theory

The Muon g-2 experiment will measure of the strength of the magnetic field of a subatomic particle called a muon. If the measurement doesn’t overlap with the predicted value, it could point to the scientific community’s next big breakthrough, and we may have to rewrite the textbooks.

How accurate are the predictions of quantum electrodynamics? QED predicted the value of the electron’s magnetic moment to one part in a trillion. Anytime you get that level of agreement, you know you did something right.

From PBS Digital Studios’ The Good Stuff: Dark matter makes up 70 percent of the known universe, and we know very little about it. This video on dark matter includes an interview with theorist Patrick Fox and a tour of the MINOS underground area at Fermilab.

Theoretical particle physics employs very difficult mathematics, so difficult that it is impossible to solve the equations. So scientists employ a mathematical technique called perturbation theory, which makes it possible to solve very difficult problems with very good precision.