Determination of the Delta++ magnetic dipole moment
G. Lopez Castro, A. Mariano
Abstract
We study the elastic and radiative pi+ p scattering within a full dynamical model which incorporates the finite width effects of the Delta++. The scattering amplitudes are invariant under contact transformations of the spin 3/2 field and gauge-invariance is fulfilled for the radiative case. The pole parameters of the Delta++ obtained from the elastic cross section are mDelta = 1211.2 0.4 MeV and GammaDelta = 88.2 0.4 MeV. From a fit to the most sensitive observables in radiative pi+ p scattering, we obtain muDelta = 6.14 0.51 e/2mp for the magnetic dipole moment of the Delta++.
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