Wednesday July 07, 2010
Incredible shrinking proton raises eyebrows
Kate McAlpine
New Scientist
How big is a proton? The most accurate measurement yet suggests it's smaller than we thought. This could be due to an error – or it might just hint at totally new particle physics.
"The new experiment presents a puzzle with no obvious candidate for an explanation," says Peter Mohr of the international Committee on Data for Science and Technology (CODATA), which calculates values for fundamental constants in physics, who was not involved in the new work.
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