[1] Univ Tokyo, Inst Cosm Ray Res, Kamioka Observ, Kamioka, Akita, Japan
[2] Univ Tokyo, Inst Cosm Ray Res, Res Ctr Cosm Neutrinos, Kashiwa, Chiba, Japan
[3] Univ Autonoma Madrid, Dept Theoret Phys, Madrid, Spain
[4] Boston Univ, Dept Phys, Boston, MA USA
[5] British Columbia Inst Technol, Dept Phys, Burnaby, BC, Canada
[6] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA USA
[7] Calif State Univ Dominguez Hills, Dept Phys, Carson, CA USA
[8] Chonnam Natl Univ, Inst Universe & Elementary Particles, Gwangju, South Korea
[9] Duke Univ, Dept Phys, Durham, NC USA
[10] Ecole Polytech, IN2P3, CNRS, Lab Leprince Ringuet, Palaiseau, France
[11] Gifu Univ, Dept Phys, Gifu, Japan
[12] GIST Coll, Gwangju Inst Sci & Technol, Gwangju, South Korea
[13] Univ Glasgow, Sch Phys & Astron, Glasgow, Lanark, Scotland
[14] Univ Hawaii, Dept Phys & Astron, Honolulu, HI USA
[15] Inst Basic Sci IBS, Ctr Underground Phys, Daejeon, South Korea
[16] ICISE, Inst Interdisciplinary Res Sci & Educ IFIRSE, Quy Nhon, Vietnam
[17] Imperial Coll London, Dept Phys, London, England
[18] Ist Nazl Fis Nucl, Sez Bari, Bari, Italy
[19] Univ & Politecn Bari, Dipartimento Interuniv Fis, Bari, Italy
[20] Ist Nazl Fis Nucl, Sez Napoli, Naples, Italy
[21] Univ Napoli, Dipartimento Fis, Naples, Italy
[22] Ist Nazl Fis Nucl, Sez Padova, Padua, Italy
[23] Univ Padua, Dipartimento Fis, Padua, Italy
[24] Ist Nazl Fis Nucl, Sez Roma, Rome, Italy
[25] Univ Roma La Sapienza, Rome, Italy
[26] Univ Tokyo, CNRS, Int Res Lab, ILANCE, Kashiwa, Chiba, Japan
[27] Keio Univ, Dept Phys, Yokohama, Kanagawa, Japan
[28] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki, Japan
[29] Kings Coll London, Dept Phys, London, England
[30] Kobe Univ, Kobe, Hyogo, Japan
[31] Kyoto Univ, Dept Phys, Kyoto, Japan
[32] Univ Liverpool, Dept Phys, Liverpool, Merseyside, England
[33] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN USA
[34] Miyagi Univ Educ, Dept Phys, Sendai, Miyagi, Japan
[35] Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi, Japan
[36] Nagoya Univ, Kobayashi Maskawa Inst Origin Particles & Univers, Nagoya, Aichi, Japan
[37] Natl Ctr Nucl Res, Warsaw, Poland
[38] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY USA
[39] Okayama Univ, Dept Phys, Okayama, Japan
[40] Osaka Electrocommun Univ, Media Commun Ctr, Neyagawa, Osaka, Japan
[41] Univ Oxford, Dept Phys, Oxford, England
[42] Rutherford Appleton Lab, Oxford, England
[43] Seoul Natl Univ, Dept Phys, Seoul, South Korea
[44] Univ Sheffield, Sch Math & Phys Sci, Sheffield, S Yorkshire, England
[45] Shizuoka Univ Welf, Dept Informat Social Welf, Shizuoka, Japan
[46] Univ Silesia, Inst Phys, Katowice, Poland
[47] Rutherford Appleton Lab, STFC, Oxford, England
[48] Daresbury Lab, Warrington, Cheshire, England
[49] Sungkyunkwan Univ, Dept Phys, Suwon, South Korea
[50] Tohoku Univ, Fac Sci, Dept Phys, Sendai, Miyagi, Japan