MINOS Document 6565-v2

A Search for Muon Neutrino to Electron Neutrino Oscillations in the MINOS Experiment

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J Pedro Ochoa
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J Pedro Ochoa
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02 Nov 2009, 20:06
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04 Nov 2009, 18:32
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04 Dec 2009, 15:23
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We perform a search for muon neutrino to electron neutrino oscillations, a process which would manifest a nonzero value of the theta-13 mixing angle, in the MINOS long-baseline neutrino oscillation experiment. The analysis consists of searching for an excess of electron neutrino charged-current candidate events over the predicted backgrounds, made mostly of neutral-current events with high electromagnetic content. A novel technique to select electron neutrino events is developed, which achieves an improved separation between the signal and the backgrounds, and which consequently yields a better reach in theta-13. The backgrounds are predicted in the Far Detector from Near Detector measurements. An excess is observed in the Far Detector data over the predicted backgrounds, which is consistent with the background-only hypothesis at 1.2 standard deviations.
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This is my thesis, that I defended on Oct. 21 2009.
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