Nucleon spin and its gauge invariance and canonical commutation relation

作者：Wang F^*

来源：International Journal of Modern Physics A, 2005, 20(8-9): 1741-1746.

DOI：10.1142/S0217751X05023268

The nucleon spin structure has been shown to be described by a dynamical constituent quark model with similar to 85% q(3) and similar to 15% q(3)qq Fock components. As a QCD system there is no gauge invariance and canonical commutation relation simultaneously satisfied decomposition of the nucleon spin operator. To keep gauge invariance but give up the canonical commutation relation of the angular momentum operator will ruin the multiple moments expansion and the partial wave decomposition. A weak gauge invariant condition is proposed where the canonical commutation relation of angular momentum operator is intact and the gauge invariance is only true for special sets of matrix elements instead of the operators.

• 出版日期2005-4-10
• 单位南京大学