2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37154The D0 meson can decay to the wrong sign K+pi- state either through a doubly Cabibbo suppressed decay or via mixing to the D0bar state followed by the Cabibbo favoured decay D0bar -> K+ pi-. We measure the rate of wrong sign decays relative to the Cabibbo favoured decay to (0.383 +- 0.044 +- 0.022)% and give our sensitivity to a mixing signal.5 pages, 4 postscript figues, contributed to the Proceedings of HEP2001High Energy Physics - Experimenttext