1994/04/30 by Bao-An Li · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.1103/physrevc.50.2144
published as Phys.Rev.C50:2144-2151,1994 · 18 pages, 11 figures available upon request. TAMU preprint #9404030
arxiv created 1994/04/30 · openalex publication_date 1994/10/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Within a hadronic transport model we study in detail contributions to kaon yields and momentum spectra from various baryon (resonance)-baryon (resonance) and \ensuremathπN interactions in heavy-ion collisions at beam energies near the free-space kaon production threshold. It is found that the finite lifetime of baryon resonances affects significantly the shape of kaon spectra, and the high energy parts of the kaon spectra are dominated by kaons from \ensuremathπN\ensuremath→\ensuremathΛK+ processes. N*(1440) resonances are found to contribute about 10% to the kaon yield. Effects of boosting the Fermi momentum distributions of the two colliding nuclei into their center-of-mass frame, centrality of the reaction, as well as the nuclear equation of state on kaon yields, and spectra are also discussed. Model calculations on the K+ spectra for the reaction of Au+Au at Ebeam/A=1.0 GeV are compared with the experimental data from the KaoS Collaboration.