Search for electron neutrino appearance at the Δm2∼1 eV2 scale

The MiniBooNE Collaboration reports first results of a search for nu(e) appearance in a nu(mu) beam. With two largely independent analyses, we observe no significant excess of events above the background for reconstructed neutrino energies above 475 MeV. The data are consistent with no oscillations within a two-neutrino appearance-only oscillation model.