A Model for the γNππN Reaction

  • J. A. Gómez Tejedor
  • E. Oset
Part of the Few-Body Systems book series (FEWBODY, volume 9)


We have studied the γNππN reaction using a model which includes N, Δ(1232), N*(1440) and N*(1520) intermediate baryonic states and the ρ-meson as intermediate ππ resonance. The model reproduces fairly well experimental cross sections below E γ = 800 MeV and invariant-mass distributions even at higher energies. One of the interesting findings of the study is that the γ NN*(1520) → Δπ process is very important and interferes strongly with the dominant Δ-Kroll-Ruderman term to produce the experimental peak of the cross section.


Intermediate State Total Cross Section Feynman Diagram Neutral Pion Experimental Cross Section 
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Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • J. A. Gómez Tejedor
    • 1
  • E. Oset
    • 1
  1. 1.Departamento de Física Teórica and IFICCentro Mixto Universidad de Valencia - CSICBurjassot (Valencia)Spain

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