Hi I've been reading that muons are supposedly leptons (elementary particles), in the past confused for mesons (hadronic particles). They are clearly not mesons, which are composed of a quark and an antiquark. But i've also read that muons decay to an electron and two neutrinos of different types. So my question is simple, aren't leptons supposed to be elementary particles, not composed of any other particles? If muons are composed of an electron and neutrinos, how can a muon be a lepton? What am i missing? Thank you for you answers. Cheers, Val.