标量暗物质模型研究
发布时间：2018-10-21 13:49
【摘要】：本论文针对在粒子物理标准模型的框架下,加入标量场作为暗物质粒子,开展理论模型和唯象研究。粒子物理标准模型很好地描述了基本粒子的组成,以及基本粒子间的相互作用,很好地和实验测量数据相吻合,证明是一个成功有效的模型。自上世纪的天文观测发现在宇宙中存在暗物质,但无法在现有的标准模型下找到合适的候选粒子。因此,暗物质扮演了在粒子物理、理论物理、宇宙学跟天体物理学的纽带。目前暗物质的相关研究已经成为了粒子物理研究的一个前沿。一方面,粒子物理学家构造新的理论,来预测符合暗物质特征的粒子：另一方面,通过宇宙学跟天体物理观测来限制新理论中的粒子的特征以及可能的参数空间。这篇文章结构安排如下：论文第二章对粒子物理标准模型以及膨胀宇宙的动力学进行了简单的介绍；第三章对暗物质进行简单的介绍,包含模型构建、理论计算以及探测；在第四章中,介绍了最简单的标量暗物质模型,即在标准模型中加入单态实标量场作为暗物质,我们讨论了模型中暗物质的残余丰度和直接探测截面；随后,第五章中,我们做了进一步的扩充,在双希格斯模型中加入单态标量场作为暗物质粒子,做了相应的讨论跟唯象的研究；最后,对论文做了简单的总结。
[Abstract]:In this paper, the theoretical model and phenomenological research are carried out by adding scalar field as dark matter particle in the framework of particle physics standard model. The standard model of particle physics well describes the composition of elementary particles and the interaction between elementary particles, which is in good agreement with the experimental data, and proves to be a successful and effective model. Since the last century astronomical observations have found that dark matter exists in the universe, but it is impossible to find suitable candidate particles under existing standard models. Thus, dark matter acts as a link between particle physics, theoretical physics, cosmology and astrophysics. At present, the research of dark matter has become a frontier in particle physics. On the one hand, particle physicists construct new theories to predict particles that conform to the characteristics of dark matter; on the other hand, the characteristics of particles in the new theory and possible parameter spaces are limited by cosmological and astrophysical observations. The structure of this paper is as follows: in chapter 2, the standard model of particle physics and the dynamics of the expanding universe are briefly introduced, and in the third chapter, the dark matter is briefly introduced, including model construction, theoretical calculation and detection. In chapter 4, the simplest scalar dark matter model is introduced, that is, the single state real scalar field is added to the standard model as dark matter. We discuss the residual abundance and direct detection cross section of the dark matter in the model. We further extend the double Higgs model by adding a single state scalar field as a dark matter particle, and make a corresponding discussion and phenomenological study. Finally, a brief summary of the paper is given.
【学位授予单位】：华中师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P145.9
[Abstract]:In this paper, the theoretical model and phenomenological research are carried out by adding scalar field as dark matter particle in the framework of particle physics standard model. The standard model of particle physics well describes the composition of elementary particles and the interaction between elementary particles, which is in good agreement with the experimental data, and proves to be a successful and effective model. Since the last century astronomical observations have found that dark matter exists in the universe, but it is impossible to find suitable candidate particles under existing standard models. Thus, dark matter acts as a link between particle physics, theoretical physics, cosmology and astrophysics. At present, the research of dark matter has become a frontier in particle physics. On the one hand, particle physicists construct new theories to predict particles that conform to the characteristics of dark matter; on the other hand, the characteristics of particles in the new theory and possible parameter spaces are limited by cosmological and astrophysical observations. The structure of this paper is as follows: in chapter 2, the standard model of particle physics and the dynamics of the expanding universe are briefly introduced, and in the third chapter, the dark matter is briefly introduced, including model construction, theoretical calculation and detection. In chapter 4, the simplest scalar dark matter model is introduced, that is, the single state real scalar field is added to the standard model as dark matter. We discuss the residual abundance and direct detection cross section of the dark matter in the model. We further extend the double Higgs model by adding a single state scalar field as a dark matter particle, and make a corresponding discussion and phenomenological study. Finally, a brief summary of the paper is given.
【学位授予单位】：华中师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P145.9
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