On 1/10/2019 4:21 PM, John Clark wrote:
/So even Feynman knew that there was no theoretical value for the
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.
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