News Particle Physics

Neutrinos’ maximum possible mass shrinks further

The KATRIN experiment nearly halved the maximum possible mass for the subatomic particles

An image of the KATRIN experiment shows a metallic structure made of concentric circles and radial lines

The KATRIN experiment (pictured) measures the energies of electrons produced in radioactive decays of tritium to determine the mass of neutrinos.

Markus Breig/KIT

By Emily Conover

Neutrinos are known to have tiny masses. A new result proclaims the subatomic particles to be even tinier still.

The electrically neutral particles, produced in radioactive decays and in reactions in the sun and elsewhere in the cosmos, have a mass of less than 0.45