Baryon Resonances in the Double Pion Channel at Jefferson Lab (CEBAF): Experimental and Physical Analysis Status and Perspectives
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 eN -> e'N(pi)(pi) 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.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 793199
- Report Number(s):
- JLAB-PHY-98-14; DOE/ER/40150-2050; hep-ph/9902387; TRN: US0200966
- Journal Information:
- Few Body Syst.Suppl., Vol. 11; Other Information: ECT*/TJNAF Workshop On N* Physics And Nonperturbative QCD,May 1998, Trento, Italy; PBD: 1 May 1999
- Country of Publication:
- United States
- Language:
- English
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