[1] UNIV AUTONOMA BARCELONA, INST FIS ALTES ENERGIES, E-08193 BARCELONA, SPAIN
[2] INFN, SEZ BARI, I-70126 BORI, ITALY
[3] UNIV BARI, DIPARTIMENTO FIS, I-70126 BARI, ITALY
[4] CHINESE ACAD SCI, INST HIGH ENERGY PHYS, BEIJING, PEOPLES R CHINA
[5] CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND
[6] UNIV CLERMONT FERRAND, PHYS CORPUSCULAIRE LAB, IN2P3, CNRS, F-63177 CLERMONT FERRAND, FRANCE
[7] NIELS BOHR INST, DK-2100 COPENHAGEN, DENMARK
[8] DEMOCRITOS NUCL RES CTR, GR-15310 ATHENS, GREECE
[9] ECOLE POLYTECH, PHYS NUCL & HAUTES ENERGIES LAB, IN2P3, CNRS, F-91128 PALAISEAU, FRANCE
[10] UNIV EDINBURGH, DEPT PHYS, EDINBURGH EH9 3JZ, MIDLOTHIAN, SCOTLAND
[11] UNIV FIRENZE, INFN, DIPARTIMENTO FIS, SEZ FIRENZE, I-50125 FLORENCE, ITALY
[12] FLORIDA STATE UNIV, SUPERCOMP COMPUTAT RES INST, TALLAHASSEE, FL 32306 USA
[13] FLORIDA STATE UNIV, DEPT PHYS, TALLAHASSEE, FL 32306 USA
[14] INFN, LAB NAZL, I-00044 FRASCATI, ITALY
[15] UNIV GLASGOW, DEPT PHYS & ASTRON, GLASGOW G12 8QQ, SCOTLAND
[16] UNIV HEIDELBERG, INST HOCHENERGIEPHYS, W-6900 HEIDELBERG, GERMANY
[17] UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED, DEPT PHYS, LONDON SW7 2BZ, ENGLAND
[18] UNIV INNSBRUCK, INST EXPTL PHYS, A-6020 INNSBRUCK, AUSTRIA
[19] UNIV LANCASTER, DEPT PHYS, LANCASTER LA1 4YB, ENGLAND
[20] UNIV MAINZ, INST PHYS, W-6500 MAINZ, GERMANY
[21] FAC SCI LUMINY, CTR PHYS PARTICULES, IN2P3, CNRS, F-13288 MARSEILLE, FRANCE
[22] MAX PLANCK INST PHYS & ASTROPHYS, WERNER HEISENBERG INST, W-8000 MUNICH, GERMANY
[23] UNIV PARIS 11, ACCELERATEUR LINEAIRE LAB, IN2P3, CNRS, F-91405 ORSAY, FRANCE
[24] UNIV PISA, INFN, DIPARTIMETNO FIS, SEZ PISA, I-56010 PISA, ITALY
[25] SCUOLA NORMALE SUPER PISA, I-56010 PISA, ITALY
[26] UNIV LONDON, ROYAL HOLLOWAY & BEDFORD NEW COLL, DEPT PHYS, SURREY TW20 0EX, ENGLAND
[27] RUTHERFORD APPLETON LAB, DEPT PARTICLE PHYS, DIDCOT OX11 0QX, OXON, ENGLAND
[28] CENS, DAPNIA, SERV PHYS PARTICULES, F-91191 GIF SUR YVETTE, FRANCE
[29] UNIV CALIF SANTA CRUZ, INST PARTICLE PHYS, SANTA CRUZ, CA 95064 USA
[30] UNIV SHEFFIELD, DEPT PHYS, SHEFFIELD S3 7RH, S YORKSHIRE, ENGLAND
[31] UNIV SIEGEN, FACHBEREICH PHYS, W-5900 SIEGEN, GERMANY
[32] INFN, SEZ TRIESTE, I-34127 TRIESTE, ITALY
[33] UNIV TRIESTE, DIPARTIMENTO FIS, I-34127 TRIESTE, ITALY
[34] UNIV WISCONSIN, DEPT PHYS, MADISON, WI 53706 USA
[35] UNIV WASHINGTON, SEATTLE, WA 98195 USA
[36] UNIV TURIN, IST FIS GEN, I-10124 TURIN, ITALY
[37] CNR, IST COSMO GEOFIS, TURIN, ITALY
[38] CERN, DIV PPE, CH-1211 GENEVA 23, SWITZERLAND
[39] UNIV NAPLES, DIPARTIMENTO SCI FIS, I-80138 NAPLES, ITALY
[40] UNIV SASSARI, IST MATEMAT & FIS, I-07100 SASSARI, ITALY