[1] FCUL, IST, LIP, PT-1000 Lisbon, Portugal
[2] Iowa State Univ Sci & Technol, Dept Phys & Astron, Ames, IA 50011 USA
[3] Univ Instelling Antwerp, Dept Phys, BE-2610 Antwerp, Belgium
[4] ULB VUB, IIHE, BE-1050 Brussels, Belgium
[5] Univ Mons, Fac Sci, BE-7000 Mons, Belgium
[6] Univ Athens, Phys Lab, GR-10680 Athens, Greece
[7] Univ Bergen, Dept Phys, NO-5007 Bergen, Norway
[8] Univ Bologna, Dipartimento Fis, IT-40126 Bologna, Italy
[9] INFN, IT-40126 Bologna, Italy
[10] Ctr Brasileiro Pesquisas Fis, BR-22290 Rio De Janeiro, Brazil
[11] Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22453 Rio De Janeiro, Brazil
[12] Univ Estado Rio De Janeiro, Inst Fis, Rio De Janeiro, Brazil
[13] Comenius Univ, Fac Math & Phys, SK-84215 Bratislava, Slovakia
[14] Coll France, IN2P3, CNRS, Phys Corpusculaire Lab, FR-75231 Paris 05, France
[15] CERN, CH-1211 Geneva 23, Switzerland
[16] ULP, CNRS, IN2P3, Inst Rech Subatom, FR-67037 Strasbourg, France
[17] NCSR Demokritos, Inst Nucl Phys, GR-15310 Athens, Greece
[18] CAS High Energy Phys Div, Inst Phys, FZU, CZ-18040 Prague 8, Czech Republic
[19] Univ Genoa, Dipartimento Fis, IT-16146 Genoa, Italy
[20] INFN, IT-16146 Genoa, Italy
[21] Univ Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, FR-38026 Grenoble, France
[22] Helsinki Inst Phys, FI-00014 Helsinki, Finland
[23] Joint Inst Nucl Res Dubna, RU-101000 Moscow, Russia
[24] Universitat Karlsruhe, Inst Expt Kernphys, DE-76128 Karlsruhe, Germany
[25] Inst Nucl Phys, PL-30055 Krakow, Poland
[26] Univ Min & Met Krakow, PL-30055 Krakow, Poland
[27] Univ Paris 11, CNRS, IN2P3, Lab Accelerateur Lineaire, FR-91405 Orsay, France
[28] Univ Lancaster, Sch Phys & Chem, Lancaster LA1 4YB, England
[29] FCUL, IST, LIP, PT-1000 Lisbon, Portugal
[30] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England
[31] Univ Paris 06&7, CNRS, IN2P3, LPNHE, FR-75252 Paris 05, France
[32] Lund Univ, Dept Phys, SE-22363 Lund, Sweden
[33] Univ Claude Bernard, IPNL, IN2P3, CNRS, FR-69622 Villeurbanne, France
[34] Univ Aix Marseille 2, CPP, IN2P3, CNRS, FR-13288 Marseille 09, France
[35] Univ Milan, Dipartimento Fis, IT-20133 Milan, Italy
[36] INFN, IT-20133 Milan, Italy
[37] Niels Bohr Inst, DK-2100 Copenhagen O, Denmark
[38] Charles Univ Prague, Nucl Ctr MFF, NC, Area MFF, CZ-18000 Prague 8, Czech Republic
[39] NIKHEF H, NL-1009 DB Amsterdam, Netherlands
[40] Natl Tech Univ Athens, Dept Phys, GR-15773 Athens, Greece
[41] Univ Oslo, Dept Phys, NO-1000 Oslo 3, Norway
[42] Univ Oviedo, Dipartimento Fis, ES-33007 Oviedo, Spain
[43] Univ Oxford, Dept Phys, Oxford OX1 3RH, England
[44] Univ Padua, Dipartimento Fis, IT-35131 Padua, Italy
[45] INFN, IT-35131 Padua, Italy
[46] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
[47] Univ Roma Tor Vergata, Dipartimento Fis, IT-00173 Rome, Italy
[48] INFN, IT-00173 Rome, Italy
[49] CEA Saclay, Serv Phys Particules, DAPNIA, FR-91191 Gif Sur Yvette, France
[50] INFN, Ist Super Sanita, IT-00161 Rome, Italy