Explicit formulas which describe muon pair production in reaction $\gamma\nu \to \mu^+ \mu^- \nu$ through neutrino magnetic moment are obtained and used to derive in the leading approximation cross section of muon pair production in $\nu N$-scattering due to neutrino magnetic moment. This cross section appears to be proportional to $\log^4 E_{ \nu}$. Comparison with experimental data on tridents production provides an upper bound $\mu_{ \nu_{ \mu}} < 4*10^{ -8} \mu_B$, which is approximately two orders of magnitude weaker than that from $\nu_{ \mu}e$ elastic scattering data.
Categories: hep-ph