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On the Polarization Dependence of Electromagnetic Vertex for Proton

C. B. Yang, X. Cai

hep-pharXiv:hep-ph/9612368

Abstract

The polarization dependence of the electromagnetic vertex for polarized proton is discussed. Such a dependence is shown to be a result of gluon polarization and gluon interactions with the constituents within proton. One more form factor is introduced to give such a dependence in the electromagnetic vertex for proton. Due the polarization dependence of the vertex, a nonzero single-spin asymmetry for unpolarized lepton scattering off transversely polarized proton is predicted.

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