-
[1]
E. Laerman et a1.4 Phys. Lett.，B173(1986)，437.[2]Dong Yu-bing and Yu You-wen, IHEP-TH-92-27;Zhang Zong-ye et al.，IHEP-TH-92-28.[3]S. Ono and F. Schoberl, Phys. Lett.，B118(1982)，419.[4]A. Barchielli et al.，Nuovo Cimento, 103A(1990)，59; Yu-qi Chen and Yu-ping Kuang, Phys. Rev.，D46(1992)，1165. Y. B. Ding, J. He, S. O. Cai, D. H. Qin and K. T. Chao, in "Particles and Nuclear Physics", Proceedings of the International Symposium, Beijing, China, 1985. edited by N. Hu and C. -S. Wu (world Scientific, Singapore, 1987)，P88.[5]Particle Data Group, Phys. Rev.，D45 No 11一I (1992)，1.