Experimental Limit on ν μ +e - -->ν μ +e - and the Existence of Weakly Coupled Neutral Lepton Currents

摘要: A recent analysis by Steiner of the CERN neutrino spark-chamber experiment is employed to derive an upper limit on elastic cross section for ${\ensuremath{\nu}}_{\ensuremath{\mu}}\ensuremath{-}{e}^{\ensuremath{-}}$ scattering. The obtained just at a level consistent with theoretical predicted neutral lepton currents coupled form weak isospin-invariant Hamiltonian.