  A comprehensive study of the impact of new-physics on different observables
for $B_{s}\to \phi \ell^{+}\ell^{-}$ has been done. We examine the new physics
models such as $Z^{\prime}$ and UED models, where the effects of new physics
coming through the modification of Wilson coefficients. We have analyzed these
effects through the theoretical prediction of the branching ratio, the
forward-backward asymmetry, lepton polarization asymmetries and the helicity
fractions of the final state meson. These all observables will definitely be
measured in present and future colliders with great precision. We also pointed
out that hadronic uncertainties in various physical observables are small which
make them an ideal probe to establish new physics. Therefore, the measurements
of these observables for the same decay would permit the detection of physics
beyond the Standard Model and will also help us to distinguish between
different new physics scenarios.
