[Feng, Huan-Bo; Xie, Fei; Liu, Hong-Bang; Liang, En-Wei; Feng, Zu-Ke] Guangxi Univ, Sch Phys Sci & Technol, Guangxi Key Lab Relativist Astrophys, Nanning 530004, Peoples R China.
[Wang, Dong; Wang, Hui; Chen, Ran] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, PLAC, Wuhan 430079, Peoples R China.
[Liu, Shu-Lin] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
[Liu, Shu-Lin] Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China.
[Yi, Di-Fan; Liu, Qian] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China.