Fundamental Constants
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Astrophysics Clocks and Fundamental Constants
Author | : Savely G. Karshenboim,Ekkehard Peik |
Publsiher | : Springer Science & Business Media |
Total Pages | : 374 |
Release | : 2004-08-11 |
Genre | : Science |
ISBN | : 3540219676 |
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The question of a possible temporal variation of the fundamental constants was raised by Paul Dirac in his "large number hypothesis" in 1937. Today it appears in the context of the search for a unified theory of the fundamental interactions. It touches both fundamental and applied physics, as the postulate of the unalterability of the constants is the foundation for modern metrology. The book presents reviews written by leading experts in the field. Focussing on the question of variations of the fundamental "constants" in time or space, the chapters cover the theoretical framework in which variations are expected and the search for variations of quantities like the fine-structure constant, the electron/proton mass ratio, g-factors of proton and neutron etc. in astrophysical and geophysical observations and in precision experiments with atomic clocks and frequency standards.
Fundamental Constants
Author | : Boris M. Menin |
Publsiher | : Cambridge Scholars Publishing |
Total Pages | : 123 |
Release | : 2019-02-27 |
Genre | : Mathematics |
ISBN | : 9781527530379 |
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The book is devoted to one of the important areas of theoretical and experimental physics—the calculation of the accuracy of measurements of fundamental physical constants. To achieve this goal, numerous methods and criteria have been proposed. However, all of them are focused on identifying a posteriori uncertainty caused by the idealization of the model and its subsequent computerization in comparison with the physical system. This book focuses on formulating an a priori interaction between the level of a detailed description of a material object (the number of registered quantities) and the lowest uncertainty in measuring a physical constant. It contains the materials necessary for the optimal design of models describing a physical phenomenon. It will appeal to scientists and engineers, as well as university students.
Recent Advances in Metrology and Fundamental Constants
Author | : Terry J. Quinn,T. J. Quinn,Sigfrido Leschiutta,P. Tavella,Società italiana di fisica |
Publsiher | : IOS Press |
Total Pages | : 886 |
Release | : 2001 |
Genre | : Science |
ISBN | : 1586031678 |
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Over the last decade of the 20th century, many improvements took place in the field of metrology and fundamental constants. These developments and improvements are discussed in this book. The old caesium SI second definition has found a new realization with the fountain approach, replacing the classical thermal atomic beam. The use of cold atom techniques, slowed down and cooled, has opened a number of unexpected avenues for metrology and fundamental constants, one of these possibilities being the atom interferometry. Another development was the demonstration of the possiblility of performing a direct frequency division in the visible, using short femtosecond pulses. Many other developments are also discussed.
Precision Measurement and Fundamental Constants Proceedings
Author | : Barry N. Taylor,D. N. Langenberg |
Publsiher | : Unknown |
Total Pages | : 550 |
Release | : 1971 |
Genre | : Physical measurements |
ISBN | : UIUC:30112007362830 |
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Metrology and Fundamental Constants
Author | : Theo W. Hänsch |
Publsiher | : IOS Press |
Total Pages | : 683 |
Release | : 2007 |
Genre | : Computers |
ISBN | : 9781586037840 |
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One of the exciting characteristics of metrology is its intimate relationship between fundamental physics and the leading edge of technology which is needed to perform advanced and challenging experiments and measurements. This title includes a set of lectures which present the relevant progress in Metrology.
A new standard model of cosmology Time varying fundamental constants and the evolution of the universe
Author | : F. Bakalian |
Publsiher | : The VLS Research Foundation |
Total Pages | : 200 |
Release | : 2024-01-01 |
Genre | : Science |
ISBN | : 9182736450XXX |
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A new theoretical framework is presented to explain the evolution of the universe based on the time-varying properties of the fundamental constants. A static universe with time-varying constants can explain the origin of the cosmic microwave background radiation, CMB anisotropies, the CMB cold spot, the observed redshift-distance modulus data, the origin and composition of dark matter in the universe, galaxy cluster mass estimates, Milky Way galaxy luminosity estimates, population II stellar properties, vacuum-photon interactions, energy cycling between matter, radiation and vacuum field components, time-varying Higgs mechanism and particle mass, and the observed matter-antimatter dichotomy. This is a complete theoretical framework that explains the observable universe and resolves many of the issues with modern-day cosmology.
The 1973 Least squares Adjustment of the Fundamental Constants
Author | : E. Richard Cohen |
Publsiher | : Unknown |
Total Pages | : 78 |
Release | : 1973 |
Genre | : Least squares |
ISBN | : PSU:000029951949 |
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Atomic Masses and Fundamental Constants 4
Author | : J. Sanders |
Publsiher | : Springer Science & Business Media |
Total Pages | : 579 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 9781468478761 |
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The Conference on Nuclear Masses and their Determination which was held at the Max Planck I nstitute in Mainz from 10 to 12 July 1956 resulted in the formation by the International Union of Pure and Applied Physics of a Commission on Atomic Masses and Related Constants. Under the auspices of this Commission conferences covering these subjects were held in Hamilton, Ontario (12-16 September, 1960), in Vienna (15-19 July 1963) and in Winnipeg (28 August-1 September 1967). After the last of these conferences the Commission felt that the position regarding nuclear masses was reasonably good and that as a consequence the fundamental constants should get more emphasis in future conferences. For this reason they were very pleased to accept an offer from the National Physical Laboratory to accept the main burden of organizing the Fourth International Conference on Atomic Masses and Fundamental Constants. An Organizing Committee was appointed with the members: J. H. Sanders, Chairman B. W. Petley, Secretary A. Horsfield, Treasurer P. Dean A. H. Wapstra. They were assisted by a Program Committee consisting of: A. H. Wapstra, Chairman E. R. Cohen A. Horsfield W. H. Johnson, Jr. J. H. Sanders J. Terrien.