1998/02/04 by K. Nakayama, Antoni Szczurek, A. Szczurek +3 · 4 citations
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.57.1580
published as Phys.Rev.C57:1580-1587,1998 · 17 pages, 7 figures
arxiv created 1998/02/04 · openalex publication_date 1998/04/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The production of \ensuremathω mesons in proton-proton collisions for proton incident energies up to 2.2 GeV is investigated within a meson-exchange model of hadronic interactions. We find a large cancellation between the dominant \ensuremathπ\ensuremathρ\ensuremathω meson-exchange current and nucleonic current contributions. A comparison with preliminary data from SATURNE calls for the inclusion of off-shell form factors at the NN\ensuremathω and \ensuremathπ\ensuremathρ\ensuremathω production vertices. Due to the present lack of knowledge of these form factors, together with the destructive interference mentioned above, the relative magnitude of the nucleonic and meson-exchange current contributions cannot be determined from existing total cross section data. However, it is shown that the angular distribution of the produced \ensuremathω mesons provides a unique and clear signature of the magnitude of these currents, thus allowing one to disentangle these two basic reaction mechanisms.