- Conference date: 17–20 May 2011
- Location: Newport News, VA, USA
Transition helicity amplitudes γνNN* (electrocouplings) were determined for prominent excited proton states with masses below 1.8 GeV in independent analyses of major meson electroproduction channels: , and . Consistent results on resonance electrocouplings obtained from analyses of these exclusive reactions with different non-resonant contributions demonstrate reliable extraction of these fundamental quantities for states that have significant decays for either Nπ or Nππ channels. Preliminary results on electrocouplings of N* states with masses above 1.6 GeV have become available from the CLAS data on electroproduction off protons for the first time. Comparison with quark models and coupled-channel approaches strongly suggest that N* structure is determined by contributions from an internal core of three constituent quarks and an external meson-baryon cloud at the distances covered in these measurements with the CLAS detector.
- Coupled channel methods
- Data analysis
- Electroproduction reactions
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