$Λ_b \to Λ\ell^+\ell^-$ and $Λ_b \to Λ^{\ast} \ell^+\ell^-$ decays with polarized leptons

We present an analysis of lepton polarization observables in the rare flavor-changing neutral current decays $Λ_b \to Λ\ell^+\ell^-$ and $Λ_b \to Λ^*\ell^+\ell^-$. These decays are driven by the quark-level transition $b \to s\ell^+\ell^-$ and are sensitive to short-distance physics within and beyon