  Rare B decays provides an opportunity to probe for new physics beyond the
standard model. the effective Hamiltonian for the decay $b \to s l^+ l^-$
predicts the characteristic polarization for the final state lepton. Lepton
polarization has, in addition to a longitudinal component $P_L$, two orthogonal
components $P_T$ and $P_N$ lying in and perpendicular to the decay plane. In
this article we perform a study of the $\tau$-polarisation asymmetry in the
case of SUSY models with large $\tan\beta$ in the inclusive decay $B \to X_s
\tau^+ \tau^-$.
