1997/04/02 by W. S. Chung, W.S. Chung, G. Q. Li +3 · 102 citations
Physics and Astronomy · #Baryon #Heavy ion #High-Energy Particle Collisions Research #Ion #Meson #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Production (economics) #Quantum Chromodynamics and Particle Interactions #Resonance (particle physics) #Yield (engineering) #nucl-th
paper · pdf · doi:10.1016/s0375-9474(97)00198-x
published in Nuclear Physics A 625(1-2), 347-371 (Elsevier BV) · 46 pages, including 21 postscript figures
arxiv created 1997/04/02 · openalex publication_date 1997/10/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Phi meson production in heavy-ion collisions at SIS/GSI energies (∼ 2 GeV/nucleon) is studied in the relativistic transport model. We include contributions from baryon-baryon, pion-baryon, and kaon-antikaon collisions. The cross sections for the first two processes are obtained in an one-boson-exchange model, while that for the last process is taken to be of Breit-Wigner form through the phi meson resonance. The dominant contribution to phi meson production in heavy ion collisions at these energies is found to come from secondary pion-nucleon collisions. Effects due to medium modifications of kaon masses are also studied and are found to reduce the phi meson yield by about a factor of two, mainly because of increased phi decay width as a result of dropping kaon-antikaon masses. In this case, the ϕ/K- ratio is about 4%, which is a factor of 2-3 below preliminary experimental data from the FOPI collaboration at GSI. Including also the reduction of phi meson mass in medium increases this ratio to about 8%, which is then in reasonable agreement with the data.