The updated measurement questions the laws of nature that treat electrons and their heavier cousins, muons, identically, except for small differences due to their different masses. 

According to the Standard Model, muons and electrons interact with all forces in the same way, so beauty quarks created at LHCb should decay into muons just as often as they do to electrons.

But these new measurements suggest the decays could be happening at different rates, which could suggest never-before-seen particles tipping the scales away from muons.
— Read on scitechdaily.com/new-result-from-large-hadron-collider-challenges-leading-theory-in-physics-cannot-be-explained-by-our-current-laws-of-nature/amp/