TY - JOUR AU - Aad, G. AU - Aguilar Saavedra, Juan Antonio AU - Atlas Collaboration PY - 2021 UR - http://hdl.handle.net/10481/70191 AB - Leptons with essentially the same properties apart from their mass are grouped into three families (or flavours). The number of leptons of each flavour is conserved in interactions, but this is not imposed by fundamental principles. Since the... LA - eng PB - Nature TI - Search for charged-lepton-flavour violation in Z-boson decays with the ATLAS detector DO - 10.1038/s41567-021-01225-z ER -