Possible evidence of Lepton Flavour Violation
Remarkable there appears to be some evidence that muons are not behaving the same as electrons. This is from our LHCb experiment at CERN. The results has about 1:1000 chance of being a statistical fluke.
There is a lot more information in the LHCb news article (https://home.cern/news/news/physics/intriguing-new-result-lhcb-experiment-cern) where you can find a linke to the article itself.
This will be especially interesting when new results from g-2 are finally announced