2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/140858We explore how the polarization of the tau leptons in the cascade decay $\tilde{q}\to q\tildeχ^0_2\to qτ\tildeτ\to qττ\tildeχ^0_1$ can be exploited to study mixing properties of neutralinos and staus. We present details of the analysis including experimental effects such as transverse momentum cuts for the $τ\toπν$ decay mode, and show that the di-pion invariant mass distribution provides valuable information on their properties.Submitted for the SUSY07 proceedings, 4 pages, LaTeX, 2 axodraw figures + 4 eps figuresHigh Energy Physics - Phenomenologytext