MINOS Document 1119-v1

A Study of Atmospheric Neutrino Oscillations in the MINOS Far Detector

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Andy Blake
Updated by:
Andy Blake
Document Created:
07 Oct 2005, 15:03
Contents Revised:
19 Jun 2008, 07:56
Metadata Revised:
16 Jan 2009, 16:46
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A study of atmospheric neutrino oscillations in the Far Detector is presented based on a total detector exposure of 316 days. The calibration, simulation and reconstruction of the data are described, and the separation of atmospheric neutrinos from the high background of cosmic muons is outlined. A total of 82 candidate events are observed, with an expectation of 109.9 +/- 21.4 events in the absence of oscillations. Of the selected events, 40 have a clearly identified charge, with 27 events tagged as neutrinos and 13 events tagged as anti-neutrinos. This represents the first direct observation of atmospheric neutrinos and anti-neutrinos. A maximum likelihood analysis is used to determine the allowed oscillation region. This disfavours the null oscillation hypothesis at the 79% confidence level.
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Notes and Changes:
June 2008 - added the pdf version!
Referenced by:
  • MINOS-doc-4771: Archive of Old Timing Calibration Talks
  • MINOS-doc-4926: Far Detector Timing Calibration
Publication Information:
PhD Thesis (Cambridge University, August 2005)
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