[1] Columbia Univ, Dept Phys, New York, NY 10027 USA
[2] Nikhef, Van Swinderen Inst, NL-9747 AG Groningen, Netherlands
[3] Univ Groningen, Van Swinderen Inst, NL-9747 AG Groningen, Netherlands
[4] Univ Tokyo, Kamioka Observ, Inst Cosm Ray Res, Hida, Gifu 5061205, Japan
[5] Univ Tokyo, Kavli Inst Phys & Math Universe WPI, Hida, Gifu 5061205, Japan
[6] Sorbonne Univ, CNRS, IN2P3, LPNHE, F-75005 Paris, France
[7] Univ Munster, Inst Kernphys, D-48149 Munster, Germany
[8] Univ Torino, INAF Astrophys Observ Torino, Dept Phys, I-10125 Turin, Italy
[9] INFN Torino, I-10125 Turin, Italy
[10] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67100 Laquila, Italy
[11] Ist Nazl Fis Nucl, Gran Sasso Sci Inst, I-67100 Laquila, Italy
[12] Univ Chicago, Dept Phys, Enrico Fermi Inst, Chicago, IL 60637 USA
[13] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA
[14] New York Univ Abu Dhabi, Ctr Astro Particle & Planetary Phys, Abu Dhabi, U Arab Emirates
[15] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland
[16] Univ Nantes, IMT Atlantique, SUBATECH, CNRS,IN2P3, F-44307 Nantes, France
[17] Univ Bologna, Dept Phys & Astron, I-40126 Bologna, Italy
[18] INFN Bologna, I-40126 Bologna, Italy
[19] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany
[20] Univ Freiburg, Inst Phys, D-79104 Freiburg, Germany
[21] Weizmann Inst Sci, Dept Particle Phys & Astrophys, IL-7610001 Rehovot, Israel
[22] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
[23] Tsinghua Univ, Ctr High Energy Phys, Beijing 100084, Peoples R China
[24] Univ Coimbra, Dept Phys, LIBPhys, P-3004516 Coimbra, Portugal
[25] Nikhef, Sci Pk, NL-1098 XG Amsterdam, Netherlands
[26] Univ Amsterdam, Sci Pk, NL-1098 XG Amsterdam, Netherlands
[27] Stockholm Univ, Dept Phys, Oskar Klein Ctr, AlbaNova, SE-10691 Stockholm, Sweden
[28] Johannes Gutenberg Univ Mainz, Inst Phy, D-55099 Mainz, Germany
[29] Johannes Gutenberg Univ Mainz, Exzellenzcluster PRISMA, D-55099 Mainz, Germany
[30] Univ Aquila, Dept Chem & Phys, I-67100 Laquila, Italy
[31] Karlsruhe Inst Technol, Inst Astroparticle Phys, D-76021 Karlsruhe, Germany
[32] Purdue Univ, Dept Phys & Astron, W Lafayette, IN 47907 USA
[33] Univ Napoli, Dept Phys Ettore Pancini, I-80126 Naples, Italy
[34] INFN Napoli, I-80126 Naples, Italy
[35] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA
[36] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
[37] Nagoya Univ, Kobayashi Maskawa Inst Origin Particles & Univers, Furo Cho,Chikusa Ku, Nagoya, Aichi 4648602, Japan
[38] Nagoya Univ, Inst Space Earth Environm Res, Furo Cho,Chikusa Ku, Nagoya, Aichi 4648602, Japan
[39] Westlake Univ, Sch Sci, Dept Phys, Hangzhou 310030, Peoples R China
[40] Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan
[41] INFN Ferrara, I-44122 Ferrara, Italy
[42] Univ Ferrara, Dipartimento Fis & Sci Terra, I-44122 Ferrara, Italy
[43] Chinese Univ Hong Kong Shenzhen, Sch Sci & Engn, Shenzhen 518172, Guangdong, Peoples R China
[44] INFN Roma Tre, I-00146 Rome, Italy
[45] Bucknell Univ, Dept Phys & Astron, Lewisburg, PA USA
[46] Coimbra Polytech ISEC, P-3030199 Coimbra, Portugal