High-energy theory

Most of these problems take Fermi's theory of beta decay apart. It stops working at an energy you can calculate, and that is how the W boson was anticipated decades before anyone saw one. The rest ask what a theory is allowed to contain.

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Counting everything that runs How many orders are worth computing Checking a collaborator's series Setting the small mass to zero Where a coupling stops being small

solve firstrelated, neither firstAn arrow points from the thing you need to the thing that needs it.

Not connected to anything yet (7) — these need a prerequisites or related line. Some may be joined to a concept — try showing concepts.

The same formula, applied to a heavier lepton Your amplitude grows and it should not What the spectrum has to contain Turning off a graviton mass How much symmetry a theory is allowed to have Where an approximation starts being good Where a circle stops getting smaller