Electro-excitation amplitudes of the Δ-isobar in the Skyrme model |
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Authors: | H Walliser G Holzwarth |
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Institution: | 1. Fachbereich Physik, Universit?t-GH-Siegen, D-57068, Siegen, Germany
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Abstract: | Electro magnetic transition form factors for the excitation of the Δ33-resonance are evaluated in the Skyrme model. They crucially rely on rotationally induced deformations of the hedgehog soliton which are suppressed by two N C-orders as compared to the leading parts of the isovector current. Partial photon coupling through vector mesons is included in a schematic way. Recoil corrections are approximated by a boost to the equal-velocity frame. The results for the photodecay amplitudes agree with experimental numbers and the shapes of M1, E2, C2— transition form factors show essential features as observed in electro-excitation experiments. |
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