2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/151956A recent experimental Physical Review Letter which claims to prove the existence of the single-electron ripplonic polaron associated with electrons on a helium film is examined. A correct evaluation of the holding field and a restriction of the polaron radius to the Wigner-Seitz radius lead to a gross discrepancy between experiment and theory. The polaron is not bound under the experimental conditions.1 page, 2 figures, TeXStrongly Correlated Electronstext