[1] Univ Bologna, I-40126 Bologna, Italy
[2] INFI, Sez Bologna, I-40126 Bologna, Italy
[3] CIEMAT, Ctr Invest Energet Medioambientales & Tecnol, E-28040 Madrid, Spain
[4] Univ Perugia, I-06100 Perugia, Italy
[5] Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy
[6] Univ Geneva, CH-1211 Geneva 4, Switzerland
[7] Swiss Fed Inst Technol, CH-8093 Zurich, Switzerland
[8] Chinese Acad Launching Vehivle Technol, CALT, Beijing 100076, Peoples R China
[9] Inst Theoret & Expt Phys, Moscow 117259, Russia
[10] MIT, Cambridge, MA 02139 USA
[11] Inst Nucl Sci, F-38026 Grenoble, France
[12] LIP, Lab Instrumentacao & Fis Expt Particulas, P-1000 Lisbon, Portugal
[13] Inst Super Tecn, P-1096 Lisbon, Portugal
[14] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy
[15] Rhein Westfal TH Aachen, Inst Phys 3, D-52056 Aachen, Germany
[16] CNR, IROE, I-50125 Florence, Italy
[17] Natl Cent Univ, Chungli 32054, Taiwan
[18] Chinese Univ Sci & Technol, USTC, Hefei 230029, Anhui, Peoples R China
[19] Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China
[20] IV Kurchatov Atom Energy Inst, Moscow 123182, Russia
[21] Acad Sinica, Taipei 11529, Taiwan
[22] LIP, Lab Instrumentacao & Fis Expt Particulas, P-3000 Coimbra, Portugal
[23] Chinese Acad Sci, IEE, Inst Elect Engn, Beijing 100080, Peoples R China
[24] Aalto Univ, FIN-02540 Kylmala, Finland
[25] Univ Turku, FIN-20014 Turku, Finland
[26] Lab Annecy Le Vieux Phys Particules, LAPP, F-74941 Annecy Le Vieux, France
[27] Rhein Westfal TH Aachen, Inst Phys 1, D-52056 Aachen, Germany
[28] Kyungpook Natl Univ, Taegu 702701, South Korea
[29] Chung Shan Inst Sci & Technol, Tao Yuan 325, Taiwan
[30] Louisiana State Univ, Baton Rouge, LA 70803 USA
[31] Univ Politehn Bucuresti, Inst Microtechnol, R-76900 Bucharest, Romania
[32] Univ Bucharest, HEPPG, R-76900 Bucharest, Romania
[33] Johns Hopkins Univ, Baltimore, MD 21218 USA
[34] Univ Maryland, College Pk, MD 20742 USA
[35] Max Planck Inst Extraterr Phys, D-85740 Garching, Germany
[36] Chinese Acad Sci, Ctr Space Sci & Applicat, Beijing 100080, Peoples R China
[37] Russian Acad Sci, Inst Nucl Phys, St Petersburg, Russia