On Sat, Jan 12, 2019 at 11:14 AM Lawrence Crowell < goldenfieldquaterni...@gmail.com> wrote:
> On Friday, January 11, 2019 at 4:51:24 PM UTC-6, Bruce wrote: >> >> On Sat, Jan 12, 2019 at 9:29 AM Lawrence Crowell < >> goldenfield...@gmail.com> wrote: >> >>> On Thursday, January 10, 2019 at 7:18:21 PM UTC-6, Brent wrote: >>>> >>>> On 1/10/2019 4:21 PM, John Clark wrote: >>>> >>>> *So even Feynman knew that there was no theoretical value for the FSC, >>>>> alpha.* >>>>> >>>> >>>> No, he knew very well there was a theory that could come up with a >>>> value because his own Feynman Diagrams could do it. But what he didn't know >>>> and what nobody knows is why his theory came up with that particular pure >>>> number when he never specifically stuck that number into the rules on how >>>> the diagrams should operate. >>>> >>>> >>>> The fine structure constant is e^2/hbar*c. Those three values are >>>> measured independent of any Feynman diagrams of quantum field theory. The >>>> calculation using Feynman diagrams is of the anamolous magnetic moment. A >>>> correction to the value of g that depend on relativistic effects (hence the >>>> occurence of c in the denominator). The anamolous magnetic moment can be >>>> measure experimentally and using Feynman's diagrams and the measured values >>>> of e, hbar, and c a value can be calculated that includes the relativistic >>>> effects of quantum field theory. That's why the agreement with measurement >>>> is significant. >>>> >>>> Brent >>>> >>> >>> Everyone seems to be overlooking charge renormalization. >>> >> >> Do you really think that that is relevant? How? >> >> Bruce >> > > The physical charge is a bare mass corrected by a correction term e = e' + > δe. Charge adjusts with energy in a renormalization group flow of > adjustable parameters. At EW unification energy the fine structure constant > is around 1/128. As E → 0 the RG flow reaches an attractor point that is > the α = e^2/4πεħc. This is computed for the renormalized physical charge e > from all radiative corrections possible. > I think everyone else is aware that the fine structure constant we are talking about is the zero energy limit of the running coupling constant. The infinite renormalisation terms are subtracted from the bare charge to give the experimental result. Only the zero energy measured value has physical significance at low energies. Bruce -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
