Conserved muonic number may turn out to be a conserved muonic charge, coupled to muonic photons, γ μ . Muons and muonic neutrinos would emit γ μ 's, which might be discovered by analysing the data from the past and future high energy neutrino experiments (like CHARM II, CCFR, CHORUS, NOMAD, etc.). There are two sources of γ μ 's in these experiments: (1) internal bremsstrahlung in pion and kaon decays into μ and ν μ , which provide neutrino beams; (2) external bremsstrahlung of muons in the shielding of the neutrino beam. In both cases the γ μ 's would pass freely through the shielding and produce narrow muonic pairs in the neutrino detectors. These pairs could be distinguished from the trident events (ν μ + Z -> ν μ + μ + + μ - + Z) by their kinematical properties: small p t of the muon pair, small invariant mass, etc. All the above processes are quantitatively analysed in this paper.