View Single Post
Oct7-10, 11:38 PM
Sci Advisor
PF Gold
P: 5,027
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.
Phys.Org News Partner Physics news on
New approach to form non-equilibrium structures
Nike krypton laser achieves spot in Guinness World Records
Unleashing the power of quantum dot triplets