神奇的自然常量h

在物理学基本常量中，普朗克常量h是一个奇特而又神奇的常量，本对普朗克常量h在现代物理学中的特殊地位及其所发挥的重要作用做了分析、论述。     

Axion-Like Particles and the Higgs Decays h→PZ and h→Pe~+e~-

Axion-like particles(ALPs)are often defined as relatively light pseudoscalar particles and appear in many extensions of the Standard Model.Taking into account constraints on the free parameters from existing searches and explaining the g-2 deviation,we consider the contributions of ALPs with mass in the range of 1.5GeVm_am_h-m_Z to the exclusive Higgs decays h→PZ and h→Pe~+e~-with P being the pseudoscalar mesonsπ~0,η,η',η_c andη_b in a model-independent approach.We find that,in most of the parameter space range,the contributions of ALP to these decay-processes are ver.y small,while in the case of the ALP mass ma approximatel.y equaling the meson mass m_P,the contributions are significantly large.     

对普朗克常数h的思考

 1900年普朗克(Planck)为解释黑体幅射的能量-波长实验曲线,提出辐射能量的不连续性概念,即任何能量都是某最小能量的整数倍,而此最小能量中的比例系数便是普朗克常数h,h=6·63×10^-34焦耳·秒(J·s)。物理学为简化公式常用h-=h/2π,h-称为约化普朗克常数。h是微观现象量子特性的表征。h的提出是对传统物理的划时代挑战,开创了量子力学的新纪元。常数h的推导19世纪末,在物理学上空飘起的一朵乌云是黑体(只能吸收而不能反射或透射电磁幅射的物体)辐射能量按波长的分布曲线在整个波段理论计算和实验结果总是不一致。其中维恩导出的公式适合短波部分而瑞利-金斯导出的公式适合长波部分.     

Is the Devil in h?

This note is a part of my effort to rid quantum mechanics (QM) nonlocality. Quantum nonlocality is a two faced Janus: one face is a genuine quantum mechanical nonlocality (defined by the Lüders’ projection postulate). Another face is the nonlocality of the hidden variables model that was invented by Bell. This paper is devoted the deconstruction of the latter. The main casualty of Bell’s model is that it straightforwardly contradicts Heisenberg’s uncertainty and Bohr’s complementarity principles generally. Thus, we do not criticize the derivation or interpretation of the Bell inequality (as was done by numerous authors). Our critique is directed against the model as such. The original Einstein-Podolsky-Rosen (EPR) argument assumed the Heisenberg’s principle without questioning its validity. Hence, the arguments of EPR and Bell differ crucially, and it is necessary to establish the physical ground of the aforementioned principles. This is the quantum postulate: the existence of an indivisible quantum of action given by the Planck constant. Bell’s approach with hidden variables implicitly implies rejection of the quantum postulate, since the latter is the basis of the reference principles.     

普朗克常量h的物理学意义

普朗克常量h是能量量子化概念的基石, 更是理解量子力学诸多内容的关键, 本文从4个方面介绍了普 朗克常量的意义和应用, 包括其在量子力学两种形式中的基础作用、 对量子化概念发展的帮助、 改变对物质世界连 续性认识的启发以及质量新标准建立中的作用     

经典q变形谐振子及其h量子化

通常所谓的量子包络代数可以在经典Poisson括号的意义下实现,以谐振子系统为例,给出U_q(SU(2))的这种经典实现,指出这种q变形伴随着相空间复坐标的Beltrami变形。并讨论了这种经典q变形谐振子系统的量子化,得到在Lie括号意义下的U_q(SU(2))代数。     

Supersymmetric Box Contributions toe + e −→Z 0 h 0 ande + e −→A 0 h 0

Within the MSSM we calculate the electroweak 1-loop box contributions to the processese ⁺ e ^–Z ⁰ h ⁰ ande ⁺ e ^–Z ⁰ h ⁰. We present detailed results for c.m. energies and as well as for tan =2 and tan =50. The box contributions to the processe ⁺ e ^–Z ⁰ h ⁰ are, depending on and tan , of the order –2 to –20% and toe ⁺ e ^– A ⁰ h ⁰ of 2 to 10%.     

Evidence for heavy hyperhydrogen (Λ)(6)h

Evidence for the neutron-rich hypernucleus (Λ)(6)H is presented from the FINUDA experiment at DAΦNE, Frascati, studying (π+,π-) pairs in coincidence from the K(stop)(-) + (6)Li →(Λ)(6)H + π+ production reaction followed by (Λ)(6)H → (6)He + π- weak decay. The production rate of (Λ)(6) undergoing this two-body π- decay is determined to be (2.9 ± 2.0) × 10(-6)/K(stop)(-). Its binding energy, evaluated jointly from production and decay, is BΛ((Λ)(6)H) = (4.0 ± 1.1) MeV with respect to (5)H+Λ. A systematic difference of (0.98 ± 0.74) MeV between BΛ values derived separately from decay and from production is tentatively assigned to the (Λ)(6)H 0(g.s.)(+) → 1+ excitation.     

D46h结构空间群C-G系数的计算

在晶体拉曼散射张量的计算中,晶体空间群的Ｃ－Ｇ系数具有重要作用。本文利用本征函数法,计算了六角密排结构Ｄ６ｈ＾４空间各的Ｃ－Ｇ系数,同时给出波矢选择规则和Ｃ－Ｇ序列。     

O8h结构磁空间群C-G系数的计算

磁空间群相对于以往的空间群,在对物理图像的描述上更准确、更深刻。如它可在考虑晶体对称性的同时,也考虑到自旋磁矩的作用,因而它的C－G系数更加重要。本文利用本征函数法,计算了面心立方结构Oh^8磁空间群的C－G系数,以及波矢选择规则和C－G序列。     

24 h continuous observation of sodium layer over Wuhan by lidar

Based on the dual-wavelength lidar we have developed, the 24 h continuous ob- servation has been realized in its sodium channel by using Faraday atomic filter technology and other relevant technologies. This will facilitate the continuous ob- servation of the sodium layer and the relevant upper atmosphere over Wuhan. A result of about 50 h observation indicates that the daytime column density of so- dium layer over Wuhan is slightly increased compared to that during the nighttime, and the characteristics of the sporadic sodium layer occurring during the daytime are compared with that during the nighttime.     

使用F l a s h动画演示物体运动过程

以弹簧振子动画的制作为例介绍了利用F l a s h函数s e t I n t e r v a l制作物体二维平动动画的方法, 具有较 强的通用性. 并介绍了利用l i n e T o和o n E n t e r F r ame函数绘制函数曲线的方法, 同时提出了对函数曲线进行伸缩的 方法, 以及按钮防误按设计     

量子力学的经典近似可以表示为h→0吗

本指出，当仪器的线度ｄ远大于德布罗意波长λ时，量子力学将回到经典力学。而当ｄ〈〈λ时，量子力学将回到经典波动理论。     

Precise evaluation of h→c■ and axion-like particle production

We study the decay of the SM Higgs boson to a massive charm quark pair at the next-to-next-to-leading order QCD and next-to-leading order electroweak.At the second order of QCD coupling,we consider the exact calculation of flavour-singlet contributions where the Higgs boson couples to the internal top and bottom quark.Helpful information on the running mass effects related to Yukawa coupling may be obtained by analyzing this process.High precision production for h→cc within the SM makes it possible to search for new physics that may induce relatively large interactions related to the charm quark.As an example,we evaluate the axion-like particle associate production with a charm quark pair in the Higgs decay and obtain some constraints for the corresponding parameters under some assumptions.     

可积系统棗求迹公式和h逆谱分析

研究了二维无关联四次振子系统,有理环面上积分Hamiltonian运动方程给出了系统一系列周期轨道和经典物理量,使用半经典近似下的Berry-Tabor求迹公式,得到了半经典的态密度．应用Fourier变换分析了每条周期轨道对态密度的贡献,并与量子态密度的Fourier变换结果比较证实了半经典求迹公式的有效性．