Elsevier

Nuclear Physics B

Volume 335, Issue 3, 14 May 1990, Pages 517-545
Nuclear Physics B

A search for neutrino oscillations

https://doi.org/10.1016/0550-3213(90)90516-GGet rights and content

Abstract

A search for νμνe (and νμνe) oscillations has been conducted with the AGS wide-band neutrino beam at Brookhaven National Laboratory. Neutrino interactions in a fine-grained calorimeter have been analyzed with an emphasis on events with associated electromagnetic showers. The granularity of the detector allowed the separation of electron showers in νe (νe) interactions from a background of photon conversions. The number of events with an electron turns out to be about twice the expectation from the beam composition but the statistical significance is only about two standard deviations.

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This research was supported in part by the US Department of Energy under contract number DE-AC02-76CH00016 and seed money from Boston University.

1

The group owes much to Claude Detraz (CERN) and Albert Diaczek (Collège de France, Paris) who carried out the installation with great speed and alacrity. We would also like to thank the following people in BNL for their help and advice: D. Lazarus, D. Lowenstein, C. Pearson, T. Blair, E. Bihn, F. Simes and L. Wells. Many thanks also go to M. Devynck at Boston University. Useful information on the neutrino interaction simulation used in the CERN-based experiments has been provided by S. Katsanevas.

∗∗∗

Now at Laboratori Nazionali di Legnaro, INFN,Italy.

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