“Standard model gets right answer for proton, neutron masses”
What a terrible headline. That’s like writing about the satellite confirmation of time drag as “General relativity gets right answer for clock speed.”
Yes, the masses were what were measured, but that’s not exactly the feature of the experiment....
What do you mean? ... that this was a "retroactive prediction"? This is what I suppose you mean, but I don't see what's wrong with the headline on this basis.