2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/25149Elastic forward scattering can lead to an anomaly in the ARPES spectrum of the cuprate superconductors. Here we discuss how this anomaly can be used to provide a measurement of the superconducting gap Delta_k for k values away from the Fermi surface.4 pages, 5 figures, one figure and discussion added, references updatedSuperconductivitytext