【摘要】：本論文針對在粒子物理標(biāo)準(zhǔn)模型的框架下,加入標(biāo)量場作為暗物質(zhì)粒子,開展理論模型和唯象研究。粒子物理標(biāo)準(zhǔn)模型很好地描述了基本粒子的組成,以及基本粒子間的相互作用,很好地和實驗測量數(shù)據(jù)相吻合,證明是一個成功有效的模型。自上世紀(jì)的天文觀測發(fā)現(xiàn)在宇宙中存在暗物質(zhì),但無法在現(xiàn)有的標(biāo)準(zhǔn)模型下找到合適的候選粒子。因此,暗物質(zhì)扮演了在粒子物理、理論物理、宇宙學(xué)跟天體物理學(xué)的紐帶。目前暗物質(zhì)的相關(guān)研究已經(jīng)成為了粒子物理研究的一個前沿。一方面,粒子物理學(xué)家構(gòu)造新的理論,來預(yù)測符合暗物質(zhì)特征的粒子：另一方面,通過宇宙學(xué)跟天體物理觀測來限制新理論中的粒子的特征以及可能的參數(shù)空間。這篇文章結(jié)構(gòu)安排如下：論文第二章對粒子物理標(biāo)準(zhǔn)模型以及膨脹宇宙的動力學(xué)進(jìn)行了簡單的介紹；第三章對暗物質(zhì)進(jìn)行簡單的介紹,包含模型構(gòu)建、理論計算以及探測；在第四章中,介紹了最簡單的標(biāo)量暗物質(zhì)模型,即在標(biāo)準(zhǔn)模型中加入單態(tài)實標(biāo)量場作為暗物質(zhì),我們討論了模型中暗物質(zhì)的殘余豐度和直接探測截面；隨后,第五章中,我們做了進(jìn)一步的擴(kuò)充,在雙希格斯模型中加入單態(tài)標(biāo)量場作為暗物質(zhì)粒子,做了相應(yīng)的討論跟唯象的研究；最后,對論文做了簡單的總結(jié)。
[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.
【學(xué)位授予單位】：華中師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P145.9

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