Measurement of electron-neutrino electron elastic scattering
Abstract
The cross section for the elastic scattering reaction nue+e- -> nue+e- was measured by the Liquid Scintillator Neutrino Detector using a mu+ decay-at-rest nue 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, sigmanue e-=[10.1 +- 1.1(stat.) +- 1.0(syst.)]x Enue (MeV) x 10-45 cm2, 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 ISM=-1.09. Limits are placed on neutrino flavor-changing neutral currents. An upper limit on the muon-neutrino magnetic moment of 6.8 x 10-10 muBohr is obtained using the numu and numu fluxes from pi+ and mu+ decay.
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