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Center for Nonlinear Studies |
The first MiniBooNE electron neutrino appearance oscillation result published in April of 2007 ruled out a simple, CP-conserving two neutrino oscillation explanation of the LSND signal above a reconstructed neutrino energy of 475 MeV. However, MiniBooNE unexpectedly observed a significant excess of electron-like events below a reconstructed neutrino energy of 475 MeV. For the last four year MiniBooNE has been running in antineutrino mode, which can directly test the LSND oscillation signal. At present, with 5.66E20 POT, the MiniBooNE antineutrino data are consistent with the LSND oscillation signal. If this result is confirmed with higher statistics and by other experiments, then it will imply the existence of sterile neutrinos and CP violation in the lepton sector.
Host: Sanjay Reddy, reddy@lanl.gov