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A brief description of the main methods for determining the fine structure constant is given. It is shown that the exact value of the fine structure constant is important for the new International System of Units (SI) and for fundamental…

高能物理 - 唯象学 · 物理学 2025-06-24 K. A. Bronnikov , V. D. Ivashchuk , V. V. Khruschov

Determination of the fine structure constant alpha and search for its possible variation are considered. We focus on a role of the fine structure constant in modern physics and discuss precision tests of quantum electrodynamics. Different…

原子物理 · 物理学 2015-06-26 Savely G. Karshenboim

In the present report the author presents a simple and systematically defined formula for the fine structure constant based only on the number $\pi$. The difference between the suggested value and the currently known experimental one is…

综合物理 · 物理学 2007-05-23 Anastass Anastasov

We comment on past and more recent efforts to derive a formula yielding the fine structure constant in terms of integers and transcendent numbers. We analyse these "exoteric" attitudes and describe the myths regarding {\alpha}, which seems…

综合物理 · 物理学 2010-09-10 Giuseppe Dattoli

Following the successful prediction of an exact value for the fine structure constant later confirmed to differ numerically from the centre value of the latest experimental recommended CODATA range by 10^{-12}, further analysis and…

量子物理 · 物理学 2007-05-23 J. G. Gilson

A numerical coincidence relating the values of the cosmological, gravitational and electromagnetic fine structure constants is presented and discussed in relation to the apparent anthropic fine-tuning of these three fundamental constants of…

广义相对论与量子宇宙学 · 物理学 2015-10-26 Laurence Eaves

A theory of special inconstancy, in which some fundamental physical constants such as the fine-structure and gravitational constants may vary, is proposed in pregeometry. In the special theory of inconstancy, the \alpha-G relation of…

综合物理 · 物理学 2015-04-21 Hidezumi Terazawa

A new approach to the phenomenon of large numbers coincidence leads to unexpected results. No matter how strange it might sound, the exact value of cosmological parameters and their analytical expression through fundamental constants have…

广义相对论与量子宇宙学 · 物理学 2007-05-23 V. E. Shemi-Zadeh

The CODATA recommended values of the fundamental constants are widely applied in particle, nuclear and atomic physics. They are a result of a complicated evaluation (adjustment) of numerous correlated data of different nature. Their…

原子物理 · 物理学 2009-01-09 Savely G. Karshenboim

This report gives the 2014 self-consistent set of values of the constants and conversion factors of physics and chemistry recommended by the Committee on Data for Science and Technology (CODATA). These values are based on a least-squares…

原子物理 · 物理学 2016-10-12 Peter J. Mohr , David B. Newell , Barry N. Taylor

The fine-structure constant {\alpha}, the dimensionless number that represents the strength of electromagnetic coupling in the limit of sufficiently low energy interactions, is the crucial fundamental physical parameter that governs a…

综合物理 · 物理学 2012-02-14 Charles Kirkham Rhodes

Discussion of the constancy, or otherwise, of the various so-called universal constants which abound in physics has continued for many years. However, relatively recent observations, which appear to indicate a variation in the value of the…

综合物理 · 物理学 2007-08-21 A. D. Law , J. Dunning-Davies

This article describes the various experimental bounds on the variation of the fundamental constants of nature. After a discussion on the role of fundamental constants, of their definition and link with metrology, the various constraints on…

高能物理 - 唯象学 · 物理学 2008-11-26 Jean-Philippe Uzan

This paper gives the 2010 self-consistent set of values of the basic constants and conversion factors of physics and chemistry recommended by the Committee on Data for Science and Technology (CODATA) for international use. The 2010…

原子物理 · 物理学 2015-06-04 Peter J. Mohr , Barry N. Taylor , David B. Newell

The fine-structure constant alpha approximately 1/137 is traditionally regarded as a fundamental dimensionless parameter. I argue instead that alpha is a scaled quantity that arises only where the structural scales contributed by classical…

物理学史与哲学 · 物理学 2025-12-09 Harry Sticker

An exact expression is derived for the kinetic contribution to the odd (arbitrary order) frequency moments of the dynamic structure factor via a finite summation that features averages of even (all lower orders) powers of the momentum over…

量子气体 · 物理学 2025-08-26 Panagiotis Tolias , Tobias Dornheim , Jan Vorberger

A continuous approximation for the results of [1] is obtained. In this approximation the energy distribution is represented in the form of the product of the Gibbs factor and superstatistics factor. The mutual weights of the factors are…

化学物理 · 物理学 2007-05-23 V. V. Ryazanov

We discuss experiments and observations aimed at testing the possible space-time variability of fundamental physical constants, predicted by the modern theory. Specifically, we consider two of the dimensionless physical parameters which are…

原子物理 · 物理学 2007-05-23 D. A. Varshalovich , A. Y. Potekhin , A. V. Ivanchik

We derive formulae for the time variation of the gravitational ``constant'' and of the fine structure ``constant'' in various models with extra dimensions and analyze their consistency with the observational data.

广义相对论与量子宇宙学 · 物理学 2007-05-23 E. Garcia-Berro , Yu. A. Kubyshin , P. Loren-Aguilar

A method offering an order of magnitude sensitivity gain is described for using quasar spectra to investigate possible time or space variation in the fine structure constant, alpha. Applying the technique to a sample of 30 absorption…

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