[Zhou, You] Univ Copenhagen, Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen, Denmark.
[Feng, Zhao; Xiao, Kai; Liu, Feng] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, Wuhan 430079, Peoples R China.
[Feng, Zhao; Xiao, Kai; Liu, Feng] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
[Xiao, Kai] South Cent Univ Nationalities, Wuhan 430074, Peoples R China.
[Snellings, Raimond] Univ Utrecht, POB 80000, NL-3508 TA Utrecht, Netherlands.