2003/03/31 by R. Shyam, U. Mosel
Physics and Astronomy · #Baryon #Bremsstrahlung #Delta baryon #Electron #Glauber #High-Energy Particle Collisions Research #Meson #Neutron #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Proton #Quantum Chromodynamics and Particle Interactions #Range (aeronautics) #Scattering #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevc.67.065202
published as Phys.Rev. C67 (2003) 065202 · 22 pages, 7 figures, more details of the calculations added, version to appear in Phys. Rev C
arxiv created 2003/05/09 · openalex publication_date 2003/06/20 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Within an effective Lagrangian model, we present calculations for cross sections of the dilepton production in proton-proton and proton-neutron collisions at laboratory kinetic energies in 1--5 GeV range. Production amplitudes include contributions from the nucleon-nucleon bremsstrahlung as well as from the mechanism of excitation, propagation, and radiative decay of \ensuremathΔ(1232) and N*(1520) intermediate baryonic resonances. It is found that the delta isobar terms dominate the cross sections in the entire considered beam energy range. Our calculations are able to explain the data of the DLS Collaboration on the dilepton production in proton-proton collisions for beam energies below 1.3 GeV. However, for incident energies higher than this the inclusion of contributions from other dilepton sources such as Dalitz decay of \ensuremathπ0 and \ensuremathη mesons, and direct decay of \ensuremathρ0 and \ensuremathω mesons is necessary to describe the data.