SEARCH FOR MUON-NEUTRINO OSCILLATIONS NU-MU-]NU-E (NU-BAR-MU-]NU-BAR-E) IN A WIDE-BAND NEUTRINO BEAM

We present the results of a search for neutrino oscillations at the Brookhaven National Laboratory. The experiment searched for the appearance of nu(e) (nu(e)BAR), 1 km from the source of a wide-band nu(mu) (nu(mu)BAR) beam. The experiment used a total of 3 x 10(19) protons on target from the Alternating Gradient Synchrotron. The data collecting was split evenly between positive and negative horn polarities, corresponding to neutrino and antineutrino beams. No excess of nu(e) or nu(e)BAR over the expected background was detected. The 90%-confidence-level limits obtained are DELTA-m2 less-than-or-equal-to 0.075 eV2 for maximal mixing, and sin (2)2-theta less-than-or-equal-to 0.003 for large DELTA-m2.