On the production of a lepton pair in the collision of ultrarelativistic neutral particle with nonzero magnetic moment with nuclei

Explicit formulas which describe muon pair production in reaction γν→μ+μ−ν through neutrino magnetic moment are obtained and used to derive in the leading approximation cross section of muon pair production in νN-scattering due to neutrino magnetic moment. This cross section appears to be proportional to log4Eν. Comparison with experimental data on tridents production provides an upper bound μνμ<4×10−8μB, which is approximately two orders of magnitude weaker than that from νμe elastic scattering data.