• [1]

    BAI J Z et al. (BES collaboration). Phys. Rev. D, 2014, 70: 012006[2] Olive K A et al. (Particle Data Group). Chin. Phys. C, 2014, 38: 090001[3] ZHU Yong-Sheng. Experiment Data Analysis. Beijing: Academic Press, 2012[4] Feldman G, Cousins R. Phys, Rev. D, 1998, 57: 3873