为了解决标准模型中Higgs场的引入带来的平庸性、不自然性等问题，人们提出了许多新物理模型。其中，具有T宇称的最小Higgs（LHT）模型、最简单的小Higgs（SLH）模型、左右双Higgs（LRTH）模型均为流行的新物理候选者。作为已知最重的基本粒子，顶夸克在电弱对称性破缺(EWSB)中扮演着特殊的角色。大型强子对撞机(LHC)是名副其实的顶夸克工厂，每年可以产生几百万甚至上千万个顶夸克对事例，这将为顶夸克性质的精确测量和新物理模型的检验提供理想的场所。本项目主要是结合LHC最新的实验数据，围绕以上三种新物理模型，对顶夸克进行三方面的研究：（1）在LHT、SLH模型和LRTH中研究顶夸克自旋关联；（2）在LHT、SLH和LRTH中研究顶夸克前后不对称；(3) 在LHT模型中研究顶夸克味改变中性流信号。我们希望这些研究能为实验间接检验新物理模型提供理论指导。

To solve the problems of triviality and unnaturalness with the introduction of Higgs field of the Standard Model (SM), people have put forward some new physics models. Some of these new physics models were remained popular candidates, such as the littlest Higgs model with T-parity (LHT), the simplest little Higgs (SLH) model and the left-right twin Higgs (LRTH) model. As the heaviest known fundamental particle, the top quark has taken a unique role in the study of electroweak symmetry breaking.The running Large Hadron Collider (LHC) is a genuine top quark factory, which can produce millions or even tens of millions of top quark pairs per year. It will offer an ideal place for the precision measurements of the top quark properties and testing the new physics. This project closely combines with the current experimental data of the LHC and carry out the phenomenological study in the framework of the new physics models mentioned above, which include three aspects as follows:(1) Study of the top quark spin correlation in the LHT, SLH and LRTH models; (2) Study of the top quark forward-backward asymmetry in the LHT, SLH and LRTH models; (3) Study of the top quark flavor changing neutral current processes in the LHT model. We hope these studies can provide some theoretical guidance for indirect experiment to test the new physics models.