Quarks in the looking glass
A recent experiment at Jefferson Lab probed the mirror symmetry of quarks, determining that one of their intrinsic properties is non-zero—as predicted by the Standard Model.
In 2023, the ALICE experiment was ready for their best year yet, until a mysterious signal threatened everything. As the LHC wraps up its 2025 lead-ion run, physicists recall how they worked together to solve the puzzle.