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Baryon resonance analysis from two pion electroproduction at Jefferson Laboratory

  • Marco Ripani
Hadronic resonances
  • 25 Downloads

Abstract.

The cross section for the reaction e pe p π + π - was measured in the resonance region for 1.4<W<2.1 GeV and 0.5<Q 2<1.5 GeV2/c2 using the CLAS detector at Jefferson Laboratory. The data show resonant structures not visible in previous experiments. The comparison of our data to a phenomenological prediction using available information on N * and Δ states shows an evident discrepancy. A better description of the data is obtained either by a sizeable change of the properties of the P 13(1720) resonance or by introducing a new baryon state, not reported in published analyses.

PACS codes.

13.60.Le - Meson production 13.40.Gp - Electromagnetic form factors 14.20.Gk - Baryon resonances with S=0 

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Copyright information

© Società Italiana di Fisica, Springer-Verlag 2004

Authors and Affiliations

  • Marco Ripani
    • 1
  1. 1.INFN, Sezione di Genova, Via Dodecaneso 33, I-16146, Genova, Italy

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