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arXiv 1105.3304hep-ph
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与近似Wolfenstein型有关的精确CKM矩阵

An exact CKM matrix related to the approximate Wolfenstein form

Jihn E. Kim, Min-Seok Seo

摘要:

注意到三个混合角之间的层次结构,$θ_{2,3}={\cal O}(θ_1^2)$,我们提出了一个确切的形式的夸克混合矩阵,取代Wolfenstein的近似形式。此外,我们建议旋转幺正三角形,使用弱CP相位约定,其中相位位于(31)元素$\sinθ_1\sinθ_2 e^{iδ}$,而(13)元素$\sinθ_1\sinθ_3$是实数。对于$(ab)$幺正三角形,基线(x轴)由第一行元素$V_{1a}V^*_{1b}$的乘积定义,原点处两边之间的角度定义为相位$δ$。这是一个有用的定义,因为每个Jarlskog三角形在原点处都有一个角$δ$,直接从酉性条件定义。有人认为,$δ$代表的晴雨表弱CP破坏,它可以用来将其与可能的汤川纹理。

英文摘要:

Noting the hierarchy between three mixing angles, $θ_{2,3}={\cal O}(θ_1^2)$, we present an exact form of the quark mixing matrix, replacing Wolfenstein's approximate form. In addition, we suggest to rotate the unitarity triangle, using the weak CP phase convention where the phase is located at the (31) element $\sinθ_1\sinθ_2 e^{iδ}$ while the (13) element $\sinθ_1\sinθ_3$ is real. For the $(ab)$ unitarity triangle, the base line (x-axis) is defined from the product of the first row elements, $V_{1a}V^*_{1b}$, and the angle between two sides at the origin is defined to be the phase $δ$. This is a useful definition since every Jarlskog triangle has the angle $δ$ at the origin, defined directly from the unitarity condition. It is argued that $δ$ represents the barometer of the weak CP violation, which can be used to relate it to possible Yukawa textures.

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