The muon is an elementary particle. It has a negative electric charge and half spin. Its symbol is "μ^-". It is a type of lepton.

The muon has an average life time of 2.2 micro-seconds or 0.0000022 seconds.
A muon is like an electron, but it is 200 times heavier. Unlike an electron, it decays into other particles. The superparticle of a muon is called a "smuon."