particle physicsWe discuss the fundamental constants of physics within the Standard Model of particle physics. In this model there are 28 fundamental constants, e.g. the constant of gravity or the fine structure constant. First we discuss these fundamental constants. Later we consider possible ...
An attempt is done to calculate the value of the elementary electron charge from its relation to the Planck constant and the speed of light. This relation is obtained, in the first step, from the Pauli analysis of the strength of the electric field associated with an elementary emission ...
A natural system of fundamental physical units c, \hbar, and mis discussed, where ñ is the velocity of light, \hbar is Planck's constant, and mis the Planck mass, which is related to the Newtonian gravitational constant by the equation m= \hbarc/G. In a natural system of units, su...
{\ is\ fine\ structure\ constant.}&\\\ &\left\{ \left( 1-z^{2} \right)\frac{\partial^{2}}{\partial z^{2}}-2z\frac{\partial}{\partial z}+\left[ l\left( l+1 \right)-\frac{m^{2}}{1-z^{2}} \right] \right\}\Theta=0&\mathrm{\left( Angular\ part \right)}\\ ...
- 《Physics》 被引量: 41发表: 2009年 Astrophysical constraints on hypothetical variability of fundamental constants Applied to three inhomogeneous samples of quasar absorption-line spectra, the many-multiplet method gives a shift in the value of the fine-structure constant of Δα/α = (–5.4±...
speed of light in vacuum c, c 0 299 792 458 m s −1 (exact) n.u. of action: reduced Planck constant (h/2π) ¯h 1.054 571 596(82) ×10 −34 J s 7.8 ×10 −8 in eV s 6.582 118 89(26) ×10 −16 eV s 3.9 ×10 ...
Fine Structure constant α,one of the basic constants in physics,plays a very important role in the fields of Atomic Physics, Spectroscopy as well as in Quantum Electro-dynamics and being widely used in these aspect therefore. 精细结构常数α是基本物理常数之一,在原子物理学光谱学和量子电动力学中...
VV Khruschov - 《Physics》 被引量: 2发表: 2011年 Fundamental physical constants: Input data and recommended values by CODATA 2002 The CODATA recommended values of the fundamental physical constants are the most accurate and most reliable constant values applied in different branches o... SG Karsh...
I argue that the laws of physics should be independent of one's choice of units or measuring apparatus. This is the case if they are framed in terms of dimensionless numbers such as the fine structure constant, alpha. For example, the Standard Model of particle physics has 19 such ...
remains these equations without changes, when Ω is constant, or dependence of Ω on time or space coordinates could be neglected. In the same way we may learn how we could vary other fundamental constants or quantities of physics.