[1] CERN, Div EP, CH-1211 Geneva 23, Switzerland
[2] Joint Nucl Res Inst, Dubna 141980, Russia
[3] Max Planck Inst Phys, D-80805 Munich, Germany
[4] Gesell Schwerionenforsch, GSI, Darmstadt, Germany
[5] KFKI, Res Inst Particle & Nucl Phys, Budapest, Hungary
[6] Univ Birmingham, Birmingham, W Midlands, England
[7] Inst Nucl Phys, Krakow, Poland
[8] Univ Calif Los Angeles, Los Angeles, CA USA
[9] Inst Nucl Studies, PL-00681 Warsaw, Poland
[10] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA
[11] Univ Frankfurt, Fachbereich Phys, D-6000 Frankfurt, Germany
[12] Comenius Univ, Bratislava 81806, Slovakia
[13] Univ Calif Davis, Davis, CA 95616 USA
[14] Univ Washington, Nucl Phys Lab, Seattle, WA 98195 USA
[15] Univ Marburg, Fachbereich Phys, D-3550 Marburg, Germany
[16] Univ Houston, Houston, TX USA
[17] Univ Warsaw, Inst Expt Phys, Warsaw, Poland
[18] Yale Univ, New Haven, CT USA
[19] Rudjer Boskovic Inst, Zagreb, Croatia
[20] Univ Athens, Dept Phys, Athens, Greece