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245 | Solo: The Crisis in Physics
Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
The Nature of Quantum Field Theory
There's other notions of naturalness that we use at a more informal level. And we can talk about like, why should we have some expectation that something is natural? The rough and ready thing that we have in mind when we say that things in the standard model are natural or not is if you have a dimensionless number. If you find such a number for no good reason, like it's the combination of a whole bunch of things that really should add up to something of order unity, but they don't, that's a naturalness problem. That's one of the major problems with quantum field theory.
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