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There are $20$ numbers which are of maximum importance in physics. Well, $20$ is probably not going to do it these days (maybe you were reading something written before the neutrino oscillation discovery of the late $1990$'s). Before the Super Kamiokande experiments in the $1990$'s, we all thought that neutrinos were massless and didn't mix with each other, ...


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Those who write than the Standard Model (SM) is natural interpret it as a fundamental theory, rather than an effective theory or effective field theory, with an unphysical cut-off taken to infinity, $\Lambda\to\infty$. The bare parameters and loop corrections diverge, but are in any case considered unphysical. Only renormalized Lagrangian parameters ...



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