# Evidence for muon neutrino oscillation in an accelerator-based experiment

Source: [Evidence for muon neutrino oscillation in an accelerator-based experiment](<https://www.sota2.com/research/paper/68fa34381e209131ce896b52>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T20:30:18.930Z

Authors: K2K Collaboration: E. Aliu, et al

Published: 2004-11-10T12:23:08.000Z

## Abstract

We present results for muon neutrino oscillation in the KEK to Kamioka (K2K) long-baseline neutrino oscillation experiment. K2K uses an accelerator-produced muon neutrino beam with a mean energy of 1.3 GeV directed at the Super-Kamiokande detector. We observed the energy dependent disappearance of muon neutrino, which we presume have oscillated to tau neutrino. The probability that we would observe these results if there is no neutrino oscillation is 0.0050% (4.0 sigma).

## Recorded benchmark results

A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage.

## Original sources and implementation

[Original paper](<https://arxiv.org/abs/hep-ex/0411038>)

[PDF](<https://arxiv.org/pdf/hep-ex/0411038.pdf>)