What is "muon neutrinos"

Usage examples of "muon neutrinos".

And just as the electron and antielectron are closely associated with electron neutrinos and electron antineutrinos, so are muons and antimuons associated with muon neutrinos and muon antineutrinos.

Electron neutrinos and muon neutrinos are both without mass and without charge and, indeed, have no distinguishing characteristics we know of, but they do not substitute for each other in nuclear reactions so there must be some difference.