[1] SUNY Albany, Albany, NY 12222 USA
[2] Lawrence Berkeley Natl Lab, Berkeley, CA USA
[3] Univ Calif Berkeley, Berkeley, CA 94720 USA
[4] Univ Bonn, Inst Phys, D-5300 Bonn, Germany
[5] Univ Dortmund, Inst Phys, D-4600 Dortmund, Germany
[6] Dipartimento Fis, I-16146 Genoa, Italy
[7] INFM, Genoa, Italy
[8] Ctr Phys Particules Marseille, Marseille, France
[9] Dipartimento Fis, Milan, Italy
[10] INFM, Milan, Italy
[11] Max Planck Inst Phys, D-80805 Munich, Germany
[12] Univ Oklahoma, Dept Phys & Astron, Norman, OK 73019 USA
[13] Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic
[14] Univ Siegen, Fachbereich Phys, D-5900 Siegen, Germany
[15] Dept Fis, Udine, Italy
[16] Ist Nazl Fis Nucl, Udine, Italy
[17] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
[18] Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany
[19] CERN, CH-1211 Geneva 23, Switzerland