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Radius of proton due to QED??
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.
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.