Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-02-16
Eur.Phys.J. A28 (2006) 213-225
Physics
High Energy Physics
High Energy Physics - Phenomenology
13 pages, including 2 figures and 3 tables, submitted to Eur.Phys.J. A
Scientific paper
10.1140/epja/i2006-10053-5
We show that static properties like the charge radius and the magnetic moment of relativistic three-fermion bound states with instantaneous interactions can be formulated as expectation values with respect to intrinsically defined wavefunctions. The resulting operators can be given a natural physical interpretation in accordance with relativistic covariance. We also indicate how the formalism may be generalized to arbitrary moments. The method is applied to the computation of static baryon properties with numerical results for the nucleon charge radii and the baryon octet magnetic moments. In addition we make predictions for the magnetic moments of some selected nucleon resonances and discuss the decomposition of the nucleon magnetic moments in contributions of spin and angular momentum, as well as the evolution of these contributions with decreasing quark mass.
Haupt Christian
Metsch Bernard
Petry Herbert R.
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