Dublin Institute for Advanced Studies 31 Fitzwilliam Place 2 Dublin Ireland;
Max-Planck-Institut for Nuclear Physics P.O. Box 103980 69029 Heidelberg Germany;
School of Physics and Technology Wuhan University 430072 Wuhan Hubei China;
State Key Laboratory of Particle Detection and Electronics China;
University of Science and Technology of China 230026 Hefei Anhui China;
School of Physical Science and Technology & School of Information Science and Technology Southwest Jiaotong University 610031 Chengdu Sichuan China;
College of Physics Sichuan University 610065 Chengdu Sichuan China;
Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center Institute of High Energy Physics Chinese Academy of Sciences 100049 Beijing China;
TIANFU Cosmic Ray Research Center Chengdu Sichuan China;
School of Astronomy and Space Science Nanjing University 210023 Nanjing Jiangsu China;
Center for Astrophysics Guangzhou University 510006 Guangzhou Guangdong China;
Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center Institute of High Energy Physics Chinese Academy of Sciences 100049 Beijing China;
University of Chinese Academy of Sciences 100049 Beijing China;
TIANFU Cosmic Ray Research Center Chengdu Sichuan China;
Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center Institute of High Energy Physics Chinese Academy of Sciences 100049 Beijing China;
TIANFU Cosmic Ray Research Center Chengdu Sichuan China;
