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Baryon Resonances in the Double Pion Channel at Jefferson Lab (CEBAF): Experimental and Physical Analysis Status and Perspectives

  • M. Ripani
Part of the Few-Body Systems book series (FEWBODY, volume 11)

Abstract

The excited baryons made from light quarks are known to decay in single meson as well as in multimeson final states. In particular, the double pion production is sensitive to many excited states of proton and neutron. Quark models predict such decays and also that some resonances could decouple from single meson channels and appear predominantly in multipion production reactions via electromagnetic excitation: the so called “missing resonances”. These issues are part of the CLAS collaboration scientific program at Jefferson Laboratory, where the reaction eNe′ N ππ is being used in the mass region between threshold and 2.2 GeV to investigate baryon resonances and test quark models. In this contribution I will present a framework for the physical interpretation of the data, especially focusing on the approach developed by the Genova-Moscow collaboration. Some very preliminary raw mass distributions collected with CLAS are then shown.

Keywords

Quark Model Invariant Mass Distribution Pion Production Baryon Resonance Partial Wave Expansion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1999

Authors and Affiliations

  • M. Ripani
    • 1
  1. 1.Istituto Nazionale di Fisica NucleareGenovaItaly

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