[1] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
[2] Univ Chinese Acad Sci, Dept Phys, Beijing 100864, Peoples R China
[3] McGill Univ, Phys Dept, Montreal, PQ H3A 2T8, Canada
[4] Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys ECAP, D-91058 Erlangen, Germany
[5] Pacific Northwest Natl Lab, Richland, WA 99352 USA
[6] Carleton Univ, Dept Phys, Ottawa, ON K1S 5B6, Canada
[7] King Abdulaziz City Sci & Technol, Riyadh 12354, Saudi Arabia
[8] Duke Univ, Dept Phys, Durham, NC 27708 USA
[9] Triangle Univ Nucl Lab TUNL, Durham, NC 27708 USA
[10] Univ Illinois, Dept Phys, Urbana, IL 61801 USA
[11] Kurchatov Inst, AI Alikhanov Natl Res Ctr, Inst Theoret & Expt Phys, Moscow 117218, Russia
[12] Univ South Dakota, Dept Phys, Vermillion, SD 57069 USA
[13] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA
[14] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[15] Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA
[16] TRIUMF, Vancouver, BC V6T 2A3, Canada
[17] Laurentian Univ, Dept Phys, Sudbury, ON P3E 2C6, Canada
[18] SNOLAB, Sudbury, ON P3Y 1N2, Canada
[19] Chinese Acad Sci, Inst Microelect, Beijing 100029, Peoples R China
[20] Univ Sherbrooke, Dept Genie Elect & Genie Informat, Sherbrooke, PQ J1K 2R1, Canada
[21] Brookhaven Natl Lab, Upton, NY 11973 USA
[22] Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA
[23] Stanford Univ, Dept Phys, Stanford, CA 94305 USA
[24] Univ N Carolina, Dept Phys & Phys Oceanog, Wilmington, NC 28403 USA
[25] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada
[26] Drexel Univ, Dept Phys, Philadelphia, PA 19104 USA
[27] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55122 Mainz, Germany
[28] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
[29] Univ Massachusetts, Amherst Ctr Fundamental Interact, Amherst, MA 01003 USA
[30] Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA
[31] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA
[32] Yale Univ, Dept Phys, Wright Lab, New Haven, CT 06511 USA
[33] Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA
[34] IBS Ctr Underground Phys, Daejeon 34126, South Korea
[35] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA
[36] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA
[37] Indiana Univ, CEEM, Bloomington, IN 47405 USA
[38] Univ Bern, Albert Einstein Ctr, LHEP, CH-3012 Bern, Switzerland
[39] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA