Physicists analyzing data from a past experiment on electronlike particles called muons suspect that something unknown affected the particles' behavior. This sign of a shadowy influence has shown up in measurements of muons racing around a large subatomic-particle storage ring at Brookhaven National Laboratory in Upton, N.Y.
Immersed in a uniform magnetic field, muons are expected to wobble like spinning tops. However, in the new data analysis, physicists found that the muons wobbled faster than predicted by the standard model, the prevailing theory of particle physics.
Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.