2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/169948The Hidden Thresholds technique reconstructs New Physics (NP) masses from two or more simultaneous NP decays at a hadron collider. We show how this works in several MSSM examples: $\widetildeχ_{i}^0 \widetildeχ_{j}^0 \to e^+ e^- μ^+ μ^- \widetildeχ_{1}^0 \widetildeχ_{1}^0$ ($i,j=2,3,4$) and ${\widetildeχ_1}^\pm {\widetildeχ_2}^0 \to {W^\pm}^*(\to \ell^\pm ν) {\widetildeχ_1}^0 ~ {Z^0}^*(\to \ell^\pm \ell^\mp) {\widetildeχ_1}^0 $.Parallel talk at ICHEP08, Philadelphia, USA, July 2008. 4 pages, 3 figuresHigh Energy Physics - Phenomenologytext