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This tag is for questions which relates with the renormalization, an ensemble of techniques which serves to treat the infinities which appear in quantum field theory or statistical mechanics. Renormalization procedures are based on the requirement that certain physical quantities (such as the mass and charge of an electron) equal observed (experimental) values.

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Why is finding a mathematical basis for the fine-structure constant meaningful?

I was reading QED by Richard Feynman and at the end he mentions that: There is a most profound and beautiful question associated with the observed coupling constant, $e$ – the amplitude for a real el …
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