[Chen, YD; Chen, Yidian] Hangzhou Normal Univ, Sch Phys, Hangzhou 311121, Peoples R China.
[Chen, Xun] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
[Chen, Xun] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.
[Li, Danning] Jinan Univ, Dept Phys, Guangzhou 510632, Peoples R China.
[Li, Danning] Jinan Univ, Siyuan Lab, Guangzhou 510632, Peoples R China.