论文标题
风味改变希格斯行业的中性电流
Flavor Changing Neutral Currents in the Higgs Sector
论文作者
论文摘要
这篇综述考虑了具有扩展的希格斯扇区的模型，其中有鳞片介导的树木级变化的中性电流（FCNC）。在简要审查没有树级FCNC的模型之后，讨论了几种具有此类电流的模型。提出了一种流行的质量矩阵Ansatz，其中呈现了改变风味的耦合是单个风味耦合的几何平均值。尽管它为实验者提供了三十年的目标，但现在它受到实验的严重挑战。预计将有O（1）的耦合必须大大较小，而ANSATZ现在不受欢迎。引入了最小的违反风味的假设。然后提出了特定的模型，包括Branco-Grimus-Lavoura模型。这些模型尚未在实验上排除，但是它们具有很高的预测性，一旦发现了重型希格斯玻色子，将进行测试。然后，我们转向重型希格斯玻色子的风味模型和改变风味的衰变，并且显示出许多模型中，重型希格斯可能主要以改变风味的方式衰减（例如$ ct $或$μ的），并鼓励实验者在搜索中包括这些可能性。
This review considers models with extended Higgs sectors in which there are tree-level flavor-changing neutral currents (FCNC) mediated by scalars. After briefly reviewing models without tree-level FCNC, several models with such currents are discussed. A popular mass-matrix ansatz, in which the flavor-changing couplings are the geometric mean of the individual flavor couplings, is presented. While it provided a target for experimentalists for three decades, it in now being severely challenged by experiments. Couplings expected to be of O(1) must be substantially smaller and the ansatz is now not favored. The minimal flavor violation hypothesis is introduced. Then specific models are presented, including the Branco-Grimus-Lavoura models. These models are not yet excluded experimentally, but they are highly predictive and will be tested once heavy Higgs bosons are discovered. We then turn to flavorful models and flavor-changing decays of heavy Higgs bosons, and it is shown that in many of these models, the heavy Higgs could predominantly decay in a flavor-changing manner (such as $ct$ or $μτ$) and experimentalists are encouraged to include these possibilities in their searches.
