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arXiv 0912.4494nucl-thhep-exhep-phnucl-ex
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重子的非猝灭夸克模型:磁矩、自旋和轨道角动量

Unquenched quark model for baryons: magnetic moments, spins and orbital angular momenta

R. Bijker, E. Santopinto

摘要:

我们提出了一个重子的非猝灭夸克模型,其中的夸克-反夸克对(上,下和奇怪)的影响被考虑在一个明确的形式通过微观,QCD启发,夸克-反夸克创建机制。在目前的方法中,夸克-反夸克对的贡献可以研究任何初始重子和任何味道的对。结果表明,虽然夸克-反夸克对的加入并不影响重子的磁矩,但轨道角动量对质子和λ超子的自旋有相当大的贡献。

英文摘要:

We present an unquenched quark model for baryons in which the effects of the quark-antiquark pairs (up, down and strange) are taken into account in an explicit form via a microscopic, QCD-inspired, quark-antiquark creation mechanism. In the present approach, the contribution of the quark-antiquark pairs can be studied for any inital baryon and for any flavor of the pairs. It is shown that, while the inclusion of quark-antiquark pairs does not affect the baryon magnetic moments, it leads to a sizeable contribution of the orbital angular momentum to the spin of the proton and the Lambda hyperon.

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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