I did not understand one thing: imagine we have calculated a cross section relates to a process, for example compton scattering. The parameters (charge, mass, ...) that come into play in cross section are "bare parameters"? Then after the renormalization of the theory, getting the "bare parameters" in terms of "physical parameters", we must re-express the cross section calculated in terms of "physical parameters"?(adsbygoogle = window.adsbygoogle || []).push({});

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# Stupid question on the qed renormalization

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