation-of-state overcomes the suppression by the weak repulsive K+N potential in heavy-ion collisions. The estimated yield ratios of K +/K- agree with the measurements at the Alternating Gradient Synchrotron (AGS) if we assume the freeze-out baryonic density to be about twice the ground-state nuclear-matter density. The model can also reproduce the absolute total multiplicities of K± in central Au + Au collisions with a similar baryonic density. More differential analysis of K± production at this beam energy range will be explored in detail in the future SIS300 heavy-ion synchrotron at Gesellschaft für Schwerionenforschung (GSI), Darmstadt, Germany.
|Number of pages||8|
|Journal||Journal of the Korean Physical Society|
|Publication status||Published - 2004 Oct|
- Heavy-ion collisions
- In-medium effect
ASJC Scopus subject areas
- Physics and Astronomy(all)