The Mysterious Forces Inside the Nucleus Grow a Little Less Strange

Billions of times each minute, the Large Hadron Collider (LHC) smashes protons together, unleashing a maelstrom of energy that crystallizes into more protons, neutrons, and less familiar cousins of the nuclear particles. Some particles encounter each other as they flee the scene. What happens next — whether a given pair pulls together or pushes apart — physicists generally can’t say.

Source