Author affiliations
1 European Organization for Nuclear Research (CERN), CH-1211 Genève 23, Switzerland
2 IRFU, Centre d'Études Nucléaires de Saclay, Gif-sur-Yvette, France
3 University of Patras, Patras, Greece
4 Technische Universität Darmstadt, Institut für Kernphysik, Schlossgartenstrasse 9, 64289 Darmstadt, Germany
5 Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, Germany
6 Instituto de Física Nuclear y Altas Energías, Universidad de Zaragoza, Zaragoza, Spain
7 Enrico Fermi Institute and KICP, University of Chicago, Chicago, IL, U.S.A.
8 Aristotle University of Thessaloniki, Thessaloniki, Greece
9 National Center for Scientific Research ``Demokritos'', Athens, Greece
10 Albert-Ludwigs-Universität Freiburg, Freiburg, Germany
11 Institute for Nuclear Research, Russian Academy of Sciences, Moscow, Russia
12 Department of Physics and Astronomy, University of British Columbia, Vancouver, Canada
13 Johann Wolfgang Goethe-Universität, Institut für Angewandte Physik, Frankfurt am Main, Germany
14 Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München, Germany
15 Rudjer Bošković Institute, Bijenička cesta 54, P.O.Box 180, HR-10002 Zagreb, Croatia
16 Present address: Inst. de Physique Nucléaire, Lyon, France
17 Present address: Department of Physics, University of Alberta, Edmonton, T6G2G7, Canada
18 Present address: Instituto de Física Nuclear y Altas Energías, Universidad de Zaragoza, Zaragoza, Spain
19 Present address: Scuola Normale Superiore, Pisa, Italy
20 Present address: Stanford University and SLAC National Accelerator Laboratory, Stanford, CA, U.S.A.
21 Permanent address: Brookhaven National Laboratory, NY, U.S.A.
