Electro - excitation amplitudes of the ∆ - isobar in the Skyrme model
نویسنده
چکیده
Electro magnetic transition form factors for the excitation of the ∆33resonance are evaluated in the Skyrme model. They crucially rely on rotationally induced deformations of the hedgehog soliton which are suppressed by two NC -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 are in perfect agreement with the experimental numbers and the shapes of M1, E2, C2− transition form factors show essential features as observed in electro-excitation experiments. ∗e-mail: [email protected] 1
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