[Zheng, Hua; Zhang, Wen-Chao; Wu, Wei-Hao; Zheng, H] Shaanxi Normal Univ, Sch Phys & Informat Technol, Xian 710119, Peoples R China.
[Tao, Jun-Qi] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.
[Tao, Jun-Qi] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
[Liu, Xing-Quan] Sichuan Univ, Inst Nucl Sci & Technol, Chengdu 610064, Peoples R China.
[Zhu, Li-Lin] Sichuan Univ, Dept Phys, Chengdu 610064, Peoples R China.