Analysis of Λb→Λℓ+ℓ− decay within family non-universal Z′ model

We perform a comprehensive analysis of the rare Λb→Λℓ+ℓ− decay in the framework of family non-universal Z′ model. It is shown that Z′ gives considerable contribution to the forward-backward asymmetry and the asymmetry parameter αθ. The obtained results could be tested in near future at LHCb.