We may earn revenue from the products available on this page and participate in affiliate programs. Learn More › group analysis of a 10-shot group Group size, not mean radius, has been the dominant ...

Using the first new method in half a century for measuring the size of the proton via electron scattering, scientists have produced a new value for the proton's radius in a new experiment. Using the ...

Researchers have made a precise measurement of the size of the proton -- a crucial step towards solving a mystery that has preoccupied scientists around the world for the past decade. The world's ...

For a lesson on just how much—and just how little—we really know about the universe, consider protons. We know these tiny, positively charged particles reside within the nucleus of every atom and ...