[1] Tufts Univ, Dept Phys, Medford, MA 02155 USA
[2] Argonne Natl Lab, Argonne, IL 60439 USA
[3] Univ Athens, Dept Phys, GR-15771 Athens, Greece
[4] Benedictine Univ, Dept Phys, Lisle, IL 60532 USA
[5] Brookhaven Natl Lab, Upton, NY 11973 USA
[6] CALTECH, Lauritsen Lab, Pasadena, CA 91125 USA
[7] Univ Cambridge, Cavevdish Lab, Cambridge CB3 0HE, England
[8] Univ Estadual Campinas, BR-13083970 Campinas, SP, Brazil
[9] Univ Paris 07, APC, F-75205 Paris, France
[10] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA
[11] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA
[12] IIT, Chicago, IL 60616 USA
[13] Indiana Univ, Bloomington, IN 47405 USA
[14] Inst High Energy Phys, RU-140284 Moscow, Russia
[15] Inst Theoret & Expt Phys, High Energy Expt Phys Dept, Moscow 117218, Russia
[16] James Madison Univ, Dept Phys, Harrisonburg, VA 22807 USA
[17] PN Lebedev Phys Inst, Dept Nucl Phys, Moscow 117924, Russia
[18] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[19] UCL, Dept Phys & Astron, London WC1E 6BT, England
[20] Univ Minnesota, Minneapolis, MN 55455 USA
[21] Univ Minnesota, Dept Phys, Duluth, MN 55812 USA
[22] Univ Oxford, Subdept Particle Phys, Oxford OX1 3RH, England
[23] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA
[24] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England
[25] Univ Sao Paulo, Inst Fis, BR-05315 Sao Paulo, Brazil
[26] Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA
[27] Stanford Univ, Dept Phys, Stanford, CA 94305 USA
[28] Univ Sussex, Dept Phys & Astron, Brighton BN1 9QH, E Sussex, England
[29] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA
[30] Univ Texas, Dept Phys, Austin, TX 78712 USA
[31] Tufts Univ, Dept Phys, Medford, MA 02155 USA
[32] Western Washington Univ, Dept Phys, Bellingham, WA 98225 USA
[33] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA
[34] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA