τ轻子CP破坏效应的研究

粒子物理标准模型虽然包含了CP破坏,但其不足以解释宇宙中观察到的物质与反物质不对称现象,因此进一步检验标准模型中的CP破坏机制、寻找CP破坏的新起源已经成为粒子物理研究的重要内容之一.分析LHC实验上构造CP-odd可观测量的困难,在此基础上,进一步提出了CP-odd可观测量的构造方法,接着按照量子场论的基本原理,构造了τ轻子CP破坏的有效拉氏量,从而为研究与τ轻子相关的新物理提供一些理论指导.     

物质世界与反物质世界

论述日常物质世界的微观组成和和物质世界三家族;介绍反粒子,反氘核及反氢原子的发现;探讨宇宙大爆炸时产生反物质的可能以及通古其卡大爆炸之谜。     

代非普适Z′模型中τ~-→μ~-(e~-)KK衰变

研究τ轻子味破缺衰变,有助于探索超出标准模型的具有轻子味破缺(LFV)机制的新物理.在代非普适Z′模型中,对τ~-→μ~-(e~-)KK衰变进行了研究,考虑了共振和非共振的贡献以及来自B介子衰变的限制,结果表明:在现有的参数范围内,这些衰变的分支比都能达到目前的实验上限.最新的实验上限将模型参数B_(τμ(τe))~(L(R))限制在O(10~(-3)).其中,s夸克末态的贡献远大于u(d)夸克末态的贡献,共振部分形状因子的贡献最大.分析了τ~-→μ~-(e~-)KK微分衰变率与双K介子不变质量s~(1/2)(s=m~2KK)的关系.在双K介子不变质量范围内,矢量介子φ(1020)共振占主要地位,τ~-→μ~-KK衰变的共振峰比τ~-→e~-KK衰变的共振峰高.     

τ~-→μ~-Ф(ω)衰变与新物理企鹅图效应

τ-→μ-Ф(ω)衰变可用来探测超出标准模型的具有轻子味破缺(LFV)的新物理.在双黑格斯二重态模型Ⅲ(2HDMⅢ)下对这些衰变的企鹅图效应作了研究,结果表明在一定的参数范围内,企鹅图的贡献可将衰变分支比提高到目前的实验上限,其中光子企鹅图的贡献占主要地位.     

G-W-S标准模型与三代夸克、轻子质量公式

利用量子场论、G-W-S标准模型su(5)模型及混沌理论,分析了三代轻子、夸克的经验公式,并揭示了me、mμ、mτ及mq之间的内在联系.     

量子电动力学中重整化群方程的新计算

对量子电动力学中重整休群方程作了新的研究。把所有的荷电轻子和夸克都计入之后，对跑动耦合常数从Ｑ＝０起一直算到Ｑ＝ｍｚ使符合实验数据，这样给出（ｕ，ｄ，ｓ）的平均质量为９２ＭｅＶ。     

CERN的LEPe^＋e^—对撞机的ι^＋ι^—γγ事件中的轻子激发态

我们建议;最近由L3蛆报告的60GeV新粒子是来轻子激发态的衰变。对实验数据的分析支持这一建议。我们估计M_μ·78.8GeV,M_c·88GeV。还提出了些有待进一步实验检验的预言。     

Gauge field theory of quantum and the mass empirical formulas of lepton and quarks

In this paper, we discuss the mathematical relation determined by the basic physical constant between three types of quarks and the masses of leptons with charges in detail. First, by further theoretical analysis, we wonderfully see that the result got from the mass empirical formula of quark and charged lepton is identical with the data received by theoretical estimating from the gauge field theory. Second, we also gladly see that the result got from quark and lepton （with charges） mass empirical formula is completely accordant with experiment data. These mass formulas reveal the essential relation between me, mμ, mτ and mq. At the same time, the empirical formula may also derive the mass formula of neutrinos. As to the mass of neutrinos, at present we only know the square difference of its mass, and so this is meaningful to theoretically estimating the mass.     

Neutrino mass hierarchy and lepton flavor mixing

In the standard model of particle physics there are three species of neutrinos whose masses were originally assumed to be zero. But the discovery of solar and atmospheric neutrino oscillations indicates that neutrinos are massive and lepton flavors are mixed. In this brief review we first give an overview of our current knowledge about the neutrino mass spectrum and lepton flavor mixing angles, and then comment on the seesaw mechanisms which allow us to understand the origin of tiny neutrino masses. We pay particular attention to the nearly tri-bi-maximal neutrino mixing pattern and the Friedberg-Lee symmetry to derive it. A relatively promising possibility of detecting hot and warm neutrino dark matter in the Universe will also be discussed.     

现时粒子的超对称伴子质量和轻子结构

据两类自由流阻尼标度理论算得的3代粒子质量及宇宙早期核子与现实核子质量的关系式,计算了宇宙暴胀时产生的3代粒子的超对称伴子质量,它们填充了175~1014GeV的质标区.利用研究光子结构的类似方法,分析了轻子的夸克/胶子结构图象,其结果尚待实验证实.