Measurement of electron-neutrino electron elastic scattering

This is the authors' abstract. We don't add key points for this paper.

The cross section for the elastic scattering reaction νₑ+e^-→νₑ+e^- was measured by the Liquid Scintillator Neutrino Detector using a μ⁺ decay-at-rest νₑ beam at the Los Alamos Neutron Science Center. The standard model of electroweak physics predicts a large destructive interference between the charge current and neutral current channels for this reaction. The measured cross section, ${{σ}}_{{{ν}}ₑ{e}^{{-}}}=[10.1±{}1.1(stat)±{}1.0(syst)]×{}{E}_{{{ν}}ₑ}(MeV)×{}{10}^{{-}45}{cm}²,$ agrees well with standard model expectations. The measured value of the interference parameter, $I={-}1.01±{}0.13(stat)±{}0.12(syst),$ is in good agreement with the standard model expectation of ${I}SM={-}1.09.$ Limits are placed on neutrino flavor-changing neutral currents. An upper limit on the muon-neutrino magnetic moment of $6.8×{}{10}^{{-}10}{{μ}}Bohr$ is obtained using the ${{ν}}_{{μ}}$ and ${{{ν}}}_{{μ}}$ fluxes from ${{π}}⁺$ and ${{μ}}⁺$ decay.