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arXiv 1707.02255hep-ph
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协变手征微扰理论中八重态重子电磁形状因子的系统研究

Systematic study of octet-baryon electromagnetic form factors in covariant chiral perturbation theory

Astrid N. Hiller Blin

摘要:

本文利用SU(3)手征微扰理论的全协变方法,在O(p^3)处对八重态重子的形状因子进行了完整而系统的计算。我们使用扩展的质量壳重整化方案,并明确地包括矢量介子和自旋3/2十重态中间态。通过将这些预测与包括磁矩、电荷和磁半径在内的数据进行比较,我们确定了未知的低能常数,并对尚未测量到的可观测量进行了预测,如西格马^0的磁矩、超子的电荷和磁半径。

英文摘要:

We perform a complete and systematic calculation of the octet-baryon form factors within the fully covariant approach of SU(3) chiral perturbation theory at O(p^3). We use the extended on-mass shell renormalization scheme, and include explicitly the vector mesons and the spin-3/2 decuplet intermediate states. Comparing these predictions with data including magnetic moments, charges, and magnetic radii, we determine the unknown low-energy constants, and give predictions for yet unmeasured observables, such as the magnetic moment of the Sigma^0, and the charge and magnetic radii of the hyperons.

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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