[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China
[4] Chinese Acad Sci, Inst Theoret Phys, Kavli Inst Theoret Phys, Beijing 100190, Peoples R China
[5] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China