Beihang University (BUAA) - Department of Physics, Beihang University (BUAA) - Department of Physics, Beihang University (BUAA) - Department of Physics, Chinese Academy of Sciences (CAS) - Institute of Modern Physics, Hunan University - School of Physics and Electronics, University of Michigan at Ann Arbor - Department of Nuclear Engineering and Radiological Sciences, California State University, Northridge - Department of Physics & Astronomy and California State University, Northridge - Department of Physics & Astronomy