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arXiv nucl-th/0209029nucl-th
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质子动量分布SU(6)破缺比的夸克模型预测

Quark model predictions for the SU(6)-breaking ratio of the proton momentum distributions

M. M. Giannini, E. Santopinto, A. Vassallo, M. Vanderhaeghen

摘要:

质子和中子的反常磁矩之比最近已用质子动量分数之比$M_{2}^{q_{val}}$参数化。这个比率是使用不同的组分夸克模型,从CQM密度分布和计算次到领先的顺序分布。我们表明,这个动量分数$M_{2}^{q_{val}}$比是SU(6)-破缺效应的敏感测试,因此它是有用的,以区分不同的CQM。我们还调查的可能性,得到限制的夸克结构模型的制定。

英文摘要:

The ratio between the anomalous magnetic moments of proton and neutron has been recently parametrized by the ratio of proton momentum fractions $M_{2}^{q_{val}}$. This ratio is evaluated using different constituent quark models, starting from the CQM density distributions and calculating the next-to leading order distributions. We show that this momentum fractions $M_{2}^{q_{val}}$ ratio is a sensitive test for SU(6)-breaking effects and therefore it is useful to distinguish among different CQMs. We investigate also the possibility of getting constraints on the formulation of quark structure models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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