This article is optimistic that it's something new:
https://www.bbc.com/news/science-environment-66407099
Scientists at Fermilab, located near Chicago, have found evidence that could suggest the existence of a new force of nature. They noticed that sub-atomic particles muons aren't behaving as predicted by the Standard Model of physics. This deviation might be influenced by a previously unknown force.
Interestingly, while they refine their findings, a rival team at Europe's Large Hadron Collider is racing to find similar inconsistencies. If these results are confirmed, we could be on the brink of one of the most significant scientific discoveries since Einstein's relativity, as it might indicate a "fifth force" of nature.
But this one is not:
https://www.nature.com/articles/d41586-023-02532-6
While the discrepancy between experiment and theory has been a focal point for physicists, recent computational methods and alternative techniques provide predictions that align closely with the experimental findings.
"When the Muon g – 2 measurement is compared against this new prediction, the discrepancy essentially disappears."
"One possibility is that some of the earlier experiments did not fully take into account the peculiarities of their detectors."
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