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During this process the beauty quark turns into a strange quark and produces a pair of leptons—specifically, a lepton and its antimatter partner.

The Standard Model predicts that these beauty quark crashes should result in equal numbers of electrons and muons.

Hints of unexpected behaviour by a sub-atomic particle called the beauty quark could expose cracks in the foundations of this decades-old theory.

The mystery behaviour by the beauty quark may be the result of an as-yet undiscovered sub-atomic particle that is exerting a force.