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.

1. 1The same formula, applied to a heavier lepton 6–25 min
2. 2Your amplitude grows and it should not 6–25 min
3. 3Counting everything that runs 8–25 min
4. 4What the spectrum has to contain 6–25 min
5. 5Turning off a graviton mass 10–35 min
6. 6How much symmetry a theory is allowed to have 15–45 min
7. 7How many orders are worth computing 25–1 hr
8. 8Checking a collaborator's series 14–35 min
9. 9Where an approximation starts being good 20–50 min
10. 10Setting the small mass to zero 20–55 min
11. 11Where a coupling stops being small 20–50 min
12. 12Where a circle stops getting smaller 20–50 min