Muon G−2

Talk about raining on your colleagues' parade. On 7 April, a collaboration of more than 200 experimenters announced to great fanfare that a particle called the muon is slightly more magnetic than predicted by physicists' standard model, a discrepancy that could signal new particles waiting to be discovered ( Science , 9 April, p. [113][1]). But on the same day, 14 theorists published a paper that suggests the…

A groundbreaking experiment has possibly rewritten the rules of the universe. It couldn't have happened without this 17-ton electromagnet.

Combined results from Fermilab and Brookhaven show strong evidence that our best theoretical model of the subatomic world is incomplete.

Scientists are testing our fundamental understanding of the universe, and there's much more to discover.

Long-standing infinitesimal oddity could be a subtle sign of new particles

The first results from the Muon g-2 experiment hosted at Fermilab show fundamental particles called muons behaving in a way not predicted by the Standard Mod...

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Long-awaited news from Fermilab's Muon g-2 team may resolve a tantalizing conflict between nature and theory. But a separate calculation clouds the picture.

An unknown force seems to be making subatomic particles called muons act weirdly. That same force could be behind dark matter.

But this may not be the end of the story.

Only a 1-in-40,000 chance that combined results are due to a statistical fluctuation.

Preliminary results from two experiments suggest something could be wrong with the basic...

Muons and electrons might not experience the same fundamental interactions, contrary to Standard Model predictions

Earlier this week, Moncef Slaoui received the fruits of his labor: the first dose of a COVID-19 vaccine, from Moderna. "I feel a joy I am sure every person that has been vaccinated has felt—a form of liberation," says the former scientific head of Operation Warp Speed, the crash U.S. program that invested $11 billion in developing vaccines for the pandemic and purchasing hundreds of millions of doses. In 1986, the…

The discovery of the muon originally confounded physicists. Today international experiments are using the previously perplexing particle to gain a new understanding of our world.

The new results from the Muon g-2 experiment at Fermilab National Accelerator Laboratory strongly agree with those from the E821 experiment at Brookhaven National Laboratory, strengthening the evidence that there is new physics to discover.

The first result from the Muon g-2 experiment points to the existence of undiscovered particles or forces. These findings could have major implications for future particle physics experiments and could lead to greater understanding of how the universe works.

On Wednesday, a scientific measurement, recorded by this apparatus, was publicly released. This may not sound like much, but this single measurement tells scientists that their theory about what is called the standard model of particle physics is incomplete -- and has to be rethought, writes Don Lincoln.

Particles called muons are behaving weirdly, and that could mean a huge discovery.

Three times more precise than the previous record-holding determination, the result closely agrees with theoretical predictions but could still reveal pathways to new physics