2002/05/31 by H. Weber, Hans J. Weber, Elena Bratkovskaya +3
Physics and Astronomy · #Baryon #Collision #Hadron #High-Energy Particle Collisions Research #Lambda #Nuclear physics #Nucleus #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Rapidity #Strangeness #Strangeness production #Thermodynamics #Yield (engineering) #nucl-th
paper · pdf · doi:10.1016/s0370-2693(02)02623-0
published as Phys.Lett. B545 (2002) 285-290 · 9 pages, including 3 eps figures, submitted to Phys. Lett. B
arxiv created 2002/09/03 · openalex publication_date 2002/10/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study central collision of Pb + Pb at 20, 40, 80 and 160 A GeV within the UrQMD transport approach and compare rapidity distributions of π−,K+,K− and Λ with the recent measurements from the NA49 Collaboration at 40, 80 and 160 A GeV. It is found that the UrQMD model reasonably describes the data, however, systematically overpredicts the π− yield by ∼20%, whereas the K+ yield is underestimated by ∼15%. The K− yields are in a good agreement with the experimental data, the Λ yields are also in a reasonable correspondence with the data for all energies. We find that hadronic flavour exchange reactions largely distort the information about the initial strangeness production mechanism at all energies considered.