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

Bibliographical note

Funding Information:
The author wishes to thank the K2K collaboration and all its sponsors, and recognize the effort of the KEK machine group and beam channel group. This work is also supported by the U.S. Department of Energy.

Keywords

Long-baseline
Neutrino
Neutrino oscillation

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10.1142/S0217751X05025735

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title = "New results from the K2K experiment",

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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author = "Richard Gran",

note = "Funding Information: The author wishes to thank the K2K collaboration and all its sponsors, and recognize the effort of the KEK machine group and beam channel group. This work is also supported by the U.S. Department of Energy.",

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N2 - 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.

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.

KW - Long-baseline

KW - Neutrino

KW - Neutrino oscillation

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New results from the K2K experiment

Abstract

Bibliographical note

Keywords

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