Dynamical freeze-out phenomena: The case of $K^\pm, ��$ transverse momentum spectra in collisions of Au(1.23 A GeV) + Au
| Autor: | Burkhard Kämpfer, Benjamin Rabe |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
010308 nuclear & particles physics Nuclear Theory Strangeness production FOS: Physical sciences heavy-ion collisions Kinetic energy 01 natural sciences Spectral line Nuclear physics Nuclear Theory (nucl-th) subthreshold strangeness production 0103 physical sciences Transverse momentum freeze-out Absorption (chemistry) 010306 general physics Nuclear Experiment |
| Zdroj: | Particles 2(2019), 511 Particles Volume 2 Issue 4 Pages 32-528 |
| DOI: | 10.48550/arxiv.1911.01142 |
| Popis: | 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-Ü hling-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 &minus due to larger cross sections. |
| Databáze: | OpenAIRE |
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