New results from the K2K experiment

Richard Gran

doi:10.1142/S0217751X05025735

New results from the K2K experiment

Richard Gran

Physics & Astronomy (Duluth)

Research output: Contribution to journal › Article › peer-review

Abstract

The K2K long-baseline neutrino oscillation experiment has analyzed all data including the period ending in February 2004. The total data sample is from 8.9 × 10¹⁹ protons on target. We observe 108 events at the far detector, Super-Kamiokande, when 150.9 +11.6 -10.0 were expected. Further, we observe a distortion of the neutrino energy spectrum which is consistent with ν_μ to ν_τ oscillation. The probability that we would observe these results if there is no neutrino oscillation is 0.011%, a 3.9 σ significance.

Original language	English (US)
Pages (from-to)	3055-3058
Number of pages	4
Journal	International Journal of Modern Physics A
Volume	20
Issue number	14
DOIs	https://doi.org/10.1142/S0217751X05025735
State	Published - Jun 10 2005

Keywords

Long-baseline
Neutrino
Neutrino oscillation

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abstract = "The K2K long-baseline neutrino oscillation experiment has analyzed all data including the period ending in February 2004. The total data sample is from 8.9 × 1019 protons on target. We observe 108 events at the far detector, Super-Kamiokande, when 150.9 +11.6 -10.0 were expected. Further, we observe a distortion of the neutrino energy spectrum which is consistent with νμ to ντ oscillation. The probability that we would observe these results if there is no neutrino oscillation is 0.011%, a 3.9 σ significance.",

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AB - The K2K long-baseline neutrino oscillation experiment has analyzed all data including the period ending in February 2004. The total data sample is from 8.9 × 1019 protons on target. We observe 108 events at the far detector, Super-Kamiokande, when 150.9 +11.6 -10.0 were expected. Further, we observe a distortion of the neutrino energy spectrum which is consistent with νμ to ντ oscillation. The probability that we would observe these results if there is no neutrino oscillation is 0.011%, a 3.9 σ significance.

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