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PAllen
#1
Oct7-10, 11:38 PM
Sci Advisor
PF Gold
P: 5,083
In one account of the new findings of smaller proton radius, the claim was repeated several times that the radius of a proton was predicted by QED, in conflict with the new measurement. Why QED? I would think, within a proton, QCD is orders of magnitude more important. Of course the quarks are charged, but why would QED dominate?

Thanks for any explanation.
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