Lepton pair production by high-energy neutrino in an external   electromagnetic field
  The process of the lepton pair production by a neutrino propagating in an external electromagnetic field is investigated in the framework of the Standard Model. Relatively simple exact expression for the probability as the single integral is obtained, which is suitable for a quantitative analysis. 
A.V. Kuznetsov, N.V. Mikheev, D.A. Rumyantsev (Yaroslavl State   (Demidov) University, Russia)