The Cabibbo–Kobayashi–Maskawa (CKM) matrix is a key element in describing flavor dynamics in the Standard Model. With only four parameters, this matrix is able to describe a large range of phenomena in the quark sector, such as violation and rare decays. It can thus be constrained by many different processes, which have to be measured experimentally with high accuracy and computed with good theoretical control. Recently, with the advent of the factories and the LHCb experiment taking data, the precision has significantly improved. We review the most relevant experimental constraints and theoretical inputs and present fits to the CKM matrix for the Standard Model and for some topical model-independent studies of New Physics.

中文翻译：

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CKM 参数

Cabibbo–Kobayashi–Maskawa (CKM) 矩阵是描述标准模型中风味动态的关键元素。仅使用四个参数，该矩阵就能够描述夸克扇区中的大量现象，例如违反和稀有衰变。因此，它可能受到许多不同过程的约束，这些过程必须以高精度进行实验测量并通过良好的理论控制进行计算。最近，随着工厂的出现和LHCb实验取数据，精度有了显着提高。我们回顾了最相关的实验约束和理论输入，并提出了与标准模型的 CKM 矩阵和新物理的一些与模型无关的主题研究的拟合。