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- W4285421256 abstract "We report the 2018 self-consistent values of constants and conversion factors of physics and chemistry recommended by the Committee on Data of the International Science Council. The recommended values can also be found at physics.nist.gov/constants. The values are based on a least-squares adjustment that takes into account all theoretical and experimental data available through 31 December 2018. A discussion of the major improvements as well as inconsistencies within the data is given. The former include a decrease in the uncertainty of the dimensionless fine-structure constant and a nearly two orders of magnitude improvement of particle masses expressed in units of kg due to the transition to the revised International System of Units (SI) with an exact value for the Planck constant. Further, because the elementary charge, Boltzmann constant, and Avogadro constant also have exact values in the revised SI, many other constants are either exact or have significantly reduced uncertainties. Inconsistencies remain for the gravitational constant and the muon magnetic-moment anomaly. The proton charge radius puzzle has been partially resolved by improved measurements of hydrogen energy levels." @default.
- W4285421256 created "2022-07-15" @default.
- W4285421256 creator A5006474578 @default.
- W4285421256 creator A5015511535 @default.
- W4285421256 creator A5050108344 @default.
- W4285421256 creator A5071826867 @default.
- W4285421256 date "2021-06-30" @default.
- W4285421256 modified "2023-10-16" @default.
- W4285421256 title "CODATA recommended values of the fundamental physical constants: 2018" @default.
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