The delicate balance of lepton flavours
A new measurement of lepton flavor universality, a key feature of the Standard Model, in decays of the W boson is more precise than all previous measurements combined.
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.
