ILC上Wtb反常耦合的测定
Determination of Wtb anomalous coupling at the ILC
摘要：
本文在有效场论的框架下，对国际直线对撞机上$t\bar{t}$过程中Wtb反常耦合的实验测定进行了研究。该理论预测了几个对耦合特别敏感的观测量，包括底夸克角分布的不对称性。这些观测值需要探测器对b夸克有很好的识别能力。我们描述了所需的工具，特别强调确定的夸克电荷和b-标记连同通用的选择的$t\bar{t}$事件的识别。研究的重点是提供最大统计量的全强子衰变通道。在这项研究中，我们展示了ILC的清洁环境的优势，允许精确测量的可观测量。我们还解释了如何在SiD探测器概念的背景下，将此过程用于ILC探测器的优化
英文摘要：
We present a study of experimental determination of the Wtb anomalous couplings in the $t\bar{t}$ process at the International Linear Collider in the framework of effective field theory. The theory predicts several observables that are particularly sensitive to the couplings including the asymmetry of the bottom quark angular distributions. These observables require excellent identification capabilities for the b quark in a detector. We describe tools needed for the identification with particular emphasis on determination of the quark charge and b-tagging together with generic selections for the $t\bar{t}$ events. The focus of the study is on the all hadronic decay channel which provides the largest statistics. In the study we demonstrate advantages of the clean environment of the ILC that allow a precise measurement of the observables. We also explain how this process can be used for optimisation of ILC detector in the context of the SiD detector concept
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