Beta function (physics): Difference between revisions

Revision as of 11:09, 25 November 2020

Revision as of 08:57, 16 February 2021

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The one-loop beta function in [[quantum electrodynamics]] (QED) is

*<math>\beta(e)=\frac{e^34}{12\pi^2}~,</math>

or, equivalently,

*<math>\beta(\alpha)=\frac{2\alpha^2}{3\pi}~,</math>