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CODATA recommended values of the fundamental physical constants: 2018
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 …
chemistry recommended by the Committee on Data of the International Science Council …
Search for new physics with atoms and molecules
This article reviews recent developments in tests of fundamental physics using atoms and
molecules, including the subjects of parity violation, searches for permanent electric dipole …
molecules, including the subjects of parity violation, searches for permanent electric dipole …
Highly charged ions: Optical clocks and applications in fundamental physics
Recent developments in frequency metrology and optical clocks have been based on
electronic transitions in atoms and singly charged ions as references. The control over all …
electronic transitions in atoms and singly charged ions as references. The control over all …
The Rydberg constant and proton size from atomic hydrogen
At the core of the “proton radius puzzle” is a four–standard deviation discrepancy between
the proton root-mean-square charge radii (rp) determined from the regular hydrogen (H) and …
the proton root-mean-square charge radii (rp) determined from the regular hydrogen (H) and …
Measurement of the bound-electron g-factor difference in coupled ions
Quantum electrodynamics (QED) is one of the most fundamental theories of physics and has
been shown to be in excellent agreement with experimental results,,,–. In particular …
been shown to be in excellent agreement with experimental results,,,–. In particular …
Proton-electron mass ratio from laser spectroscopy of HD+ at the part-per-trillion level
Recent mass measurements of light atomic nuclei in Penning traps have indicated possible
inconsistencies in closely related physical constants such as the proton-electron and …
inconsistencies in closely related physical constants such as the proton-electron and …
Revisiting the mechanical properties of the nucleon
We discuss in detail the distributions of energy, radial pressure and tangential pressure
inside the nucleon. In particular, this discussion is carried on in both the instant form and the …
inside the nucleon. In particular, this discussion is carried on in both the instant form and the …
Data and analysis for the CODATA 2017 special fundamental constants adjustment
The special least-squares adjustment of the values of the fundamental constants, carried out
by the Committee on Data for Science and Technology (CODATA) in the summer of 2017, is …
by the Committee on Data for Science and Technology (CODATA) in the summer of 2017, is …
Experimental progress in positronium laser physics
The field of experimental positronium physics has advanced significantly in the last few
decades, with new areas of research driven by the development of techniques for trap** …
decades, with new areas of research driven by the development of techniques for trap** …
Observation of the 1S–2S transition in trapped antihydrogen
The spectrum of the hydrogen atom has played a central part in fundamental physics over
the past 200 years. Historical examples of its importance include the wavelength …
the past 200 years. Historical examples of its importance include the wavelength …