Muon

In the Standard Model of particle physics, a muon (from Greek letter mu used to represent it) is a semistable fundamental particle with negative electric charge and a spin of 1/2. Together with the electron, the tauon and the neutrinos, it is classified as part of the lepton family of fermions. Like all fundamental particles, the muon has an antimatter partner of opposite charge but equal mass and spin: the antimuon.

References

• Serway & Faughn, College Physics, Fourth Edition (Fort Worth TX: Saunders, 1995) page 841
• Emanuel Derman, My Life As A Quant (Hoboken, NJ: Wiley, 2004) pp. 58-62.