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1. chinaXiv:202009.00053 [pdf]

A study of a scalar field probes micro space-time

Jian-Bo Deng; Miao-Yi Deng; Qi-Qi Fan
Subjects: Physics >> The Physics of Elementary Particles and Fields

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.

submitted time 2020-09-17 Hits1704Downloads223 Comment 0

2. chinaXiv:202008.00076 [pdf]

Note on anomalies in field theories

刘昌勇
Subjects: Physics >> The Physics of Elementary Particles and Fields

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.

submitted time 2020-09-14 Hits1289Downloads308 Comment 0

3. chinaXiv:202009.00011 [pdf]

The cosmological constant from space-time discreteness

Qi-Qi Fan; Cong Li; Hao-Ran Zhang; Peng-Zhang He,; Jian-Bo Deng
Subjects: Physics >> The Physics of Elementary Particles and Fields

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.

submitted time 2020-09-06 Hits2796Downloads223 Comment 0

4. chinaXiv:201802.00685 [pdf]

An Explanation of the Interactions between Waves and Electrons: Discussion of Electromagnetic Fields

Weiye Xu
Subjects: Physics >> The Physics of Elementary Particles and Fields

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.

submitted time 2020-03-13 Hits23472Downloads1988 Comment 0

5. chinaXiv:201810.00001 [pdf]

霍奇星算子与外微分算符的组合规律

彭俊金
Subjects: Physics >> The Physics of Elementary Particles and Fields

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。

submitted time 2018-10-08 Hits21112Downloads1471 Comment 0

6. chinaXiv:201806.00018 [pdf]

规范势分解理论与整体拓扑问题.pdf

李希国
Subjects: Physics >> The Physics of Elementary Particles and Fields

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。

submitted time 2018-06-02 Hits2832Downloads1210 Comment 0

7. chinaXiv:201712.01591 [pdf]

LXG05.pdf

李希国
Subjects: Physics >> The Physics of Elementary Particles and Fields

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

submitted time 2017-12-01 Hits2109Downloads942 Comment 0

8. chinaXiv:201711.00007 [pdf]

Topcolor-A ssisted Supersym m etry

Chun Liu
Subjects: Physics >> The Physics of Elementary Particles and Fields

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.

submitted time 2017-09-17 Hits1542Downloads910 Comment 0

9. chinaXiv:201711.00008 [pdf]

1/Nc Expansion of the Heavy Baryon Isgur-Wise Functions

Chun Liu
Subjects: Physics >> The Physics of Elementary Particles and Fields

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 .

submitted time 2017-09-17 Hits1614Downloads873 Comment 0

10. chinaXiv:201711.00009 [pdf]

Four-quark Operators Relevant to B Meson Lifetimes from QCD Sum Rules

M.S. Baek, Jungil Lee,Chun Liu , H.S. Song
Subjects: Physics >> The Physics of Elementary Particles and Fields

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.

submitted time 2017-09-17 Hits1574Downloads816 Comment 0

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