2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/178722We report on results of an experimental search for the K_L -> pi^+ pi^- e^+ e^- decay mode. We found 13.5 +- 4.0 events and determined its branching ratio to be (4.4 +- 1.3(stat) +- 0.5(syst))*10^{-7}. The result agrees well with the theoretical prediction.9 pages, 6 eps-figures, LaTeX2e, graphicx package, submitted to Physics Letters BHigh Energy Physics - Experimenttext