Cracking a 15 year physics mystery, researchers measured the precise size of a proton. In A Nutshell A team in Germany used an unprecedentedly precise laser measurement of hydrogen to pin down the ...
An international team of scientists confirms a surprisingly small proton radius with laser spectroscopy of exotic hydrogen. An international team of scientists confirms a surprisingly small proton ...
Big problems sometimes come in small packages. The problem with which physicists must now concern themselves measures a mere 0.0350 millionth of a millionth of a millimetre. This is precisely the ...
L. Maisenbacher et al, Sub-part-per-trillion test of the Standard Model with atomic hydrogen, Nature, February 11, 2026, DOI: 10.1038/s41586-026-10124-3, https://doi.org/10.1038/s41586-026-10124-3 ...
The PRad physics experiment studies how electrons scatter off of protons A scientific tug-of-war is underway over the size of the proton. Scientists can’t agree on how big the subatomic particle is, ...