Search for muon-neutrino to electron-neutrino transitions in MINOS

Details Search for muon-neutrino to electron-neutrino transitions in MINOS Search for muon-neutrino to electron-neutrino transitions in MINOS

2009-09-28

arxiv.org/abs/0909.4996v1

Phys.Rev.Lett.103:261802,2009

Physics

High Energy Physics

High Energy Physics - Experiment

5 pages, 4 figures, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.103.261802

This letter reports on a search for $\nu_\mu \to \nu_e$ transitions by the MINOS experiment based on a \unit[$3.14\times10^{20}$]{protons-on-target} exposure in the Fermilab NuMI beam. We observe 35 events in the Far Detector with a background of $27\pm 5 {\rm (stat.)} \pm 2 {\rm (syst.)$ events predicted by the measurements in the Near Detector. If interpreted in terms of $\nu_\mu \to \nu_e$ oscillations, this 1.5 $\sigma$ excess of events is consistent with $\sin^{2}(2\theta_{13})$ comparable to the CHOOZ limit when $|\delmsq{}|$=\unit[2.43$\times 10^{-3}$] {${\rm eV^{2}}$} and \sinsq{23}=1.0 are assumed.

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