1. Physics Department, CERN, 1211 Geneva 23, Switzerland
2. INFN Milano, via Celoria 16, 20133, Milano, Italy
3. Department of Science, University of Insubria, Via Valleggio 11, 22100 Como, Italy
4. Institute for Nuclear Research of the Russian Academy of Science, Moscow 117312, Russia
5. Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, 25123 Brescia, Italy
6. INFN Pavia, via Bassi 6, 27100 Pavia, Italy
7. Department of Physics, University of Trento, via Sommarive 14, 38123 Povo, Trento, Italy
8. TIFPA/INFN Trento, via Sommarive 14, 38123 Povo, Trento, Italy
9. Department of Physics, University of Milano, via Celoria 16, 20133 Milano, Italy
10. Laboratoire Aimé Cotton, Université Paris-Sud, ENS Cachan, CNRS, Université Paris-Saclay, 91405 Orsay Cedex, France
11. Politecnico of Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
12. Kirchhoff-Institute for Physics, Heidelberg University, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany
13. Department of Physics, University of Genova, via Dodecaneso 33, 16146 Genova, Italy
14. INFN Genova, via Dodecaneso 33, 16146 Genova, Italy
15. Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences, Boltzmanngasse 3, 1090 Vienna, Austria
16. Joint Institute for Nuclear Research, 141980 Dubna, Russia
17. INFN Padova, via Marzolo 8, 35131 Padova, Italy
18. Institute of Nuclear Physics, CNRS/IN2p3, University of Lyon 1, 69622 Villeurbanne, France
19. Czech Technical University, Prague, Bøehová 7, 11519 Prague 1, Czech Republic
20. Department of Physics, University of Oslo, Semælands vei 24, 0371 Oslo, Norway
21. Department of Physics, University of Pavia, via Bassi 6, 27100 Pavia, Italy
22. Department of Civil Engineering, University of Brescia, via Branze 43, 25123 Brescia, Italy