Study of FCNC mediated Z boson effectin the semileptonic rare baryonic decays Λ b → Λl + l - A. K. Giri and R. Mohanta Eur. Phys. J. C, 45 1 (2006) 151-158 Published online: 15 January 2006 DOI: 10.1140/epjc/s2005-02407-6