1. Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow 119991, Russia
2. Faculty of Computational Mathematics and Cybernetics, Lomonosov Moscow State University, Moscow 119991, Russia
3. INFN, Sezione di Torino, Via Pietro Giuria, 1, 10125 Torino, Italy
4. Dipartimento di Fisica, Università di Torino, Via Pietro Giuria, 1, 10125 Torino, Italy
5. INAF, Osservatorio Astrofisico di Torino, Via Osservatorio 20, Pino Torinese, 10025 Torino, Italy
6. Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow 119991, Russia
7. INFN, Sezione di Roma Tor Vergata, Via della Ricerca Scientifica 1, 00133 Roma, Italy
8. RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
9. AstroParticule et Cosmologie, CNRS, Université Paris Cité, F-75013 Paris, France
10. Dipartimento di Fisica, Universita degli Studi di Roma Tor Vergata, Via della Ricerca Scientifica 1, 00133 Roma, Italy
11. Max Planck Institute for Physics, Föhringer Ring 6, D-80805 Munich, Germany
12. Department of Particle and Astroparticle Physics, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
13. Department of Astronomy and Astrophysics, The University of Chicago, Chicago, IL 60637, USA
14. INFN—Laboratori Nazionali di Frascati, 00044 Frascati, Italy
15. Department of Physics, Konan University, Kobe 658-8501, Japan
16. AstroParticule et Cosmologie, Institut Universitaire de France (IUF), CEDEX 05, 75231 Paris, France
17. Faculty of Physics, University of Warsaw, 02-093 Warsaw, Poland
18. National Centre for Nuclear Research, Ul. Pasteura 7, PL-02-093 Warsaw, Poland
19. Omega, Ecole Polytechnique, CNRS/IN2P3, 91128 Palaiseau, France
20. Department of Physics, Colorado School of Mines, Golden, CO 80401, USA