论文标题
CP违反三体$ b $衰减：模型Ansatz
CP Violation in Three-body $B$ Decays: A Model Ansatz
论文作者
论文摘要
CP违规的机制仍然是粒子物理学中的难题之一。理解这种现象的关键是非律师$ b $衰变，尤其是多体衰减，这些衰减在各个相空间的各个区域都表现出较大的CP不对称性。这些衰减的基于QCD的完整理论描述仍缺少，需要使用模型来符合数据。在本文中，我们提出了一个模型ANSATZ，该模型反映了通过CKM矩阵违规的潜在物理和已知的CP违规机制。此外，由于CP违规是由带有和不带价魅力夸克的振幅之间的干扰驱动的，因此我们认为开放式阈值的开放在高不变质量区域的违规中可能起重要作用。我们提出了Isobar模型的自然扩展，以结合这些效果。我们建议对非律师三体$ b $衰减数据（包括此扩展）进行分析，这很有趣，因为它可能会给低不变质量和高不变质量的CP违规来源提供新的提示。
The mechanism of CP violation remains one of the puzzles in particle physics. Key to understanding this phenomenon are nonleptonic $B$ decays, especially multibody decays which exhibit large CP asymmetries in various regions of phase space. A full QCD-based theoretical description of these decays is still missing, requiring the use of models to fit the data. In this paper, we suggest a model ansatz which reflects the underlying physics and the known mechanism of CP violation via the CKM matrix. In addition, since CP violation is driven by the interference between amplitudes with and without valence charm quarks, we argue that the opening of the open-charm threshold may play an important role in generating CP violation in the high invariant mass region. We present a natural extension of the isobar model to incorporate these effects. We suggest an analysis of nonleptonic three-body $B$ decay data including this extension, which would be interesting as it may give new hints to the sources of CP violation both at low and high invariant mass.
