How to Measure a Muon's Magnetic Field

Theoriess predict, based on all the things that the muon can do, of what this magnetic field should be. We have a number that experimentalists spent 20 years measuring. And they're not the same. They did it in a really cool way. They added like a random offset to all the numbers that sort of hidden. It's like a hidden key to the data,. So even the people working on this experiment for the last decade or so didn't know the answer until six weeks ago. When they cracked open this key and they typed it in, we finally saw the answer.