Tenth-Order QED Contribution to the Electron g-2 and an Improved Value of the Fine Structure Constant · HackerPapers discussions

Tenth-Order QED Contribution to the Electron g-2 and an Improved Value of the Fine Structure Constant — mentioned by T-A

Tue, 27 Nov 2018 18:17:30 GMT

> Are you arguing something like, "there are X irreducible inputs to the Standard Model. For any particular input, a, you might be able to swap it out for a different one, g, so that you still have X irreducible inputs, but now they are a different set. That's part of what I'm saying. Some trivial examples from the Standard Model are the choice of angles you use to parametrize the CKM and PMSN matrices, Weinberg angle vs electroweak gauge couplings and the scale at which you choose to fix those couplings. Maybe it will help to call the prediction of values for one such set of parameters from…

Paper and discussion history. A mention is not an endorsement.

Tenth-Order QED Contribution to the Electron g-2 and an Improved Value of the Fine Structure Constant — mentioned by T-A

Wed, 21 Nov 2018 22:35:04 GMT

Given what? If a theory gives you a well-defined relation between the magnetic moment of the electron and the fine structure constant, you can measure either one and then compute the other one. Which one is "predicted" is just a convention. Eq. (13) in [1] is a prediction of the electron's magnetic moment given the fine structure constant. Eq. (15) in [1] is a prediction of the fine structure constant given the electron's magnetic moment. For the purposes of that paper (testing QED) it turns out to be more convenient to use Eq. (15). [1] https://arxiv.org/abs/1205.5368

Paper and discussion history. A mention is not an endorsement.