分类： 物理学 >> 基本粒子与场物理学 提交时间： 2023-05-03
摘要：In this paper we followed the idea in Ref. [1] to discuss the Doppler frequency shift of photons and the Compton scattering between photons and electrons, pointing out that followingthe idea we have to modify the usual quantum relation of massless particle. But due to limitedinformation and knowledge, we couldn’t yet determine the specific expression for the correctioncoefficient of the quantum relation of massless particle. However, the phenomenon of spontaneous radiation in a cyclotron maser give us an opportunity to see what the expression for this correctioncoefficient might look like, as the phenomenon of spontaneous radiation in a cyclotron maser canbe explained by the effect of Doppler frequency shift of virtual photons and Compton scatteringbetween virtual photons and electrons. Therefor, under some restrictive conditions, we construct a very concise expression for this correction coefficient by discussing different cases. And then we used this expression to analyze the wavelength of radiation in the cyclotron maser, which tends toa limited value at v→c, rather than to 0 as in the Lorentz model. This paper still inherits the idea inRef. [1] that the energy and momentum of particles cannot be infinite, otherwise it will make some equations meaningless, and this view is also from the idea in some quantum gravity models. This paper also provides us with a possible experimental scheme to determine the value of Qin Ref. [1], but it still requires extremely high experimental energy.
分类： 物理学 >> 基本粒子与场物理学 分类： 物理学 >> 电磁学、光学、声学、传热、经典力学和流体动力学 提交时间： 2023-04-10
摘要：本文回顾了推导达朗贝尔波动方程的全过程，其中最重要的一步是用高斯定律和安培定律，分别导出了标势和矢势的达朗贝尔波动方程。本文强调：高斯定律是库伦定律的微分形式，其中的源电荷与观测者即场点是相对静止的；在安培定律中，源电流载体与观测者即场点也是相对静止的。本文的结论是：麦克斯韦方程组和达朗贝尔波动方程都是在源-观相对静止条件下的方程，达朗贝尔波动方程中的常数‘C’是在真空环境中，源-观相对静止条件下的传播速度。 在这样的特殊条件下，电磁波的传播空间是均匀和各向同性的，因此，无论传播的距离和方位几何，无论源-观所在的实验室位于哪个星球上，绝对运动如何，电磁波传播速度都相同，这是合乎逻辑的。 真空中的电磁波从源电荷、源电流发出，向各处的观测者传播，源-观相对静止，传播空间均匀而各向同性的，这是一个准确的物理图像，是准确理解光速不变原理的物理基础。
分类： 物理学 >> 基本粒子与场物理学 提交时间： 2023-02-08
摘要：We give how to calculate the vacuum stability conditions of scalar potential for two Higgs doublet model with explicit CP conservation. Moreover, the analytical sufficient and necessary conditions are obtained. The argument methods are first used to study the tensor with two parameters.
分类： 数学 >> 数学物理 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2023-02-08
In this paper, we present how to calculate the bounded from below or the vacuum stability of scalar potential for a general CP violating two-Higgs-doublet model by using the concepts of co-positivity and the gauge orbit spaces. Meanwhile, the semi-positive definiteness is prove for a class of 4th-order 2-dimensional complex tensor.
分类： 物理学 >> 地球物理学、天文学和天体物理学 分类： 物理学 >> 基本粒子与场物理学 提交时间： 2022-10-16
分类： 物理学 >> 基本粒子与场物理学 提交时间： 2022-07-28
摘要：Komar积分公式可以方便地用于定义渐近平直时空的质量与角动量。但是，二者的表达式在形式上不一致，彼此之间存在一个差异因子。为了消除这种不一致性，
采用把保持微分形式次不变的微分算子作用于1-形式矢量场来生成守恒流的方法，得到了含Killing矢量非线性三阶导数项的修正Komar势。基于该势的守恒荷定义实现了渐近平直时空的质量与角动量在形式上的一致性。
分类： 物理学 >> 基本粒子与场物理学 提交时间： 2022-06-21
In this article, I shall propose an enlightening view on the origin of dark matter abundance, in which I introduce a neutral primordial field, which is a new field beyond the standard model, the mass of the primordial field is confined in the vicinity of neutrino mass (or 1-2 orders of magnitude different from the neutrino mass). All the standard model elementary particles are produced spontaneously from this field in the Big Bang epoch of the universe and then these produced elementary particles decayed or annihilated in the well-known standard model interactions. The relic of the primordial field appears in a form of vacuum energy can not only give naturally the correct abundance of dark matter in the present universe, but provide a natural solution to the cosmological constant problem as well. We find that the conventional methods of detecting dark matter either fail or have great difficulties to detect the remaining vacuum energy of the primordial field, and how to confirm the existence of the remaining energy of the universe's original energy in experiment is still an open problem.
分类： 物理学 >> 基本粒子与场物理学 提交时间： 2021-10-16
摘要： 提出马赫思想的一种表述，并讨论了压强对时空弯曲的影响，由此得到如下一些结果。第一，有一部分类星体由于其非宇宙学红移而成为伪类星体；第二，对暗物质存在的部分依据如旋涡星系转动曲线、宇宙结构形成等给出非暗物质的理解；第三，预期沿银河系径向高速运动粒子静惯性质量会发生改变、地球绕日轨道和月球绕地轨道会出现微小畸变；第四，计算表明孤立恒星、星系和星系团可能具有广义相对论二十余倍的引力透镜效应；第五， 黑洞奇点有可能避免；第六，给出宇宙一种周期性演化模型。在这种模型中虽然宇宙演化的发散奇点不可能避免，但测地线完备可能保持，并且不需要暗能量当今宇宙仍可能处于加速膨胀阶段。该模型不存在视界疑难和平直性疑难。最后，探讨了引力波源是否可多信道探测的问题。
分类： 物理学 >> 基本粒子与场物理学 提交时间： 2021-02-26
摘要：本文对理想气体与真空的类比研究。在这种类比下，质量来源于流体的漂移质量，而一定的假设下，质能方程及质速关系也能得到，并进一步可导出洛伦兹变换。
分类： 物理学 >> 基本粒子与场物理学 提交时间： 2020-11-02
摘要：In this note, we investigate the anomalies in field theories. The results of the anomalies through Feynman diagrams calculation are multi-valued function. These single-valued branches of multi-valued function are related to the bound states of neutral pseudoscalar mesons. Adding these bound state contributions, we obtain a new anomaly free condition that all the external particles are on-shell and find the non-perturbative mass spectrum of neutral pseudoscalar mesons. We also discuss the anomaly in 2 dimensional QFT.
分类： 物理学 >> 基本粒子与场物理学 提交时间： 2020-09-17
摘要：In this work, we try to find a way to describe the physical law of micro-world under the frame of a space-time theory. By introducing a scalar field D(x), we rewrite the action of conventional field theory and the Lagrangian describing the motion of the particle, where a modified space-time relation is obtained. To prove the correctness of this attempt, we derive the Klein-Gordon equation by the Hamilton-Jacobi method in four dimensional form.
分类： 物理学 >> 基本粒子与场物理学 提交时间： 2020-09-06
摘要： We regard the background of space-time as a physical system composed of discrete volume elements at the Planck scale and get the internal energy of space-time by Debye model. A temperature-dependent minimum energy limit of the particles is proposed from the thermal motion part of the internal energy. As decreases of the temperature caused by the expansion of the universe, more and more particles would be "released" because of the change of the energy limit, we regard these new particles as a source of dark energy. The minimum energy limit also leads to a corrected number of particles in universe and a modified conservation equation. According to the modified conservation equation, an effective cosmological constant consistent with its observed value is obtained.
分类： 物理学 >> 基本粒子与场物理学 分类： 物理学 >> 电磁学、光学、声学、传热、经典力学和流体动力学 提交时间： 2020-03-13
摘要： The interactions between waves and electrons are the basis of vacuum tubes and particle accelerators. In order to further understand the interactions, we proposed a new electromagnetic model. In this model, the photon is composed of two elementary particles – ephoton and mphoton, which are the basic particles that form the electric fields and magnetic fields, respectively. There are many ephotons around the electrons and the electrons can absorb the ephotons. The proposed electromagnetic model can well explain the electromagetic phenomena and the interactions between waves and electrons.
分类： 物理学 >> 基本粒子与场物理学 分类： 数学 >> 数学物理 提交时间： 2018-10-08
摘要： 本文系统地探讨了霍奇星算子与外微分算符作用于任意微分形式场时两者的一般组合规律。首先，找到了保持微分形式场的次不变的两个组合算符，并通过二者的线性组合得到了一个新算符。其次，当由任意数目的霍奇星算子与外微分算符进行组合时，作者导出了所有形式上彼此互异的组合算符的统一表达式，这些表达式由单个霍奇星算子与外微分算符以及二者的任选两个的非零组合构成。在此基础上，分析了所有算符之间的相互作用关系，并根据这些算符对微分形式的次的改变情况，对它们进行了具体分类。最后，作为一个应用，作者详细讨论了如何由次相同的微分形式的线性组合来构造电磁场的麦克斯韦方程。
分类： 物理学 >> 基本粒子与场物理学 提交时间： 2018-06-02
摘要： 利用段一士提出的规范势可分解和具有内部结构的思想，使用几何代数方法对SO（n）群用单位矢量场进行了分解，给出了一般形式，并讨论这个分解的性质；由此给出了SU（2）群和U（1）群用单位矢量分解的形式，这正是著名物理学家法捷耶夫1999年所给出的结果。使用SO（n）群规范势分解的一般形式讨论了Gauss-Bonnet-Chern 密度的局域拓扑结构，其整体拓扑结构正好是Gauss—Bonnet-Chern 定理，由拓扑结构很容易得到Euler- Poincaré 示性数的Morse 理论形式。利用SU（2)群规范势分解研究了-1/2 Bose-Einstein 凝聚体，得到了一个新的环流条件，也是Mernin-Ho 关系的推广。最后，使用段一士发现的三维黎曼几何的Torsion 张量与U（1）规范理论的关系，使用U（1）规范势分解研究了位错线与link 数的关系。
分类： 物理学 >> 基本粒子与场物理学 提交时间： 2017-12-01
摘要： 为了纪念段一士教授逝世一周年，我将我们发表在Helv.Phys.Acta.(1995,68:513)上的一篇`文章放在网上. 使用几何代数,对n 维紧致黎曼流形上球丛的自旋联络的一般分解进行了仔细的研究,利用这种分解理论,Eular-poincare 示性数的Gauss-Bonnet-Chern 密度能够表示为一个光滑矢量场,并取Delta 函数形式.然后对Gauss-Bonnet-Chern 密度的拓扑结构进行了讨论,经一步,通过这种拓扑结构得到了Eular-poincare 示性数Morse 理论的形式
分类： 物理学 >> 基本粒子与场物理学 提交时间： 2017-09-17
摘要：Ithasbeen known thatthe supersym m etric avor changing neutralcurrent problem can beavoided ifthesquarkstakethefollowing m asspattern,nam ely the #12;rsttwo generations with the sam e chirality are degenerate with m asses around the weak scale,while the third generation is very heavy. W e realize thisscenario through the supersym m etricextension ofa topcolorm odelwith gauge m ediated supersym m etry breaking.
分类： 物理学 >> 基本粒子与场物理学 提交时间： 2017-09-17
摘要：The 1/Nc expansion of the heavy baryon Isgur-Wise functions is discussed.Because of the contracted SU(2Nf ) light quark spin-flavor symmetry, the universality relations among the Isgur-Wise functions of b ! #3;c and #6;(∗) b ! #6;(∗)c are valid up to the order of 1/N2 c .
分类： 物理学 >> 基本粒子与场物理学 提交时间： 2017-09-17
摘要：At the order of 1/m3b , the B meson lifetimes are controlled by the hadronic matrix elements of some four-quark operators. The nonfactorizable magnitudes of these four-quark operator matrix elements are analyzed by QCD sum rules in the framework of heavy quark effective theory. The vacuum saturation for color-singlet four-quark operators is justified at hadronic scale, and the nonfactorizable effect is at a few percent level. However for color-octet four-quark operators, the vacuum saturation is violated sizably that the nonfactorizable effect cannot be neglected for the B meson lifetimes. The implication to the extraction of some of theparameters from B decays is discussed. The B meson lifetime ratio is predicted as τ (B−)/τ (B0) = 1.09 ± 0.02. However, the experimentalresult of the lifetime ratio τ (#3;b)/τ (B0) still cannot be explained.
分类： 物理学 >> 基本粒子与场物理学 提交时间： 2017-09-17
摘要：The original results for the baryon-pion couplings in the large Nc QCD can be understood in a simpler way in the Hartree-Fock picture. The large Nc relation and its 1/Nc correction between the heavy baryon- meson coupling and the light baryon-meson coupling are emphasized.Application to the baryon-ρ meson interactions is straightforward. The implications of recent experimental result for the strong coupling con-stants of the heavy baryon chiral lagrangian are discussed.
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