muon fermilab standard model physics.

Final results from a long-running U.S.-based experiment show a tiny particle continues to act strangely — but that’s still good news for the laws of physics as we know them. The mysterious particles called muons wobble like a top when inside a magnetic field. Previous experiments found the muons were behaving strangely, which didn’t fit well with the foundational rulebook of physics. New data adds fuel to that fire, but scientists have found a way to make the findings agree with the Standard Model of Physics. Results were announced Tuesday and were submitted to the journal Physical Review Letters.