1994/04/30 by Bao-An Li, Li, Bao-An, Che Ming Ko +3
Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.48550/arxiv.nucl-th/9404028
11 pages, 4 figures available from the authors upon request
arxiv created 1994/04/30 · openalex publication_date 1994/04/30 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the effects of N*(1440) resonance on the production of kaons, antikaons and antiprotons in heavy-ion collisions at subthreshold energies. Using free-space widths for the Δ(1232) and the N*(1440) resonance and free-space thresholds for particle production, it is found that the N*-baryon interactions contribute about 10%, 25% and 80% to the yield of kaon, antikaon and antiproton, respectively. Doubling the widths of resonances due to possible medium effects, both the total and the N* induced antiproton yield decrease by about a factor of 3. Using a reduced antiproton production threshold in a nuclear medium as a result of dropping in-medium nucleon and antiproton masses, the total and the N* induced antiproton yield increase by a factor of 35 and 27, respectively, and the contribution of the N* induced collisions is reduced to about 50% of the total.