[ExI] proton measurement upset

John Clark jonkc at bellsouth.net
Fri Jul 9 04:39:52 UTC 2010

On Jul 8, 2010, at 3:04 PM, Gregory Jones wrote:

> A touch smaller?  4% is huuuge. Did they mean 4 parts per billion? 

The old figure for the radius of a proton was 0.8768 femtometers, the new figure is 0.8418 femtometers. That's about 4%. Maybe they're wrong but it's not junk science, it was in Nature and that's about as good as it gets.

 John K Clark 
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