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 …

Particle physics today faces the challenge of explaining the mystery of dark matter, the origin
of matter over anti-matter in the Universe, the origin of the neutrino masses, the apparent …

We have performed two-photon ultraviolet direct frequency comb spectroscopy on the 1S-3S
transition in atomic hydrogen to illuminate the so-called proton radius puzzle and to …

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 …

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 …

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 …

Collinear laser spectroscopy is performed on the nickel isotopes Ni 58-68, 70, using a time-
resolved photon counting system. From the measured isotope shifts, nuclear charge radii R …

Helium-3 has nowadays become one of the most important candidates for studies in
fundamental physics,–, nuclear and atomic structure,, magnetometry and metrology, as well …

The masses of the lightest atomic nuclei and the electron mass are interlinked, and their
values affect observables in atomic, molecular,–and neutrino physics, as well as metrology …

Precise knowledge of the fundamental properties of the proton is essential for our
understanding of atomic structure as well as for precise tests of fundamental symmetries. We …