[1] Univ Tokyo, Kamioka Observ, Inst Cosm Ray Res, Kamioka, Gifu 5061205, Japan
[2] Univ Tokyo, Inst Cosm Ray Res, Res Ctr Cosm Neutrinos, Kashiwa, Chiba 2778582, Japan
[3] Univ Autonoma Madrid, Dept Theoret Phys, Madrid 28049, Spain
[4] Boston Univ, Dept Phys, Boston, MA 02215 USA
[5] British Columbia Inst Technol, Dept Phys, Burnaby, BC V5G 3H2, Canada
[6] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
[7] Calif State Univ, Dept Phys, Dominguez Hills, Carson, CA 90747 USA
[8] Chonnam Natl Univ, Inst Univ & Elementary Particles, Gwangju 61186, South Korea
[9] Duke Univ, Dept Phys, Durham, NC 27708 USA
[10] Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91120 Palaiseau, France
[11] Gifu Univ, Dept Phys, Gifu, Gifu 5011193, Japan
[12] Gwangju Inst Sci & Technol, GIST Coll, Gwangju 500712, South Korea
[13] Univ Glasgow, Sch Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland
[14] Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 USA
[15] Inst Basic Sci IBS, Ctr Underground Phys, Daejeon 34126, South Korea
[16] ICISE, Inst Interdisciplinary Res Sci & Educ, Quy Nhon 55121, Vietnam
[17] Imperial Coll London, Dept Phys, London SW7 2AZ, England
[18] INFN Sez Bari, Dipartimento Interuniv Fis, I-70125 Bari, Italy
[19] Univ Politecn Bari, I-70125 Bari, Italy
[20] INFN Sez Napoli, Dipartimento Fis, I-80126 Naples, Italy
[21] Univ Napoli, I-80126 Naples, Italy
[22] INFN, Dipartimento Fis, Sez Padova, I-35131 Padua, Italy
[23] Univ Padua, I-35131 Padua, Italy
[24] INFN, Sez Roma, I-00185 Rome, Italy
[25] Univ Roma La Sapienza, I-00185 Rome, Italy
[26] Univ Tokyo, CNRS, ILANCE, Int Res Lab, Kashiwa, Chiba 2778582, Japan
[27] Keio Univ, Dept Phys, Yokohama, Kanagawa 2238522, Japan
[28] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan
[29] Kings Coll London, Dept Phys, London WC2R 2LS, England
[30] Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan
[31] Kyoto Univ, Dept Phys, Kyoto, Kyoto 6068502, Japan
[32] Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England
[33] Miyagi Univ Educ, Dept Phys, Sendai, Miyagi 9800845, Japan
[34] Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi 4648602, Japan
[35] Nagoya Univ, Kobayashi Maskawa Inst Origin Particles Univ, Nagoya, Aichi 4648602, Japan
[36] Natl Ctr Nucl Res, PL-02093 Warsaw, Poland
[37] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA
[38] Okayama Univ, Dept Phys, Okayama, Okayama 7008530, Japan
[39] Osaka Electrocommun Univ, Media Commun Ctr, Neyagawa, Osaka 5728530, Japan
[40] Univ Oxford, Dept Phys, Oxford OX1 3PU, England
[41] Rutherford Appleton Lab, Oxford OX11 0QX, England
[42] Seoul Natl Univ, Dept Phys, Seoul 151742, South Korea
[43] Univ Sheffield, Dep Phys & Astron, Sheffield S3 7RH, S Yorkshire, England
[44] Shizuoka Univ Welf, Dept Informat Social Welf, Shizuoka 4258611, Japan
[45] Rutherford Appleton Lab, STFC, Oxford OX11 0QX, England
[46] Daresbury Lab, Warrington OX11 0QX, Cheshire, England
[47] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea
[48] Tohoku Univ, Dept Phys, Fac Sci, Sendai, Miyagi 9808578, Japan
[49] Tokai Univ, Dept Phys, Hiratsuka, Kanagawa 2591292, Japan
[50] Univ Tokyo, Dept Phys, Bunkyo, Tokyo 1130033, Japan