ALICE detects the conversion of lead into gold at the LHC

“The ALICE analysis shows that, during Run 2 of the LHC (2015–2018), about 86 billion gold nuclei were created at the four major experiments.”

The LHC turns lead into gold. Run 2 made 86 billion gold nuclei, about 29 picograms in total. Each one broke apart almost at once. The same process limits how well the collider performs.