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arXiv 0906.2670hep-ph
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CKM矩阵重整化的新公式

Novel formulations of CKM matrix renormalization

B. A. Kniehl, A. Sirlin

摘要:

本文综述了最近提出的两个在壳层上的方案,用于标准模型中Cabibbo-Kobayashi-Maskawa(CKM)夸克混合矩阵的重整化。首先构造规范无关的质量反项矩阵的上,下型夸克遵守厄米性的完整的质量矩阵。后者的对角化,然后导致明确的表达CKM counterterterm矩阵,这是规范独立的,保持幺正性,并导致重整化的振幅是非奇异的限制,其中任何两个夸克成为质量简并。其中一个方案还自动满足了风味民主。

英文摘要:

We review two recently proposed on-shell schemes for the renormalization of the Cabibbo-Kobayashi-Maskawa (CKM) quark mixing matrix in the Standard Model. One first constructs gauge-independent mass counterterm matrices for the up- and down-type quarks complying with the hermiticity of the complete mass matrices. Diagonalization of the latter then leads to explicit expressions for the CKM counterterm matrix, which are gauge independent, preserve unitarity, and lead to renormalized amplitudes that are non-singular in the limit in which any two quarks become mass degenerate. One of the schemes also automatically satisfies flavor democracy.

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