Most recent advances in understanding the electron's mass have been thanks to better and better predictions of the g-factor. (Two decades ago, scientists last published an electron mass ...

The physics of relativity makes fast-moving objects behave as if they had a larger mass, but can never make the mass seem smaller. Condensed matter physics, though, can make electrons seem like ...

Scientists have made the most precise measurement yet of the electron's atomic mass. "It is a major technical improvement," said Edmund Myers, a physicist at Florida State University, who wrote an ...

Like a gear mechanism, quantum mechanics links the mass of the carbon ion firmly to the mass of the electron, which is thereby measurable. Only a theoretical contribution enabled the measurement of ...

The electron atomic mass presented in this Letter, combined with the Rydberg constant 6, the atomic mass of rubidium 27 and an atom interferometric measurement of h/m Rb (ref. 26), yields a value ...

For context, that’s less than one-millionth the mass of an electron, which clocks in at a comparatively gargantuan 511,000 eV. So, yeah—neutrinos are ridiculously lightweight.

Neutrinos, according to the German-based Karlsruhe Tritium Neutrino experiment (KATRIN), have no more than 0.0002% the mass of an electron.

That new number — about half of the previous ceiling on neutrino mass — means that it would take more than 460,000 neutrinos to reach the mass of an electron, “and possibly a lot more ...