宇宙中可见物质质量起源的接触相互作用模型探究  

Contact interaction model study on the origin of visible mass in the Universe

作　　者：徐阳 康广震 Xu Yang;Kang Guangzhen(School of Physics,Nanjing University,Nanjing,210023,China)

机构地区：[1]南京大学物理学院,南京210023

出　　处：《南京大学学报（自然科学版）》2024年第4期642-650,共9页Journal of Nanjing University（Natural Science）

基　　金：国家自然科学基金(11805097);江苏省自然科学基金(BK20180323,BK20220122)。

摘　　要：关于我们所处的宇宙,尚有许多深刻且未知的问题,在这些问题中,可见物质质量起源的研究尤为基本且意义深远.这些可见物质质量绝大部分都由一个单一的质量量级描述,也就是质子的质量m_(p).随着希格斯(Higgs)粒子的发现,我们已经能够充分解释可见物质中≤1%的“基本”粒子的质量起源,即通过希格斯机制(Higgs Mechanism)获得的质量.根据现有的理论,剩下≥99%的质量是标准模型中强相互作用的一个特有的特征——胶子自相互作用的结果,也就是演生强子质量产生机制(Emergence of Hadronic Mass,EHM).通过一个接触相互作用模型,研究了流夸克质量、有效胶子质量、量子色动力学(Quantum Chromodynamics,QCD)的跑动耦合常数、红外截断和紫外截断对组分夸克质量的影响,探讨这些量的改变对可见物质质量的大小或者宇宙中可见物质呈现形式的影响,为现在的宇宙描述了更多可能的存在形式,加深了我们对宇宙在这些量上取特定值的理解.There are many profound and unknown questions about the Universe.Among them,the research on the origin of the mass of visible matter is particularly fundamental and of far⁃reaching significance.The mass of visible matter is mostly described by a single mass scale,that is,the mass of the proton m_(p).With the discovery of the Higgs particle,we have been able to fully explain the origin of the mass of"fundamental"particles less than or equal to 1%in visible matter,that is,the mass obtained through the Higgs mechanism.The remaining mass,which is greater than or approximately equal to 99%,according to the present theory,is the consequence of gluon self interactions,which is a unique feature of quantum chromodynamics(QCD)—the theory of strong interactions in the standard model,that is,the mass generation mechanism of hadrons⁃EHM(Emergence of Hadronic Mass).In this work,we study the influences of the current quark mass,effective gluon mass,QCD running coupling,infrared as well as ultraviolet cutoffs on the constituent quark mass,by using a contact interaction model,thereby discuss the influences of changing the size of these quantities on the mass of visible matter or the presentations of the visible Universe and describe more forms of the present Universe,which strengthens our understanding of why the Universe takes these specific values on these quantities.

关 键 词：质量起源 希格斯机制 演生强子质量产生机制 接触相互作用模型 

分 类 号：O41[理学—理论物理]