<IMG SRC="navi.gif" WIDTH=160 HEIGHT=440 usemap="#navi" BORDER=0> What is the World Made of?     Lepton Decay Quiz

Which lepton decays are possible? Why or why not?:


(A tau lepton decays into an electron, an electron antineutrino, and a tau neutrino.)


(A tau lepton decays into a muon and a tau neutrino.)

Now try a tricky one:


(An electron decays into a muon, a muon antineutrino, and an electron neutrino.)