This is intended to be kind of a sequel to one of my previous posts, which attempted to convey the vibes surrounding renormalization: the systematic ignorance of physics at small scales.
If you read the thing, you may recall that I justified renormalization with the argument that physics at different scales mostly don’t effect each other. Galileo’s pendulum wasn’t effected by quantum mechanics or the gravitational pull of Jupiter.
There is an outstanding problem in particle physics at the moment that, if not resolved, may send that whole philosophy down the toilet. The problem has been around for a while, but it has got a lot worse in the last two or three years, sending particle physics into a bit of a crisis.