Author affiliations
1 Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan
2 Current address: Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
3 Department of Physics, Boston University, Boston, MA 02215
4 Physics Department, Brookhaven National Laboratory, Upton, NY 11973
5 Department of Physics and Astronomy, University of California, Irvine, Irvine, CA 92697-4575
6 Department of Physics, California State University, Dominguez Hills, Carson, CA 90747
7 Department of Physics, George Mason University, Fairfax, VA 22030
8 Department of Physics, Gifu University, Gifu, Gifu 501-1193, Japan
9 Department of Physics and Astronomy, University of Hawaii, Honolulu, HI 96822
10 Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
11 Current address: Enrico Fermi Institute, University of Chicago, Chicago, IL 60637
12 Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
13 Department of Physics, Kobe University, Kobe, Hyogo 657-8501, Japan
14 Current address: The Institute of Physical and Chemical research (RIKEN), Wako, Saitama 351-0198, Japan
15 Department of Physics, Kyoto University, Kyoto 606-8502, Japan
16 Current address: The Institute of Physical and Chemical research (RIKEN), Harima Institue, Sayo, Hyogo 679-5300, Japan
17 Physics Division, P-23, Los Alamos National Laboratory, Los Alamos, NM 87544
18 Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803
19 Department of Physics, University of Maryland, College Park, MD 20742
20 Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139
21 Department of Physics, University of Minnesota, Duluth, MN 55812-2496
22 Department of Physics and Astronomy, State University of New York, Stony Brook, NY 11794
23 Current address: Department of Physics, University of Utah, Salt Lake City, UT 84112
24 Department of Physics, Niigata University, Niigata, Niigata 950-2181, Japan
25 Department of Physics, Seoul National University, Seoul 151-742, Korea
26 International and Cultural Studies, Shizuoka Seika College, Yaizu, Shizuoka, 425-8611, Japan
27 Department of Systems Engineering, Shizuoka University, Hamamatsu, Shizuoka 432-8561, Japan
28 Research Center for Neutrino Science, Tohoku University, Sendai, Miyagi 980-8578, Japan
29 The University of Tokyo, Tokyo 113-0033, Japan
30 Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
31 Department of Physics, Tokyo Institute for Technology, Meguro, Tokyo 152-8551, Japan
32 Institute of Experimental Physics, Warsaw University, 00-681 Warsaw, Poland
33 Department of Physics, University of Washington, Seattle, WA 98195-1560
