Proton's radius revised downward
Surprise measurement may point to new physics
By Andrew Grant, 14:41 PM January 24, 2013
Only in physics can a few quintillionths of a meter be cause for uneasy excitement. A new measurement finds that the proton is about 4 percent smaller than previous experiments suggest. The study, published in the Jan. 25 issue of Science, has physicists cautiously optimistic that the discrepancy between experiments will lead to the discovery of new particles or forces.
“Poking at small effects you can’t explain can be a way of unraveling a much bigger piece of physics,” says Carl Carlson, ...
Source URL: https://www.sciencenews.org/article/protons-radius-revised-downward?mode=magazine&context=4546