Authors
Y Fukuda, T Hayakawa, E Ichihara, K Inoue, K Ishihara, Hirokazu Ishino, Y Itow, T Kajita, J Kameda, S Kasuga, K Kobayashi, Y Kobayashi, Yusuke Koshio, K Martens, M Miura, M Nakahata, S Nakayama, A Okada, M Oketa, K Okumura, M Ota, N Sakurai, M Shiozawa, Y Suzuki, Y Takeuchi, Y Totsuka, S Yamada, M Earl, A Habig, E Kearns, SB Kim, MD Messier, K Scholberg, JL Stone, LR Sulak, CW Walter, M Goldhaber, T Barszczak, W Gajewski, PG Halverson, J Hsu, WR Kropp, LR Price, F Reines, HW Sobel, MR Vagins, KS Ganezer, WE Keig, RW Ellsworth, S Tasaka, JW Flanagan, A Kibayashi, JG Learned, S Matsuno, V Stenger, D Takemori, T Ishii, J Kanzaki, T Kobayashi, K Nakamura, K Nishikawa, Y Oyama, A Sakai, Makoto Sakuda, O Sasaki, S Echigo, M Kohama, AT Suzuki, TJ Haines, E Blaufuss, R Sanford, R Svoboda, ML Chen, Z Conner, JA Goodman, GW Sullivan, M Mori, J Hill, CK Jung, C Mauger, C McGrew, E Sharkey, B Viren, C Yanagisawa, W Doki, T Ishizuka, Y Kitaguchi, H Koga, K Miyano, H Okazawa, C Saji, M Takahata, A Kusano, Y Nagashima, M Takita, T Yamaguchi, M Yoshida, M Etoh, K Fujita, A Hasegawa, T Hasegawa, S Hatakeyama, T Iwamoto, T Kinebuchi, M Koga, T Maruyama, H Ogawa, A Suzuki, F Tsushima, M Koshiba, M Nemoto, K Nishijima, T Futagami, Y Hayato, Y Kanaya, K Kaneyuki, Y Watanabe, D Kielczewska, R Doyle, J George, A Stachyra, L Wai, J Wilkes, K Young, Super-Kamiokande Collaboration
Publication date
1998/9/17
Journal
Physics Letters B
Volume
436
Issue
1-2
Pages
33-41
Publisher
North-Holland
Description
The flavor ratio of the atmospheric neutrino flux and its zenith angle dependence have been studied in the multi-GeV energy range using an exposure of 25.5 kiloton-years of the Super-Kamiokande detector. By comparing the data to a detailed Monte Carlo simulation, the ratio (μ/e)DATA/(μ/e)MC was measured to be 0.66±0.06(stat.)±0.08(sys.). In addition, a strong distortion in the shape of the μ-like event zenith angle distribution was observed. The ratio of the number of upward to downward μ-like events was found to be 0.52+0.07−0.06(stat.)±0.01(sys.), with an expected value of 0.98±0.03(stat.)±0.02(sys.), while the same ratio for the e-like events was consistent with unity.
Total citations
Scholar articles
Y Fukuda, T Hayakawa, E Ichihara, K Inoue, K Ishihara… - Physics Letters B, 1998