2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/198270We report the result of a search for D0 - D0_bar mixing in the data from hadroproduction experiment E791 at Fermilab. We use the D* tag and semileptonic decay vertices of D0 to look for wrong-sign decays with mixing time dependence.Total 9 pages, Includes two figuresHigh Energy Physics - Experimenttext