Strong CP Problem
Concept
A problem in particle physics concerning why the Theta parameter in the strong nuclear force is experimentally found to be zero or very small, which would otherwise violate CP symmetry.
Mentioned in 2 videos
Videos Mentioning Strong CP Problem
Frank Wilczek: Physics of Quarks, Dark Matter, Complexity, Life & Aliens | Lex Fridman Podcast #187
Lex Fridman
A puzzling aspect of the strong interaction related to the near-but-not-exact symmetry under time reversal, for which axions are proposed as a solution.
What's Going Wrong in Particle Physics? (This is why I lost faith in science.)
Sabine Hossenfelder
A problem in particle physics concerning why the Theta parameter in the strong nuclear force is experimentally found to be zero or very small, which would otherwise violate CP symmetry.