1. Department of Experimental Physics, CERN, Geneva, Switzerland
2. Institut für Kernphysik, University of Münster, Münster, Germany
3. INFN Sezione di Trieste, Trieste, Italy
4. Department of Physics, Università degli Studi di Cagliari, Cagliari, Italy
5. Physikalisches Institut, Universität Heidelberg, Heidelberg, Germany
6. Department of Physics, Università di Torino, Torino, Italy
7. Advanced Quantum Architecture Laboratory (AQUA), École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
8. Physics Department, Stanford University, Stanford, CA, USA
9. Czech Academy of Sciences, Nuclear Physics Institute, Řež, Czech Republic
10. Nikhef National Institute of Subatomic Physics, Amsterdam, XG, The Netherlands
11. Centre National de la Recherche Scientifique (CNRS), Strasbourg, France