January 25, 2013
The Incredible, Baffling, Shrinking Proton
Geoff Brumfiel, Nature News
One of the Universe's most common particles has left physicists completely stumped. The proton, a fundamental constituent of the atomic nucleus, seems to be smaller than thought. And despite three years of careful analysis and reanalysis of numerous experiments, nobody can figure out why.
An experiment published today in Science1 only deepens the mystery, says Ingo Sick, a physicist at the University of Basel in Switzerland.
TAGGED: particle physics, protons, physics