• [1]

    R Ammar et al, CLEO Collaboration, Phys. Rev. Lett., 71(1993)674.[2] M.S. Alarn et al., CLEO Collaboration, Phys. Rev. Lett., 74(1995)2885.[3] J . L. Hewett, SLAC Report No. SLAC-PUB-6521,1994(unpublished).[4] M. Misiak, Phys. Lett., B269(1991)161; K Adel, Y.P. Yao, Phys. Rev., D49(1994)4945; M. Ciuchini et al., Phys. Lett, B316(1993) 127.[5] S. Weinberg, Phys. Rev., D19(1979)1277; L. Susskind, Phys. Rev., 20(1979)2619.[6] S. Dimopoulos, L. Susskind, Nucl. Phys., B155(1979)237; E. Eichten, K Lane, Phys. Lett., B90(1980)125.[7] T. Appelquist, D. Karabali L. C. R Wijewardhana, Phys. Rev. Lett., 57(1986)957.[8] T. Appelquist, J. Terning, Phys. Lett., B315(1993) 139.[9] K. Lane, M. V. Ramana, Phys. Rev., D44(1991)2678.[10] E. Eichten, K Lane, Phys. Lett., B327(1994)129.[11] J. F. Gunion, H. E. Haber, Nucl. Phys., B278(1986)449.[12] H D. Politzer, Nucl. Phys., B172(1980) 349.[13] Particle Data Group, Phys. Rev., DSO(1994) 1173.[14] CDF collaboration, F. Abe et al., Phys. Rev. Lett., 74(1995)2626; DO Collaboration, S. Abachi er ab, Phys. Rev. Lett., 74(1995)2632.[15] T. Appelqulst, M. B. Einhom, T. Takeuchi et a/., Phys. Lett., B220(1989)223.[16] C. T. Hill, Phys. Lett., B266(1991)419.[17] C. T. Hill, Phys. Lett., B345(1995)483.[18] M. Ciuchini et al., Phys. Lett, B301(1993)263; Nucl. Phys., B415(1994)403.[19] C. S. Gao, J. L. Hu, C. D. L et al,, Phys. Rev., D52(1995)3978.