Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2002-07-24
Phys.Rev.C66:055212,2002
Physics
Nuclear Physics
Nuclear Theory
41 pages, 26 figures, discussion extended, typos corrected, references updated, to appear in Phys. Rev. C
Scientific paper
10.1103/PhysRevC.66.055212
We present a nucleon resonance analysis by simultaneously considering all pion- and photon-induced experimental data on the final states gamma N, pi N, 2 pi N, eta N, K Lambda, K Sigma, and omega N for energies from the nucleon mass up to sqrt(s) = 2 GeV. In this analysis we find strong evidence for the resonances P_{31}(1750), P_{13}(1900), P_{33}(1920), and D_{13}(1950). The omega N production mechanism is dominated by large P_{11}(1710) and P_{13}(1900) contributions. In this second part we present the results on the photoproduction reactions and the electromagnetic properties of the resonances. The inclusion of all important final states up to sqrt(s) = 2 GeV allows for estimates on the importance of the individual states for the GDH sum rule.
Mosel Ulrich
Penner Gregor
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