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arXiv 0904.4894hep-ph
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手征微扰理论中重子八重态磁矩的SU(3)破缺修正

SU(3)-breaking corrections to the baryon-octet magnetic moments in chiral perturbation theory

J. Martin Camalich, L. Alvarez-Ruso, L. S. Geng, M. J. Vicente Vacas

摘要:

本文采用协变手征微扰理论,在包含中间八重态和十重态贡献的扩展质量壳重整化方案下,计算了重子磁矩。通过拟合两个可用的低能常数,当我们包括来自最低阶环的主导SU(3)破缺效应时,我们改进了对数据的Coleman-Schmidhow描述。我们比较了重子和协变红外手征微扰理论在相同量级上的应用,并讨论了差异的来源。

英文摘要:

We report a calculation of the baryon magnetic moments using covariant chiral perturbation theory within the extended-on-mass-shell renormalization scheme including intermediate octet and decuplet contributions. By fitting the two available low-energy constants, we improve the Coleman-Glashow description of the data when we include the leading SU(3) breaking effects coming from the lowest-order loops. We compare with previous attempts at the same order using heavy-baryon and covariant infrared chiral perturbation theory, and discuss the source of the differences.

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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