2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/156167This paper has been withdrawn by the authors due to a coding error and a missed diagram. The calculation has been completely redone, with very different results, and with an additional author, and will be submitted to the arxiv shortly.This paper has been withdrawn by the authorsHigh Energy Physics - PhenomenologySingle Production of Heavy Charged Leptons at the ILCtext