Van Thanh McGary

A Search for Electron Antineutrino Appearance at the

The MiniBooNE Collaboration reports initial results from a search for

\Delta m^2 \sim

\bar{\nu}_{\mu}\to\bar{\nu}_e

1

oscillations. A signal-blind analysis was performed using a data sample corresponding to

\mathrm{eV}^{2}

3.39 \times 10^{20}

Scale

protons on target. The data are consistent with background prediction across the full range of neutrino energy reconstructed assuming quasielastic scattering,

Measurement ofνμ-induced charged-current neutral pion production cross sections on mineral oil atEν∈0.5–2.0GeV

200<E_{\nu}^{QE}<3000

Measurement ofνμandν¯μinduced neutral current singleπ0production cross sections on mineral oil atEν∼O(1 GeV)

MeV: 144 electron-like events have been observed in this energy range, compared to an expectation of

Search for Electron Antineutrino Appearance at theΔm2∼1eV2Scale

139.2 \pm 17.6

Search for Electron Antineutrino Appearance at the Delta m(2) similar to 1 eV(2) Scale

events. No significant excess of events has been observed, both at low energy, 200-475 MeV, and at high energy, 475-1250 MeV. The data are inconclusive with respect to antineutrino oscillations suggested by data from the Liquid Scintillator Neutrino Detector at Los Alamos National Laboratory.

Search for electron antineutrino appearance at the deltam(2) approximately 1 eV(2) Scale.

The authors would like to acknowledge the support of Fermilab, the Department of Energy, and the National Science Foundation in the construction, operation, and data analysis of the Mini Booster Neutrino Experiment.