Search for electron neutrino appearance in a 250 km long-baseline experiment

M. H. Ahn, S. Aoki, Y. Ashie, H. Bhang, S. Boyd, D. Casper, J. H. Choi, S. Fukuda, Y. Fukuda, R. Gran, T. Hara, M. Hasegawa, T. Hasegawa, K. Hayashi, Y. Hayato, J. Hill, A. K. Ichikawa, A. Ikeda, T. Inagaki, T. IshidaT. Ishii, M. Ishitsuka, Y. Itow, T. Iwashita, H. I. Jang, J. S. Jang, E. J. Jeon, K. K. Joo, C. K. Jung, T. Kajita, J. Kameda, K. Kaneyuki, I. Kato, E. Kearns, A. Kibayashi, D. Kielczewska, B. J. Kim, C. O. Kim, J. Y. Kim, S. B. Kim, K. Kobayashi, T. Kobayashi, Yusuke Koshio, W. R. Kropp, J. G. Learned, S. H. Lim, I. T. Lim, H. Maesaka, T. Maruyama, S. Matsuno, C. Mauger, C. Mcgrew, A. Minamino, S. Mine, M. Miura, K. Miyano, T. Morita, S. Moriyama, M. Nakahata, K. Nakamura, I. Nakano, F. Nakata, T. Nakaya, S. Nakayama, T. Namba, R. Nambu, K. Nishikawa, S. Nishiyama, S. Noda, Y. Obayashi, A. Okada, Y. Oyama, M. Y. Pac, H. Park, C. Saji, Makoto Sakuda, A. Sarrat, T. Sasaki, Noboru Sasao, K. Scholberg, M. Sekiguchi, E. Sharkey, M. Shiozawa, K. K. Shiraishi, M. Smy, H. W. Sobel, J. L. Stone, Y. Suga, L. R. Sulak, A. Suzuki, Y. Suzuki, Y. Takeuchi, N. Tamura, M. Tanaka, Y. Totsuka, S. Ueda, M. R. Vagins, C. W. Walter, W. Wang, R. J. Wilkes, S. Yamada, S. Yamamoto, C. Yanagisawa, H. Yokoyama, J. Yoo, M. Yoshida, J. Zalipska

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

The search for electron neutrino appearance from accelerator-produced muon neutrinos in the K2K 250 km long-baseline neutrino experiment was described. It was observed that one electron event was found in the data corresponding to an exposure of 4.8 × 1019 protons on target. The number of expected background neutrino events in the absence of neutrino oscillations was found to be 2.4±0.6 events and was found to be dominated by misidentification of events from neutral current production. The probability density function of the expected number of electron events was evaluated from the the Poisson distribution, which was convoluted with systematic uncertainty.

Original languageEnglish
Article number051801
JournalPhysical Review Letters
Volume93
Issue number5
DOIs
Publication statusPublished - Jul 30 2004
Externally publishedYes

Fingerprint

neutrinos
electrons
neutral currents
probability density functions
muons
accelerators
oscillations
protons

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Ahn, M. H., Aoki, S., Ashie, Y., Bhang, H., Boyd, S., Casper, D., ... Zalipska, J. (2004). Search for electron neutrino appearance in a 250 km long-baseline experiment. Physical Review Letters, 93(5), [051801]. https://doi.org/10.1103/PhysRevLett.93.051801

Search for electron neutrino appearance in a 250 km long-baseline experiment. / Ahn, M. H.; Aoki, S.; Ashie, Y.; Bhang, H.; Boyd, S.; Casper, D.; Choi, J. H.; Fukuda, S.; Fukuda, Y.; Gran, R.; Hara, T.; Hasegawa, M.; Hasegawa, T.; Hayashi, K.; 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.; Joo, K. K.; Jung, C. K.; Kajita, T.; Kameda, J.; Kaneyuki, K.; Kato, I.; Kearns, E.; Kibayashi, A.; Kielczewska, D.; Kim, B. J.; Kim, C. O.; Kim, J. Y.; Kim, S. B.; Kobayashi, K.; Kobayashi, T.; Koshio, Yusuke; Kropp, W. R.; Learned, J. G.; Lim, S. H.; Lim, I. T.; Maesaka, H.; Maruyama, T.; Matsuno, S.; Mauger, C.; Mcgrew, C.; Minamino, A.; Mine, S.; Miura, M.; Miyano, K.; Morita, T.; Moriyama, S.; Nakahata, M.; Nakamura, K.; Nakano, I.; Nakata, F.; Nakaya, T.; Nakayama, S.; Namba, T.; Nambu, R.; Nishikawa, K.; Nishiyama, S.; Noda, S.; Obayashi, Y.; Okada, A.; Oyama, Y.; Pac, M. Y.; Park, H.; Saji, C.; Sakuda, Makoto; Sarrat, A.; Sasaki, T.; Sasao, Noboru; Scholberg, K.; Sekiguchi, M.; Sharkey, E.; Shiozawa, M.; Shiraishi, K. K.; Smy, M.; Sobel, H. W.; Stone, J. L.; Suga, Y.; Sulak, L. R.; Suzuki, A.; Suzuki, Y.; Takeuchi, Y.; Tamura, N.; Tanaka, M.; Totsuka, Y.; Ueda, S.; Vagins, M. R.; Walter, C. W.; Wang, W.; Wilkes, R. J.; Yamada, S.; Yamamoto, S.; Yanagisawa, C.; Yokoyama, H.; Yoo, J.; Yoshida, M.; Zalipska, J.

In: Physical Review Letters, Vol. 93, No. 5, 051801, 30.07.2004.

Research output: Contribution to journalArticle

Ahn, MH, Aoki, S, Ashie, Y, Bhang, H, Boyd, S, Casper, D, Choi, JH, Fukuda, S, Fukuda, Y, Gran, R, Hara, T, Hasegawa, M, Hasegawa, T, Hayashi, K, 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, Joo, KK, Jung, CK, Kajita, T, Kameda, J, Kaneyuki, K, Kato, I, Kearns, E, Kibayashi, A, Kielczewska, D, Kim, BJ, Kim, CO, Kim, JY, Kim, SB, Kobayashi, K, Kobayashi, T, Koshio, Y, Kropp, WR, Learned, JG, Lim, SH, Lim, IT, Maesaka, H, Maruyama, T, Matsuno, S, Mauger, C, Mcgrew, C, Minamino, A, Mine, S, Miura, M, Miyano, K, Morita, T, Moriyama, S, Nakahata, M, Nakamura, K, Nakano, I, Nakata, F, Nakaya, T, Nakayama, S, Namba, T, Nambu, R, Nishikawa, K, Nishiyama, S, Noda, S, Obayashi, Y, Okada, A, Oyama, Y, Pac, MY, Park, H, Saji, C, Sakuda, M, Sarrat, A, Sasaki, T, Sasao, N, Scholberg, K, Sekiguchi, M, Sharkey, E, Shiozawa, M, Shiraishi, KK, Smy, M, Sobel, HW, Stone, JL, Suga, Y, Sulak, LR, Suzuki, A, Suzuki, Y, Takeuchi, Y, Tamura, N, Tanaka, M, Totsuka, Y, Ueda, S, Vagins, MR, Walter, CW, Wang, W, Wilkes, RJ, Yamada, S, Yamamoto, S, Yanagisawa, C, Yokoyama, H, Yoo, J, Yoshida, M & Zalipska, J 2004, 'Search for electron neutrino appearance in a 250 km long-baseline experiment', Physical Review Letters, vol. 93, no. 5, 051801. https://doi.org/10.1103/PhysRevLett.93.051801
Ahn, M. H. ; Aoki, S. ; Ashie, Y. ; Bhang, H. ; Boyd, S. ; Casper, D. ; Choi, J. H. ; Fukuda, S. ; Fukuda, Y. ; Gran, R. ; Hara, T. ; Hasegawa, M. ; Hasegawa, T. ; Hayashi, K. ; 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. ; Joo, K. K. ; Jung, C. K. ; Kajita, T. ; Kameda, J. ; Kaneyuki, K. ; Kato, I. ; Kearns, E. ; Kibayashi, A. ; Kielczewska, D. ; Kim, B. J. ; Kim, C. O. ; Kim, J. Y. ; Kim, S. B. ; Kobayashi, K. ; Kobayashi, T. ; Koshio, Yusuke ; Kropp, W. R. ; Learned, J. G. ; Lim, S. H. ; Lim, I. T. ; Maesaka, H. ; Maruyama, T. ; Matsuno, S. ; Mauger, C. ; Mcgrew, C. ; Minamino, A. ; Mine, S. ; Miura, M. ; Miyano, K. ; Morita, T. ; Moriyama, S. ; Nakahata, M. ; Nakamura, K. ; Nakano, I. ; Nakata, F. ; Nakaya, T. ; Nakayama, S. ; Namba, T. ; Nambu, R. ; Nishikawa, K. ; Nishiyama, S. ; Noda, S. ; Obayashi, Y. ; Okada, A. ; Oyama, Y. ; Pac, M. Y. ; Park, H. ; Saji, C. ; Sakuda, Makoto ; Sarrat, A. ; Sasaki, T. ; Sasao, Noboru ; Scholberg, K. ; Sekiguchi, M. ; Sharkey, E. ; Shiozawa, M. ; Shiraishi, K. K. ; Smy, M. ; Sobel, H. W. ; Stone, J. L. ; Suga, Y. ; Sulak, L. R. ; Suzuki, A. ; Suzuki, Y. ; Takeuchi, Y. ; Tamura, N. ; Tanaka, M. ; Totsuka, Y. ; Ueda, S. ; Vagins, M. R. ; Walter, C. W. ; Wang, W. ; Wilkes, R. J. ; Yamada, S. ; Yamamoto, S. ; Yanagisawa, C. ; Yokoyama, H. ; Yoo, J. ; Yoshida, M. ; Zalipska, J. / Search for electron neutrino appearance in a 250 km long-baseline experiment. In: Physical Review Letters. 2004 ; Vol. 93, No. 5.
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TY - JOUR

T1 - Search for electron neutrino appearance in a 250 km long-baseline experiment

AU - Ahn, M. H.

AU - Aoki, S.

AU - Ashie, Y.

AU - Bhang, H.

AU - Boyd, S.

AU - Casper, D.

AU - Choi, J. H.

AU - Fukuda, S.

AU - Fukuda, Y.

AU - Gran, R.

AU - Hara, T.

AU - Hasegawa, M.

AU - Hasegawa, T.

AU - Hayashi, K.

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 - Joo, K. K.

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 - Kim, B. J.

AU - Kim, C. O.

AU - Kim, J. Y.

AU - Kim, S. B.

AU - Kobayashi, K.

AU - Kobayashi, T.

AU - Koshio, Yusuke

AU - Kropp, W. R.

AU - Learned, J. G.

AU - Lim, S. H.

AU - Lim, I. T.

AU - Maesaka, H.

AU - Maruyama, T.

AU - Matsuno, S.

AU - Mauger, C.

AU - Mcgrew, C.

AU - Minamino, A.

AU - Mine, S.

AU - Miura, M.

AU - Miyano, K.

AU - Morita, T.

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 - Nambu, R.

AU - Nishikawa, K.

AU - Nishiyama, S.

AU - Noda, S.

AU - Obayashi, Y.

AU - Okada, A.

AU - Oyama, Y.

AU - Pac, M. Y.

AU - Park, H.

AU - Saji, C.

AU - Sakuda, Makoto

AU - Sarrat, A.

AU - Sasaki, T.

AU - Sasao, Noboru

AU - Scholberg, K.

AU - Sekiguchi, M.

AU - Sharkey, E.

AU - Shiozawa, M.

AU - Shiraishi, K. K.

AU - Smy, M.

AU - Sobel, H. W.

AU - Stone, J. L.

AU - Suga, Y.

AU - Sulak, L. R.

AU - Suzuki, A.

AU - Suzuki, Y.

AU - Takeuchi, Y.

AU - Tamura, N.

AU - Tanaka, M.

AU - Totsuka, Y.

AU - Ueda, S.

AU - Vagins, M. R.

AU - Walter, C. W.

AU - Wang, 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 - 2004/7/30

Y1 - 2004/7/30

N2 - The search for electron neutrino appearance from accelerator-produced muon neutrinos in the K2K 250 km long-baseline neutrino experiment was described. It was observed that one electron event was found in the data corresponding to an exposure of 4.8 × 1019 protons on target. The number of expected background neutrino events in the absence of neutrino oscillations was found to be 2.4±0.6 events and was found to be dominated by misidentification of events from neutral current production. The probability density function of the expected number of electron events was evaluated from the the Poisson distribution, which was convoluted with systematic uncertainty.

AB - The search for electron neutrino appearance from accelerator-produced muon neutrinos in the K2K 250 km long-baseline neutrino experiment was described. It was observed that one electron event was found in the data corresponding to an exposure of 4.8 × 1019 protons on target. The number of expected background neutrino events in the absence of neutrino oscillations was found to be 2.4±0.6 events and was found to be dominated by misidentification of events from neutral current production. The probability density function of the expected number of electron events was evaluated from the the Poisson distribution, which was convoluted with systematic uncertainty.

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U2 - 10.1103/PhysRevLett.93.051801

DO - 10.1103/PhysRevLett.93.051801

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VL - 93

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

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