论文标题
解决MFV-Smeft中的风味结构
Resolving the Flavor Structure in the MFV-SMEFT
论文作者
论文摘要
我们从数据中限制了标准模型有效场理论（SMEFT）中威尔逊系数的风味结构。在SMEFT中，通过Cabibbo-Kobayashi-Maskawa混合矩阵相关，在上型和颜色夸克的耦合中，新的物理效果与Quarks的耦合相关。我们利用这种关系来确定对LHC，LEP和$ B $工厂实验的高能量数据的全球分析，以确定潜在的新风味对称性破坏。我们通过执行有效的四夸克和两夸克耦合的结合拟合来证明这种分析的力量，这些耦合有助于大量风味，顶级夸克，electroweak和dijet可观测值。所有四个扇区都需要完全解决四夸克耦合的风味结构，而无需在参数空间中留下盲方向。尽管我们在违反风味的框架中工作，但我们的策略也适用于其他风味模式，例如$ u（2）$风味对称性或leptoquark场景。
We constrain the flavor structure of Wilson coefficients in the Standard Model Effective Field Theory (SMEFT) from data. In the SMEFT, new physics effects in couplings of up-type and down-type quarks are related through the Cabibbo-Kobayashi-Maskawa mixing matrix. We exploit this relation to pin down potential new sources of flavor symmetry breaking in a global analysis of high- and low-energy data from the LHC, LEP, and $b$ factory experiments. We demonstrate the power of such an analysis by performing a combined fit of effective four-quark and two-quark couplings contributing to a large set of flavor, top-quark, electroweak, and dijet observables. All four sectors are needed to fully resolve the flavor structure of the four-quark couplings without leaving blind directions in the parameter space. Although we work in the framework of minimal flavor violation, our strategy applies as well to other flavor patterns, like $U(2)$ flavor symmetry or leptoquark scenarios.
