Determination of the Delta(++) magnetic dipole moment

Citation
Gl. Castro et A. Mariano, Determination of the Delta(++) magnetic dipole moment, PHYS LETT B, 517(3-4), 2001, pp. 339-344
Citations number
37
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
03702693 → ACNP
Volume
517
Issue
3-4
Year of publication
2001
Pages
339 - 344
Database
ISI
SICI code
0370-2693(20011004)517:3-4<339:DOTDMD>2.0.ZU;2-X
Abstract
We study the elastic and radiative pi (+)p scattering within a full dynamic al model which incorporates the finite width effects of the Delta (++). The scattering amplitudes are invariant under contact transformations of the s pin 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 +/- 0.4) MeV and Gamma (Delta) = (88.2 +/- 0.4) MeV. From a fit to the most sensitive observables in radiative Delta (++) scatt ering, we obtain mu (Delta) = (6.14 +/- 0.51)e/2m(p) for the magnetic dipol e moment of the Delta (++). (C) 2001 Elsevier Science B.V. All rights reser ved.