2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/204295We have measured the nuclear transparency of the A(e,e' pi^+) process in ^{2}H,^{12}C, ^{27}Al, ^{63}Cu and ^{197}Au targets. These measurements were performed at the Jefferson Laboratory over a four momentum transfer squared range Q^2 = 1.1 - 4.7 (GeV/c)^2. The nuclear transparency was extracted as the super-ratio of $(σ_A/σ_H)$ from data to a model of pion-electroproduction from nuclei without pi-N final state interactions. The Q^2 and atomic number dependence of the nuclear transparency both show deviations from traditional nuclear physics expectations, and are consistent with calculations that include the quantum chromodynamical phenomenon of color transparency.5 pages, 3 figs Changes to figure 2 and 3 (error band updated and theory curves updated)Nuclear ExperimentHigh Energy Physics - PhenomenologyNuclear Theorytext