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arXiv 1709.01564hep-lathep-phnucl-th
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重子磁矩:对称性和关系

Baryon magnetic moments: Symmetries and relations

Assumpta Parreno, Martin J. Savage, Brian C. Tiburzi, Jonas Wilhelm, Emmanuel Chang, William Detmold, Kostas Orginos

摘要:

在背景磁场中,用格点量子色动力学计算了八重态重子的磁矩,包括对磁耦合Σ-λ系统的首次处理。虽然计算是在上夸克和下夸克质量相对较大的情况下进行的,但通过在三味质量对称点上工作,我们对磁矩之间的对称性和关系有了新的认识。虽然自旋味对称性在大Nc极限的QCD是由朴素的组分夸克模型共享,我们发现的情况下,夸克模型预测是相当有利于那些出现在大Nc极限。我们建议进一步的计算,以阐明重子磁矩的奇特模式。

英文摘要:

Magnetic moments of the octet baryons are computed using lattice QCD in background magnetic fields, including the first treatment of the magnetically coupled Sigma-Lambda system. Although the computations are performed for relatively large values of the up and down quark masses, we gain new insight into the symmetries and relations between magnetic moments by working at a three-flavor mass-symmetric point. While the spin-flavor symmetry in the large Nc limit of QCD is shared by the naive constituent quark model, we find instances where quark model predictions are considerably favored over those emerging in the large Nc limit. We suggest further calculations that would shed light on the curious patterns of baryon magnetic moments.

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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