Detection of accelerator-produced neutrinos at a distance of 250 km

Authors
Ahn, SH An, S Aoki, A Berns, HG Bhang, HC Boyd, S Casper, D Chikamatsu, T Choi, JH Echigo, S Etoh, M Fujii, K Fukuda, S Fukuda, Y Gajewski, W Golebiewska, U Hara, T Hasegawa, T Hayato, Y Hill, J Hong, SJ Ieiri, M Inada, T Inagaki, T Ishida, T Ishii, H Ishii, T Ishino, H Ishitsuka, M Itow, Y Iwashita, T Jang, HI Jang, JS Jeon, EJ Jeong, EM Jung, CK Kadowaki, T Kajita, T Kameda, J Kaneyuki, K Kato, I Kato, Y Kearns, E Kenmochi, S Khang, BH Kibayashi, A Kielczewska, D Kim, BJ Kim, CO Kim, HI Kim, JH Kim, JY Kim, SB Kishi, S Kitamura, M Kobayashi, K Kobayashi, T Kobayashi, Y Kohama, M Koo, DG Koshio, Y Kropp, W Kume, G Kusano, E Learned, JG Lee, HK Lee, JW Lee, SB Lim, IT Lim, SH Maesaka, H Martens, K Maruyama, T Matsuno, S Mauger, C McGrew, C Minakawa, M Mine, S Miura, M Miyamoto, S Miyano, K Moriyama, S Mukai, S Nakahata, M Nakamura, K Nakamura, M Nakano, I Nakaya, T Nakayama, S Nakayoshi, K Nishijima, K Nishikawa, K Nishiyama, S Noda, S Noumi, H Obayashi, Y Oh, JK Okada, A Onchi, M Otaki, T Oyama, Y Pac, MY Park, H Park, SH Park, SK Sakai, A Sakuda, M Sakurai, N Sasao, N Sato, K Scholberg, K Seo, E Sharkey, E Shiino, K Shima, A Shiozawa, M So, H Sobel, H Stachyra, A Stone, JL Sulak, LR Suzuki, A Suzuki, Y Suzuki, Y Takasaki, M Takatsuki, M Takenaka, K Takeuchi, H Takeuchi, Y Tamura, N Tanaka, KH Tanaka, Y Tashiro, K Tauchi, K Toshito, T Totsuka, Y Tumakov, V Umeda, T Vagins, M Walter, CW Wilkes, RJ Yamada, S Yamaguchi, T Yamanoi, Y Yanagisawa, C Yokoyama, H Yokoyama, H Yoo, J Yoshida, M You, SY
Citation
Sh. Ahn et al., Detection of accelerator-produced neutrinos at a distance of 250 km, PHYS LETT B, 511(2-4), 2001, pp. 178-184
Citations number
39
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
0370-2693 → ACNP
Volume
511
Issue
2-4
Year of publication
2001
Pages
178 - 184
Database
ISI
SICI code
0370-2693(20010705)511:2-4<178:DOANAA>2.0.ZU;2-#
Abstract
The KEK to Kamioka long-baseline neutrino experiment (K2K) has begun its in vestigation of neutrino oscillations suggested by atmospheric neutrino obse rvations. Twenty-eight neutrino events have been detected in coincidence wi th the expected arrival time of the beam in the 22.5 kt fiducial volume of Super-Kamiokande, the far detector at 250 km distance. The expectation is 3 7.8(-3.8)(+3.5), derived using measurements of neutrino interactions in a n ear detector and extrapolation using a beam simulation validated by a measu rement of pion kinematics after production and focusing. The background is of order 10(-3) events. (C) 2001 Published by Elsevier Science B.V.