1. Instituto de Física, Universidad Nacional Autónoma de México, A.P. 20-364, Mexico City 01000, Mexico
2. Department of Physics and Astronomy, Indiana University South Bend, South Bend, IN 46634, USA
3. Department of Physics, Drexel University, Philadelphia, PA 19104, USA
4. Department of Physics, Engineering Physics, and Astronomy, Queen’s University, Kingston, ON K7L 3N6, Canada
5. Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA
6. Fermi National Accelerator Laboratory, Batavia, IL 60510, USA
7. Department of Physics, University of Alberta, Edmonton, AB T6G 2E1, Canada
8. TRIUMF, Vancouver, BC V6T 2A3, Canada
9. SNOLAB, Lively, ON P3Y 1N2, Canada
10. Department of Physics and Astronomy, Northeastern Illinois University, Chicago, IL 60625, USA
11. Pacific Northwest National Laboratory, Richland, WA 99354, USA
12. Département de Physique, Université de Montréal, Montreal, QC H3T 1J4, Canada
13. Department of Physics, University of California Santa Barbara, Santa Barbara, CA 93106, USA
14. Materials Research Institute, Pennsylvania State University, University Park, PA 16802, USA
15. Department of Physics and Astronomy, University of California, Riverside, CA 92507, USA