Abstract
Relativistic calculations of the effects of the pion cloud on the electromagnetic properties of the nucleon are presented. Light-cone formalism is used to construct the physical nucleon wave function that contains two components: a bare nucleon and a pion associated by recoil baryon with the nucleon or delta quantum numbers. Both sectors are coupled by a relativistic light-cone interaction Hamiltonian. A perturbative treatment is used to solve for the physical nucleon state. The elastic electromagnetic nucleon form factorsGp,nE(Q2) andGp,nM(Q2) are computed in terms of matrix elements of current operator and the nucleon wave function. TheQ2-dependence of contributions to the nucleon form factor from the various sectors of the model space is calculated and compared. The nature of the observed deviations from form- factor scaling and dipole parametrization is discussed.
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