[1] Iowa State Univ, Dept Phys, Ames, IA 50011 USA
[2] Iowa State Univ, Ames Lab, Ames, IA 50011 USA
[3] Univ Instelling Antwerp, Dept Phys, B-2610 Wilrijk, BELGIUM
[4] ULB VUB, IIHE, B-1050 Brussels, BELGIUM
[5] Univ Etat Mons, Serv Phys Part Elem, Fac Sci, B-7000 Mons, BELGIUM
[6] Univ Athens, Phys Lab, GR-10680 Athens, GREECE
[7] Univ Bergen, Dept Phys, N-5007 Bergen, NORWAY
[8] Univ Bologna, Dipartimento Fis, I-40126 Bologna, ITALY
[9] Ist Nazl Fis Nucl, I-40126 Bologna, ITALY
[10] Coll France, Lab Phys corpusculaire, F-75231 Paris 05, FRANCE
[11] CERN, CH-1211 Geneva 23, SWITZERLAND
[12] Grp DELPHI, CRN, Div Hautes Energies, F-67037 Strasbourg, FRANCE
[13] Grp LEPSI, CRN, Div Hautes Energies, F-67037 Strasbourg, FRANCE
[14] Greek Atom Energy Commiss, Nucl Res Ctr Demokritos, GR-15310 Aghia Paraskevi, GREECE
[15] Ist Nazl Fis Nucl, I-16146 Genoa, ITALY
[16] Univ Helsinki, Dept High Energy Phys, SF-00170 Helsinki 17, FINLAND
[17] Joint Inst Nucl Res Dubna, Moscow 1101000, RUSSIA
[18] Univ Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe 1, GERMANY
[19] Inst Nucl Phys, High Energy Phys Lab, PL-30055 Krakow 30, POLAND
[20] Univ Paris Sud, Lab Accelerateur Lineaire, F-91405 Orsay, FRANCE
[21] LIP, P-1000 Lisbon, PORTUGAL
[22] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, ENGLAND
[23] Univ Paris 06, LPNHE, F-75230 Paris 05, FRANCE
[24] Univ Paris 07, LPNHE, F-75230 Paris 05, FRANCE
[25] Univ Lund, Dept Phys, S-22363 Lund, SWEDEN
[26] Univ Milan, Dipartimento Fis, I-20133 Milan, ITALY
[27] Niels Bohr Inst, DK-2100 Copenhagen, DENMARK
[28] NIKHEF H, NL-1009 DB Amsterdam, NETHERLANDS
[29] Natl Tech Univ, Dept Phys, GR-15773 Athens, GREECE
[30] Univ Oslo, Dept Phys, N-1000 Oslo 3, NORWAY
[31] Univ Oxford, Nucl Phys Lab, Oxford OX1 3RH, ENGLAND
[32] Univ Padua, Dipartimento Fis, I-35131 Padua, ITALY
[33] Ist Nazl Fis Nucl, I-35131 Padua, ITALY
[34] Rutherford Appleton Lab, Chilton OX11 OQX, ENGLAND
[35] CEN Saclay, DPhPE, F-91191 Gif Sur Yvette, FRANCE
[36] Ist Nazl Fis Nucl, Ist Super Sanita, I-00161 Rome, ITALY
[37] Univ Rome 2, Dipartimento Fis, I-00173 Rome, ITALY
[38] Ist Nazl Fis Nucl, I-00173 Rome, ITALY
[39] Univ Santander, Fac Ciencias, E-39005 Santander, SPAIN
[40] Inst High Energy Phys, Protvino, RUSSIA
[41] Univ Stockholm, Inst Phys, S-11346 Stockholm, SWEDEN
[42] Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, ITALY
[43] Ist Nazl Fis Nucl, I-10125 Turin, ITALY
[44] Univ Trieste, Dipartimento Fis, I-34127 Trieste, ITALY
[45] Ist Nazl Fis Nucl, I-34127 Trieste, ITALY
[46] Univ Udine, Ist Fis, I-33100 Udine, ITALY
[47] Univ Uppsala, Dept Radiat Sci, S-75121 Uppsala, SWEDEN
[48] Ctr Mixto Univ Valencia CSIC, Inst Fis Corpuscular IFIC, E-46100 Burjassot, SPAIN
[49] Oesterreich Akad Wissensch, Inst Hochenergiephys, A-1050 Vienna, AUSTRIA
[50] Univ Warsaw, Inst Nucl Studies, PL-99681 Warsaw, POLAND