1. Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
2. INFN Milano, via Celoria 16, 20133, Milano, Italy
3. Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences, Boltzmanngasse 3, 1090 Vienna, Austria
4. Department of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, 25123 Brescia, Italy
5. INFN Pavia, via Bassi 6, 27100 Pavia, Italy
6. Department of Physics, University of Trento, via Sommarive 14, 38123 Povo, Trento, Italy
7. TIFPA/INFN Trento, via Sommarive 14, 38123 Povo, Trento, Italy
8. Department of Science, University of Insubria, Via Valleggio 11, 22100 Como, Italy
9. Department of Physics, University of Genova, via Dodecaneso 33, 16146 Genova, Italy
10. INFN Genova, via Dodecaneso 33, 16146 Genova, Italy
11. Physics Department, CERN, 1211 Geneva 23, Switzerland
12. Department of Physics, University of Milano, via Celoria 16, 20133 Milano, Italy
13. Max Planck Institute for Nuclear Physics, Saupfercheckweg 1, 69117 Heidelberg, Germany
14. Laboratoire Aime Cotton, Université Paris-Sud, ENS Paris-Saclay, CNRS, Université Paris-Saclay,91405 Orsay Cedex, France
15. Kirchhoff-Institute for Physics, Heidelberg University, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany
16. Department of Physics, University of Oslo, Sem Slandsvei 24, 0371 Oslo, Norway
17. Institute of Nuclear Physics, CNRS/IN2p3, University of Lyon 1, 69622 Villeurbanne, France
18. INFN Padova, via Marzolo 8, 35131 Padova, Italy
19. Institute for Nuclear Research of the Russian Academy of Science, Moscow 117312, Russia
20. Joint Institute for Nuclear Research, 141980 Dubna, Russia
21. Czech Technical University, Prague, Brehov 7, 11519 Prague 1, Czech Republic
22. University of Bologna, Viale Berti Pichat 6/2, 40126 Bologna, Italy
23. Department of Physics, University of Pavia, via Bassi 6, 27100 Pavia, Italy
24. The Research Council of Norway, P.O. Box 564, NO-1327 Lysaker, Norway
25. Department of Physics, Heidelberg University, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany
26. Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, via Branze 43, 25123 Brescia, Italy