e+e- pair production from nucleon targets in the resonance region

2004/02/26 by Madeleine Soyeur, Matthias Lutz, Soyeur, Madeleine +2
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/0402095

6 pages, 6 figures, Paper presented at Hirschegg 2004, 'Probing nuclei and nucleons with electrons and photons', January 12th-16th, 2004

arxiv created 2004/02/26 · openalex publication_date 2004/02/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present consistent theoretical descriptions of the πN → e⁺e^- N and γN → e⁺e^- N reactions on proton and neutron targets for total center of mass energies √ s ranging between 1.50 GeV and 1.75 GeV. These reactions are complementary to study the coupling of low-lying baryon resonances to vector meson-nucleon channels. We show in particular how the resonant structure of the amplitudes for both processes generates specific and large quantum interferences between ρ- and ω-meson decays into e⁺e^- pairs. Data on the πN → e⁺e^- N and γN → e⁺e^- N reactions are expected in the near future from the HADES program at GSI and from dilepton studies with CLAS at JLab.

Related

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• The reaction πN → ωN in a dynamical coupled-channel approach