2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/183936The sensitivity of the present CNGS beam to the sub-dominant $ν_μ\leftrightarrow ν_e$ oscillations in the region indicated by the atmospheric neutrino experiments is investigated. In particular, we present a revised analysis of the OPERA detector and discuss the sensitivity to $θ_{13}$ of ICARUS and OPERA combined. We show that the CNGS beam optimised for $ν_τ$ appearance, will improve significantly (about a factor 5) the current limit of CHOOZ and explore most of the region $\sin^22θ_{13}\simeq\mathcal{O}(10^{-2})$.High Energy Physics - Phenomenologytext