2005/02/23 by H. Müller, H. Mueller, V. Komarov +1
Physics and Astronomy · #High-Energy Particle Collisions Research #Nuclear Physics and Applications #Nuclear physics research studies #nucl-th
paper · pdf · doi:10.1088/0954-3899/31/5/001
published as J.Phys. G31 (2005) 285-293 · 9 pages, 4 figures
arxiv created 2005/02/23 · openalex publication_date 2005/02/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Data from KEK on subthreshold \ mrmp as well as on \π^\± and mrmK^\± production in proton-, deuteron- and \α-induced reactions at energies between 2.0 and 12.0 A GeV for C, Cu and Pb targets are described within a unified approach. We use a model which considers a nuclear reaction as an incoherent sum over collisions of varying numbers of projectile and target nucleons. It samples complete events and thus allows for the simultaneous consideration of all final particles including the decay products of the nuclear residues. The enormous enhancement of the \ mrmp cross section, as well as the moderate increase of meson production in deuteron and \α induced compared to proton-induced reactions, is well reproduced for all target nuclei. In our approach, the observed enhancement near the production threshold is mainly due to the contributions from the interactions of few-nucleon clusters by simultaneously considering fragmentation processes of the nuclear residues. The ability of the model to reproduce the target mass dependence may be considered as a further proof of the validity of the cluster concept.