Journal article

Publication year: 2003

Journal: Physical Review C

Volume number: 67

Issue number: 6

ISSN: 0556-2813

eISSN: 1089-490X

DOI Link: https://doi.org/10.1103/PhysRevC.67.065202

Publisher: American Physical Society

Abstract: 
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 Delta(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 pi(0) and eta mesons, and direct decay of rho(0) and v mesons is necessary to describe the data.

Harvard Citation style: Shyam, R. and Mosel, U. (2003) Role of baryonic resonances in the dilepton emission in nucleon-nucleon collisions, Physical Review C, 67(6), Article 065202. https://doi.org/10.1103/PhysRevC.67.065202

APA Citation style: Shyam, R., & Mosel, U. (2003). Role of baryonic resonances in the dilepton emission in nucleon-nucleon collisions. Physical Review C. 67(6), Article 065202. https://doi.org/10.1103/PhysRevC.67.065202