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

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

doi:10.1103/PhysRevLett.90.041801

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

M. H. Ahn
, S. Aoki
, H. Bhang
, S. Boyd
, D. Casper
, J. H. Choi
, S. Fukuda
, Y. Fukuda
, W. Gajewski
, T. Hara
, M. Hasegawa
, T. Hasegawa
, Y. Hayato
, J. Hill
, A. K. Ichikawa
, A. Ikeda
, T. Inagaki
, T. Ishida
, T. Ishii
, M. Ishitsuka

Y. Itow, T. Iwashita, H. I. Jang, J. S. Jang, E. J. Jeon, C. K. Jung, T. Kajita, J. Kameda, K. Kaneyuki, I. Kato, E. Kearns, A. Kibayashi, D. Kielczewska, K. Kobayashi, B. J. Kim, C. O. Kim, J. Y. Kim, S. B. Kim, T. Kobayashi, M. Kohama, Y. Koshio, W. R. Kropp, J. G. Learned, S. H. Lim, I. T. Lim, H. Maesaka, K. Martens, T. Maruyama, S. Matsuno, C. Mauger, C. McGrew, S. Mine, M. Miura, K. Miyano, S. Moriyama, M. Nakahata, K. Nakamura, I. Nakano, F. Nakata, T. Nakaya, S. Nakayama, T. Namba, K. Nishikawa, S. Nishiyama, S. Noda, A. Obayashi, A. Okada, T. Ooyabu, Y. Oyama, M. Y. Pac, H. Park, M. Sakuda, N. Sakurai, N. Sasao, K. Scholberg, E. Sharkey, M. Shiozawa, H. So, H. W. Sobel, A. Stachyra, J. L. Stone, Y. Suga, L. R. Sulak, A. Suzuki, Y. Suzuki, Y. Takeuchi, N. Tamura, T. Toshito, Y. Totsuka, M. R. Vagins, C. W. Walter, R. J. Wilkes, S. Yamada, S. Yamamoto, C. Yanagisawa, H. Yokoyama, J. Yoo, M. Yoshida, J. Zalipska

Physics and Astronomy

Seoul National University
Kobe University
University of Washington
University of California at Irvine
Chonnam National University
The University of Tokyo
Kyoto University
Tohoku University
High Energy Accelerator Research Organization, Institute of Particle and Nuclear Physics
Stony Brook University
Okayama University
Boston University
University of Hawai'i at Mānoa
University of Warsaw
Korea University
Niigata University
Dongshin University
Massachusetts Institute of Technology
Tokyo University of Science

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Abstract

The K2K experiment observes indications of neutrino oscillation: a reduction of [Formula presented] 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 [Formula presented]. Twenty-nine one ring [Formula presented]-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%.

Original language	English
Pages (from-to)	5
Number of pages	1
Journal	Physical Review Letters
Volume	90
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.90.041801
State	Published - 2003

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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, 90(4), 5. https://doi.org/10.1103/PhysRevLett.90.041801

@article{58f06150078d40099f967b8684bf000d,

title = "Indications of Neutrino Oscillation in a 250 km Long-Baseline Experiment",

abstract = "The K2K experiment observes indications of neutrino oscillation: a reduction of [Formula presented] 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 [Formula presented]. Twenty-nine one ring [Formula presented]-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\%.",

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

year = "2003",

doi = "10.1103/PhysRevLett.90.041801",

language = "English",

volume = "90",

pages = "5",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "4",

}

Ahn, MH, Aoki, S, Bhang, H, Boyd, S, Casper, D, Choi, JH, Fukuda, S, Fukuda, Y, Gajewski, W, Hara, T, Hasegawa, M, Hasegawa, T, Hayato, Y, Hill, J, Ichikawa, AK, Ikeda, A, Inagaki, T, Ishida, T, Ishii, T, Ishitsuka, M, Itow, Y, Iwashita, T, Jang, HI, Jang, JS, Jeon, EJ, Jung, CK, Kajita, T, Kameda, J, Kaneyuki, K, Kato, I, Kearns, E, Kibayashi, A, Kielczewska, D, Kobayashi, K, Kim, BJ, Kim, CO, Kim, JY, Kim, SB, Kobayashi, T, Kohama, M, Koshio, Y, Kropp, WR, Learned, JG, Lim, SH, Lim, IT, 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, MY, Park, H, Sakuda, M, Sakurai, N, Sasao, N, Scholberg, K, Sharkey, E, Shiozawa, M, So, H, Sobel, HW, Stachyra, A, Stone, JL, Suga, Y, Sulak, LR, Suzuki, A, Suzuki, Y, Takeuchi, Y, Tamura, N, Toshito, T, Totsuka, Y, Vagins, MR, Walter, CW, Wilkes, RJ, Yamada, S, Yamamoto, S, Yanagisawa, C, Yokoyama, H, Yoo, J, Yoshida, M & Zalipska, J 2003, 'Indications of Neutrino Oscillation in a 250 km Long-Baseline Experiment', Physical Review Letters, vol. 90, no. 4, pp. 5. https://doi.org/10.1103/PhysRevLett.90.041801

TY - JOUR

T1 - Indications of Neutrino Oscillation in a 250 km Long-Baseline Experiment

AU - Ahn, M. H.

AU - Aoki, S.

AU - Bhang, H.

AU - Boyd, S.

AU - Casper, D.

AU - Choi, J. H.

AU - Fukuda, S.

AU - Fukuda, Y.

AU - Gajewski, W.

AU - Hara, T.

AU - Hasegawa, M.

AU - Hasegawa, T.

AU - Hayato, Y.

AU - Hill, J.

AU - Ichikawa, A. K.

AU - Ikeda, A.

AU - Inagaki, T.

AU - Ishida, T.

AU - Ishii, T.

AU - Ishitsuka, M.

AU - Itow, Y.

AU - Iwashita, T.

AU - Jang, H. I.

AU - Jang, J. S.

AU - Jeon, E. J.

AU - Jung, C. K.

AU - Kajita, T.

AU - Kameda, J.

AU - Kaneyuki, K.

AU - Kato, I.

AU - Kearns, E.

AU - Kibayashi, A.

AU - Kielczewska, D.

AU - Kobayashi, K.

AU - Kim, B. J.

AU - Kim, C. O.

AU - Kim, J. Y.

AU - Kim, S. B.

AU - Kobayashi, T.

AU - Kohama, M.

AU - Koshio, Y.

AU - Kropp, W. R.

AU - Learned, J. G.

AU - Lim, S. H.

AU - Lim, I. T.

AU - Maesaka, H.

AU - Martens, K.

AU - Maruyama, T.

AU - Matsuno, S.

AU - Mauger, C.

AU - McGrew, C.

AU - Mine, S.

AU - Miura, M.

AU - Miyano, K.

AU - Moriyama, S.

AU - Nakahata, M.

AU - Nakamura, K.

AU - Nakano, I.

AU - Nakata, F.

AU - Nakaya, T.

AU - Nakayama, S.

AU - Namba, T.

AU - Nishikawa, K.

AU - Nishiyama, S.

AU - Noda, S.

AU - Obayashi, A.

AU - Okada, A.

AU - Ooyabu, T.

AU - Oyama, Y.

AU - Pac, M. Y.

AU - Park, H.

AU - Sakuda, M.

AU - Sakurai, N.

AU - Sasao, N.

AU - Scholberg, K.

AU - Sharkey, E.

AU - Shiozawa, M.

AU - So, H.

AU - Sobel, H. W.

AU - Stachyra, A.

AU - Stone, J. L.

AU - Suga, Y.

AU - Sulak, L. R.

AU - Suzuki, A.

AU - Suzuki, Y.

AU - Takeuchi, Y.

AU - Tamura, N.

AU - Toshito, T.

AU - Totsuka, Y.

AU - Vagins, M. R.

AU - Walter, C. W.

AU - Wilkes, R. J.

AU - Yamada, S.

AU - Yamamoto, S.

AU - Yanagisawa, C.

AU - Yokoyama, H.

AU - Yoo, J.

AU - Yoshida, M.

AU - Zalipska, J.

PY - 2003

Y1 - 2003

N2 - The K2K experiment observes indications of neutrino oscillation: a reduction of [Formula presented] 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 [Formula presented]. Twenty-nine one ring [Formula presented]-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%.

AB - The K2K experiment observes indications of neutrino oscillation: a reduction of [Formula presented] 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 [Formula presented]. Twenty-nine one ring [Formula presented]-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%.

UR - https://www.scopus.com/pages/publications/84894082584

U2 - 10.1103/PhysRevLett.90.041801

DO - 10.1103/PhysRevLett.90.041801

M3 - Article

AN - SCOPUS:84894082584

SN - 0031-9007

VL - 90

SP - 5

JO - Physical Review Letters

JF - Physical Review Letters

IS - 4

ER -

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

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