Significant Excess of Electron-Like Events in the MiniBooNE Short-Baseline Neutrino Experiment*

The latest MiniBooNE oscillation results with 12.84e20 protons on target (POT) of electron neutrino appearance data, doubled from the previous oscillation publication, and 11.27e20 POT of electron antineutrino appearance data will be presented. A 4.7 sigma excess (460.5+/-99.0 events) is observed for a combined analysis with electron neutrino and electron antineutrino events. The observed excess is consistent with the excess reported by the LSND experiment. The best oscillation fit to the excess has a probability of 21.1% in a two-neutrino interpretation, which would require at least one more neutrino type beyond the three-neutrino paradigm.