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arXiv 0903.2880hep-ph
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夸克和轻子混合矩阵的统一三极小参数化

Unified triminimal parametrizations of quark and lepton mixing matrices

Xiao-Gang He, Shi-Wen Li, Bo-Qiang Ma

摘要:

本文详细研究了夸克和轻子混合矩阵在不同基矩阵下的三极小参数化。我们首先讨论了混合矩阵的triminimal展开和利用夸克-轻子互补性(QLC)实现夸克和轻子参数化的可能性。然后,我们考虑了几个有趣的基础矩阵和比较的triminimal参数化与Wolfenstein的参数化。夸克混合的沃尔芬斯坦参数化通常是以单位矩阵为基础的三极小展开。相应的QLC轻子混合矩阵是围绕双极大基的三极小展开。当前的中微子振荡数据表明,轻子混合矩阵可以很好地用三双峰混合表示。把它作为一个扩展的基础是很自然的。在这种情况下,相应的零阶夸克混合基使得triminimal展开比通常的Wolfenstein参数化收敛得快得多。基于三-双极大混合的三极小展开可以转化为文献中讨论的Wolfenstein型参数化。因此,我们有一个统一的描述夸克和轻子扇区的不同类型的参数化:标准参数化,Wolfenstein类参数化,和triminimal参数化。

英文摘要:

We present a detailed study on triminimal parametrizations of quark and lepton mixing matrices with different basis matrices. We start with a general discussion on the triminimal expansion of the mixing matrix and on possible unified quark and lepton parametrization using quark-lepton complementarity (QLC). We then consider several interesting basis matrices and compare the triminimal parametrizations with the Wolfenstein-like parametrizations. The usual Wolfenstein parametrization for quark mixing is a triminimal expansion around the unit matrix as the basis. The corresponding QLC lepton mixing matrix is a triminimal expansion around the bimaximal basis. Current neutrino oscillation data show that the lepton mixing matrix is very well represented by the tri-bimaximal mixing. It is natural to take it as an expanding basis. The corresponding zeroth order basis for quark mixing in this case makes the triminimal expansion converge much faster than the usual Wolfenstein parametrization. The triminimal expansion based on tri-bimaximal mixing can be converted to the Wolfenstein-like parametrizations discussed in the literature. We thus have a unified description between different kinds of parametrizations for quark and lepton sectors: the standard parametrizations, the Wolfenstein-like parametrizations, and the triminimal parametrizations.

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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