[1] Univ Bologna, Dipartmento Fis, I-40126 Bologna, Italy
[2] Ist Nazl Fis Nucl, I-40126 Bologna, Italy
[3] Univ Bonn, Inst Phys, D-53115 Bonn, Germany
[4] Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA
[5] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[6] Carleton Univ, Dept Phys, Ottawa Carleton Inst Phys, Ottawa, ON K1S 5B6, Canada
[7] CERN, European Org Nucl Res, CH-1211 Geneva 23, Switzerland
[8] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[9] Univ Chicago, Dept Phys, Chicago, IL 60637 USA
[10] Univ Freiburg, Fac Phys, D-79104 Freiburg, Germany
[11] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany
[12] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA
[13] Queen Mary Univ London, London E1 4NS, England
[14] Tech Hsch Aachen, Inst Phys 3, D-52056 Aachen, Germany
[15] UCL, London WC1E 6BT, England
[16] Univ Manchester, Schuster Lab, Sch Phys & Astron, Manchester M13 9PL, Lancs, England
[17] Univ Maryland, Dept Phys, College Pk, MD 20742 USA
[18] Univ Montreal, Phys Nucl Lab, Montreal, PQ H3C 3J7, Canada
[19] Univ Oregon, Dept Phys, Eugene, OR 97403 USA
[20] CCLRC Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
[21] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel
[22] Tel Aviv Univ, Dept Phys & Astron, IL-69978 Tel Aviv, Israel
[23] Univ Tokyo, Int Ctr Elementary Particle Phys, Tokyo 1130033, Japan
[24] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan
[25] Kobe Univ, Kobe, Hyogo 6578501, Japan
[26] Weizmann Inst Sci, Particle Phys Dept, IL-76100 Rehovot, Israel
[27] Univ Hamburg, DESY, Inst Expt Phys, D-22607 Hamburg, Germany
[28] Univ Victoria, Dept Phys, Victoria, BC V8W 3P6, Canada
[29] Univ British Columbia, Dept Phys, Vancouver, BC V6T 1Z1, Canada
[30] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada
[31] Res Inst Particle & Nucl Phys, H-1525 Budapest, Hungary
[32] Inst Nucl Res, H-4001 Debrecen, Hungary
[33] Univ Munich, Sekt Phys, D-85748 Garching, Germany
[34] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany
[35] Yale Univ, Dept Phys, New Haven, CT 06520 USA
[36] TRIUMF, Vancouver, BC V6T 2A3, Canada
[37] Univ Debrecen, Dept Expt Phys, Debrecen, Hungary
[38] MPI Munchen, Munich, Germany
[39] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki, Japan
[40] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England