Leptons {muon}| can be more massive than electrons. They can be in particles caused by cosmic rays hitting upper atmosphere. Muons have masses 204 times electron mass or 106 MeV. Lifetime is 2.2 x 10^-6 seconds, because muon can decay to electron. Muons have electric charge -1. Muon has associated neutrino. Muon has weak-isospin third component -1/2.
Atoms can have muons instead of electrons. Collisions can make two muons {dimuon event} or three muons {trimuon event}. These collisions demonstrate charmed particles and heavy leptons.
Physical Sciences>Physics>Matter>Particle>Subatomic>Fermion>Lepton
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Date Modified: 2022.0224