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

2019/11/04 by B. Rabe, B. Kämpfer, Rabe, B. +1
Mathematics · Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Markov Chains and Monte Carlo Methods #Nuclear Theory (nucl-th) #Theoretical and Computational Physics #nucl-th

paper · pdf · doi:10.48550/arxiv.1911.01142

arxiv created 2019/11/04 · openalex publication_date 2019/11/04 · arxiv updated 2019/11/05 · openalex created_date 2022/07/26 · openalex updated_date 2026/07/28

Abstract

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.

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