Zusammenfassung
In view of the precise data available on inclusive polarized electron scattering off polarized proton targets in the nucleon resonance excitation region, we compare these results with the coherent sum of resonant contributions to the polarized structure function g1 and virtual photon asymmetry A(1). To this goal, we employ the nucleon resonance electroexcitation amplitudes determined for photon ...
Zusammenfassung
In view of the precise data available on inclusive polarized electron scattering off polarized proton targets in the nucleon resonance excitation region, we compare these results with the coherent sum of resonant contributions to the polarized structure function g1 and virtual photon asymmetry A(1). To this goal, we employ the nucleon resonance electroexcitation amplitudes determined for photon virtualities Q(2) < 5.0 GeV2 from analyses of the CLAS data on exclusive electroproduction off protons in the resonance region. Most of the well established resonances of four star PDG status in the mass range up to 1.75 GeV are included. We find that the resonance-like structures observed in the inclusive g1 data are related to the resonant contributions in the entire range of photon virtuality Q(2) where the data on g1 are available. In the range of invariant mass of the final hadron system W > 1.5 GeV, the data on the asymmetry A(1) are well reproduced even when accounting for resonant contributions only, especially for the larger values of Q(2) and energies analysed. This observation offers an interesting hint to quark-hadron duality seen in polarized inclusive electron scattering observables.
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