An attosecond—or 0.000000000000000001 second—is no time at all for a person. That is not so for electrons, atoms and ...

More information: Measurement of the Z-boson mass, arXiv (2025). DOI: 10.48550/arxiv.2505.15582 Journal information: Physical Review Letters , arXiv ...

Properties of “Lite” Intermediate-mass Black Hole Candidates in LIGO-Virgo’s Third Observing Run. The Astrophysical Journal Letters, 2025; 985 (2): L37 DOI: 10.3847/2041-8213/adc5f8 ...

The KATRIN experiment began operations in 2019. It seeks to constrain the neutrino’s mass by looking at the energy spectrum of electrons and electron antineutrinos emitted by decaying tritium, a ...

With the current data from the KATRIN experiment, an upper limit of 0.45 electron volt/c 2 (corresponding to 8 x 10 -37 kilograms) could be derived for the neutrino mass.

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.

The KATRIN experiment in Germany nearly halved the maximum possible mass for neutrinos, setting it at 0.45 electron volts.

Each electron carries one unit of negative charge (1.602 x 10-19 coulomb) and has a mass of just about 1/1836th of a proton. Electrons are found both not permanently attached to atoms and within ...

Discover the history, structure, and importance of the periodic table of elements, from Mendeleev’s discovery to modern scientific applications.