Determination of the Delta++ magnetic dipole moment

Details Determination of the Delta++ magnetic dipole moment Determination of the Delta++ magnetic dipole moment

2000-06-16

arxiv.org/abs/nucl-th/0006031v2

Phys.Lett.B517:339-344,2001

Physics

Nuclear Physics

Nuclear Theory

8 pages, latex Espcrc1.sty, 3 eps figures. Comments are added to the previous version

Scientific paper

10.1016/S0370-2693(01)00980-7

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 m_Delta = 1211.2 \pm 0.4 MeV and Gamma_Delta = 88.2 \pm 0.4 MeV. From a fit to the most sensitive observables in radiative pi+ p scattering, we obtain mu_Delta = 6.14 \pm 0.51 e/2m_p for the magnetic dipole moment of the Delta++.

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