Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 889

The DOI matches its Crossref record.

Indications of Neutrino Oscillation in a 250 km Long-Baseline Experiment

Open access
Ahn, M. H., Aoki, S., Bhang, H., Boyd, S., Casper, D., Choi, J. H., Fukuda, S., Fukuda, Y., Gajewski, W., Hara, T., Hasegawa, M., Hasegawa, T., Hayato, Y., Hill, J., Ichikawa, A. K., Ikeda, A., Inagaki, T., Ishida, T., Ishii, T., Ishitsuka, M., Itow, Y., Iwashita, T., Jang, H. I., Jang, J. S., Jeon, E. J., Jung, C. K., Kajita, T., Kameda, J., Kaneyuki, K., Kato, I., Kearns, E., Kibayashi, A., Kielczewska, D., Kobayashi, K., Kim, B. J., Kim, C. O., Kim, J. Y., Kim, S. B., Kobayashi, T., Kohama, M., Koshio, Y., Kropp, W. R., Learned, J. G., Lim, S. H., Lim, I. T., Maesaka, H., Martens, K., Maruyama, T., Matsuno, S., Mauger, C., Mcgrew, C., Mine, S., Miura, M., Miyano, K., Moriyama, S., Nakahata, M., Nakamura, K., Nakano, I., Nakata, F., Nakaya, T., Nakayama, S., Namba, T., Nishikawa, K., Nishiyama, S., Noda, S., Obayashi, A., Okada, A., Ooyabu, T., Oyama, Y., Pac, M. Y., Park, H., Sakuda, M., Sakurai, N., Sasao, N., Scholberg, K., Sharkey, E., Shiozawa, M., So, H., Sobel, H. W., Stachyra, A., Stone, J. L., Suga, Y., Sulak, L. R., Suzuki, A., Suzuki, Y., Takeuchi, Y., Tamura, N., Toshito, T., Totsuka, Y., Vagins, M. R., Walter, C. W., Wilkes, R. J., Yamada, S., Yamamoto, S., Yanagisawa, C., Yokoyama, H., Yoo, J., Yoshida, M., Zalipska, J.·2003·Physical Review Letters

Abstract

The K2K experiment observes indications of neutrino oscillation: a reduction of nu(mu) flux together with a distortion of the energy spectrum. Fifty-six beam neutrino events are observed in Super-Kamiokande (SK), 250 km from the neutrino production point, with an expectation of 80.1(+6.2)(-5.4). Twenty-nine one ring mu-like events are used to reconstruct the neutrino energy spectrum, which is better matched to the expected spectrum with neutrino oscillation than without. The probability that the observed flux at SK is explained by statistical fluctuation without neutrino oscillation is less than 1%.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1103/physrevlett.90.041801

Cites

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cited by

See all 889

Metadata

Authors
Ahn, M. H., Aoki, S., Bhang, H., Boyd, S., Casper, D., Choi, J. H., Fukuda, S., Fukuda, Y., Gajewski, W., Hara, T., Hasegawa, M., Hasegawa, T., Hayato, Y., Hill, J., Ichikawa, A. K., Ikeda, A., Inagaki, T., Ishida, T., Ishii, T., Ishitsuka, M., Itow, Y., Iwashita, T., Jang, H. I., Jang, J. S., Jeon, E. J., Jung, C. K., Kajita, T., Kameda, J., Kaneyuki, K., Kato, I., Kearns, E., Kibayashi, A., Kielczewska, D., Kobayashi, K., Kim, B. J., Kim, C. O., Kim, J. Y., Kim, S. B., Kobayashi, T., Kohama, M., Koshio, Y., Kropp, W. R., Learned, J. G., Lim, S. H., Lim, I. T., Maesaka, H., Martens, K., Maruyama, T., Matsuno, S., Mauger, C., Mcgrew, C., Mine, S., Miura, M., Miyano, K., Moriyama, S., Nakahata, M., Nakamura, K., Nakano, I., Nakata, F., Nakaya, T., Nakayama, S., Namba, T., Nishikawa, K., Nishiyama, S., Noda, S., Obayashi, A., Okada, A., Ooyabu, T., Oyama, Y., Pac, M. Y., Park, H., Sakuda, M., Sakurai, N., Sasao, N., Scholberg, K., Sharkey, E., Shiozawa, M., So, H., Sobel, H. W., Stachyra, A., Stone, J. L., Suga, Y., Sulak, L. R., Suzuki, A., Suzuki, Y., Takeuchi, Y., Tamura, N., Toshito, T., Totsuka, Y., Vagins, M. R., Walter, C. W., Wilkes, R. J., Yamada, S., Yamamoto, S., Yanagisawa, C., Yokoyama, H., Yoo, J., Yoshida, M., & Zalipska, J.
Venue
Physical Review Letters
Published
2003-01-30
Volume
90
Issue
4
Pages
041801-041801
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
OpenAlex
W2144091494
Cited by
889
References
0
FWCI
79.04
Type
journal article
Language
en
Open access
green

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: Indications of Neutrino Oscillation in a 250 km Long-Baseline Experiment. https://app.cochat.ai/papers/10.1103/physrevlett.90.041801
The paper
Ahn, M. H., Aoki, S., Bhang, H., Boyd, S., Casper, D., Choi, J. H., Fukuda, S., Fukuda, Y., Gajewski, W., Hara, T., Hasegawa, M., Hasegawa, T., Hayato, Y., Hill, J., Ichikawa, A. K., Ikeda, A., Inagaki, T., Ishida, T., Ishii, T., . . . Zalipska, J. (2003). Indications of Neutrino Oscillation in a 250 km Long-Baseline Experiment. Physical Review Letters. https://doi.org/10.1103/physrevlett.90.041801

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.