[Li, Bao-An;Cai, Bao-Jun] Texas A&M Univ, Dept Phys & Astron, Commerce, TX 75429 USA.^[Chen, Lie-Wen] Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China.^[Chen, Lie-Wen] Shanghai Jiao Tong Univ, Shanghai Key Lab Particle Phys & Cosmol, Shanghai 200240, Peoples R China.^[Li, Xiao-Hua] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.