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Recent results from the K2K experiment

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Title: Recent results from the K2K experiment
Authors: Hayato, Y.1
Source: Nuclear Physics B Proceedings Supplement. Apr2003 Supplement 1, Vol. 117 Issue 1-3, p18. 6p.
Subjects: Neutrinos, Oscillations, Atmosphere, Spectrum analysis
Abstract: Since 1999, the KEK to Kamioka long-baseline neutrino experiment (K2K) has begun its investigation of neutrino oscillations suggested by atmospheric neutrino observations. Until July 2001, we have accumulated 4.8 × 1019 protons on target and observed 56 in-fiducial events at Super-Kamiokande detector, which is located 250km from KEK. The expected number of events is estimated to be 80.1−5.4+6.2. We fit the neutrino oscillation parameters by using the observed number of events and measured energy spectrum of neutrinos. The probability to observe only 56 events and such an energy spectrum due to statistical fluctuation is less than 1%. Also, the favored oscillation parameter region agrees well with the one suggested by the atmospheric neutrino experiments. [Copyright &y& Elsevier]
Copyright of Nuclear Physics B Proceedings Supplement is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Recent results from the K2K experiment
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  Data: Since 1999, the KEK to Kamioka long-baseline neutrino experiment (K2K) has begun its investigation of neutrino oscillations suggested by atmospheric neutrino observations. Until July 2001, we have accumulated 4.8 × 1019 protons on target and observed 56 in-fiducial events at Super-Kamiokande detector, which is located 250km from KEK. The expected number of events is estimated to be 80.1−5.4+6.2. We fit the neutrino oscillation parameters by using the observed number of events and measured energy spectrum of neutrinos. The probability to observe only 56 events and such an energy spectrum due to statistical fluctuation is less than 1%. Also, the favored oscillation parameter region agrees well with the one suggested by the atmospheric neutrino experiments. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Nuclear Physics B Proceedings Supplement is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/S0920-5632(03)90479-8
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      – SubjectFull: Oscillations
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      – SubjectFull: Atmosphere
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      – SubjectFull: Spectrum analysis
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      – TitleFull: Recent results from the K2K experiment
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              Text: Apr2003 Supplement 1
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