Department of Physics, University of Jyväskylä, Finland  Institut für Teilchenphysik, ETHZ, CH-8093 Zürich, Switzerland  Institute for Nuclear Research, Russian Academy of Sciences, Moscow, 117312 Russia  DAPNIA/SPP CEA-Saclay 91191 Gif-sur-Yvette cedex and APC, Paris   Dpto Fisica Teorica y del Cosmos & C.A.F.P.E., Universidad de Granada, Spain  Centre de Physique des Particules de Marseille (CPPM), IN2P3-CBRS et Université d’Aix-Marseille II, 163 Av. de Luminy, B.P. 902, 13288 Marseille Cedex 09, France  Laboratoire de l’Accélérateur Linéaire (LAL), IN2P3-CNRS et Université PARIS-SUD 11, Centre Scientifique d’Orsay, B.P. 34, 91898 ORSAY Cedex, France  CEA - Saclay, 91191 Gif sur Yvette Cedex, France  Astroparticule et Cosmologie (APC), UMR 7164 (CNRS, Universiti Paris VII, CEA, Observatoire de Paris), 11 pl. Marcelin Berthelot, 75231 Paris Cedex 05, France  Laboratoire de Physique Nucléaire et des Hautes Energies (LPNHE), IN2P3-CNRS et Universités Paris VI et Paris VII, 4 place Jussieu, Tr. 33 - RdC, 75252 Paris Cedex 05, France  Universität Hamburg, Institut für Experimentalphysik, Geb. 67/216, Luruper Chaussee 149, 22761 Hamburg, Germany  CUPP, University of Oulu, Finland  Laboratory for High Energy Physics, University of Bern, Sidlerstrasse, 5, CH-3012 Bern, Switzerland  Technical University Munich, Physikdepartment E15, James-Franck-Str 1, 85748 Garching, Germany  Technical University Munich, Physikdepartment E15, James-Franck-Str 1, 85748 Garching, Germany  Unknown  Institut für Teilchenphysik, ETHZ, CH-8093 Zürich, Switzerland  Universität Hamburg, Institut für Experimentalphysik, Geb. 67/216, Luruper Chaussee 149, 22761 Hamburg, Germany  Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München, Germany  Institute of Physics, University of Silesia, Uniwersytecka 4, PL-40007 Katowice, Poland  Institute of Physics, University of Silesia, Uniwersytecka 4, PL-40007 Katowice, Poland  Institut für Teilchenphysik, ETHZ, CH-8093 Zürich, Switzerland  Laboratory for High Energy Physics, University of Bern, Sidlerstrasse, 5, CH-3012 Bern, Switzerland  Particle Physics and Particle Astrophysics, Department of Physics and Astronomy, University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, UK  CUPP, University of Oulu, Finland  Unknown  Institut für Teilchenphysik, ETHZ, CH-8093 Zürich, Switzerland  Astroparticule et Cosmologie (APC), UMR 7164 (CNRS, Universiti Paris VII, CEA, Observatoire de Paris), 11 pl. Marcelin Berthelot, 75231 Paris Cedex 05, France   Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany   University of Jyväskylä, Finland   Institut für Teilchenphysik, ETHZ, CH-8093 Zürich, Switzerland  Technical University Munich, Physikdepartment E15, James-Franck-Str 1, 85748 Garching, Germany  Institut für Teilchenphysik, ETHZ, CH-8093 Zürich, Switzerland  Laboratory for High Energy Physics, University of Bern, Sidlerstrasse, 5, CH-3012 Bern, Switzerland  INFN-Univ. di Padova, Dept. di Fisica, via Marzolo 8, 35100 Padua, Italy  Unknown  Laboratory for High Energy Physics, University of Bern, Sidlerstrasse, 5, CH-3012 Bern, Switzerland  Institut für Teilchenphysik, ETHZ, CH-8093 Zürich, Switzerland  Institut für Teilchenphysik, ETHZ, CH-8093 Zürich, Switzerland  Technical University Munich, Physikdepartment E15, James-Franck-Str 1, 85748 Garching, Germany  Institut für Teilchenphysik, ETHZ, CH-8093 Zürich, Switzerland  Astroparticule et Cosmologie (APC), UMR 7164 (CNRS, Universiti Paris VII, CEA, Observatoire de Paris), 11 pl. Marcelin Berthelot, 75231 Paris Cedex 05, France   CUPP, University of Oulu, Finland  Technical University Munich, Physikdepartment E15, James-Franck-Str 1, 85748 Garching, Germany  Laboratory for High Energy Physics, University of Bern, Sidlerstrasse, 5, CH-3012 Bern, Switzerland  Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München, Germany  Department of Physical Sciences, University of Helsinki, Finland  Laboratory for High Energy Physics, University of Bern, Sidlerstrasse, 5, CH-3012 Bern, Switzerland  Institut für Teilchenphysik, ETHZ, CH-8093 Zürich, Switzerland  Laboratory for High Energy Physics, University of Bern, Sidlerstrasse, 5, CH-3012 Bern, Switzerland  Particle Physics and Particle Astrophysics, Department of Physics and Astronomy, University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, UK  Astroparticule et Cosmologie (APC), UMR 7164 (CNRS, Universiti Paris VII, CEA, Observatoire de Paris), 11 pl. Marcelin Berthelot, 75231 Paris Cedex 05, France  Department of Physics, University of Jyväskylä, Finland  Institut für Teilchenphysik, ETHZ, CH-8093 Zürich, Switzerland  Institut de Physique Nucleaire d’Orsay (IPNO), Groupe de Physique Theorique, Universite de Paris-Sud XI, Bat 100, rue Georges Clemenceau, 91406 Orsay, Cedex, France  Technical University Munich, Physikdepartment E15, James-Franck-Str 1, 85748 Garching, Germany  Technical University Munich, Physikdepartment E15, James-Franck-Str 1, 85748 Garching, Germany  Unknown  Universität Hamburg, Institut für Experimentalphysik, Geb. 67/216, Luruper Chaussee 149, 22761 Hamburg, Germany  

 R. Zimmermann