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arXiv 1003.4361hep-ph
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四代人CP破坏的引领作用

Leading Effect of CP Violation with Four Generations

Wei-Shu Hou, Yao-Yuan Mao, Chia-Hsien Shen

摘要:

在含有第四代夸克的标准模型中,我们研究了Jarlskog不变量与4 × 4 CKM矩阵中三角形面积的关系。为了确定可能探测涉及夸克的过程中的CP破坏的主导效应,我们调用小质量和小角度的扩展,并表明这些主导效应大大增强相比,三代的情况下,由大质量的第四代夸克。我们讨论了在几种情况下,特别是大的CP破坏的可能性,在$ b \to s $过程中,这呼应了最近的兴趣,因为实验的提示。

英文摘要:

In the Standard Model with a fourth generation of quarks, we study the relation between the Jarlskog invariants and the triangle areas in the 4-by-4 CKM matrix. To identify the leading effects that may probe the CP violation in processes involving quarks, we invoke small mass and small angle expansions, and show that these leading effects are enhanced considerably compared to the three generation case by the large masses of fourth generation quarks. We discuss the leading effect in several cases, in particular the possibility of large CP violation in $ b \to s $ processes, which echoes the heightened recent interest because of experimental hints.

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