In the context of the quark model, a phenomenological expression for the electromagnetic interaction is derived in order to study the polarized structure function of the nucleon. The DHG value without hyperfine corrections and the asymptotic behaviour are reproduced.
12.90 - Miscellaneous theoretical ideas and models
12.40.Aa - Bag models and other phenomenological quark models
13.40.Fn - Electromagnetic form factors electric and magnetic moments
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