[Yin, Lei] South China Normal Univ, Sch Phys & Telecommun Engn, Inst Quantum Matter, Guangzhou 510006, Guangdong, Peoples R China.
[Ren, Hai-cang] Rockefeller Univ, Phys Dept, 1230 York Ave, New York, NY 10021 USA.
[Ren, Hai-cang] Cent China Normal Univ, Wuhan 430079, Hubei, Peoples R China.
[Hou, Defu] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Hubei, Peoples R China.
[Hou, Defu] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOS, Wuhan 430079, Hubei, Peoples R China.