Since the two experiments have already conflicting results, this likely will/should be replicated, before we can believe this result. As an example, this experiment on neutrinos traveling faster than light was later proved wrong. https://www.nature.com/articles/news.2011.554.
I'm increasingly moving towards first introspection, "am I feeling surprised or upset at this?" and if true, I skip reading it. It's a trick that can't always be applied of course, but in situations like this one, it's a pretty good one.
Also, all the "will surprise you", "happens next", etc are instant ctrl+w (close tab).
The result, published in the journal Science, could be related to hints from other experiments at Fermilab and the Large Hadron Collider at the Swiss-French border. These, as yet unconfirmed results, also suggest deviations from the Standard Model, possibly as a result of an as yet undiscovered fifth force of nature at play.
But the excitement in the physics community is tempered with a loud note of caution. Although the Fermilab result is the most accurate measurement of the mass of the W boson to date, it is at odds with two of the next most accurate measurements from two separate experiments which are in line with the Standard Model.