[Xing, Hongxi; Kang, Zhong-Bo] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
[Wang, Enke; Xing, Hongxi; Wang, Xin-Nian] Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
[Wang, Enke; Xing, Hongxi; Wang, Xin-Nian] Cent China Normal Univ, Key Lab Lepton & Quark Phys MOE, Wuhan 430079, Peoples R China.
[Wang, Xin-Nian] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
[Xing, Hongxi] Univ Sci & Technol China, Interdisciplinary Ctr Theoret Study, Hefei 230026, Peoples R China.