2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/211455The transverse part of the three-point Green function of massless QED is determined to the lowest order in position space. Taken together with the evaluation of the longitudinal part in arXiv:0803.2630, this gives a relation for QED which is analogous to the star-triangle relation. We relate our result to conformal-invariant three-point functions.8 pagesHigh Energy Physics - TheoryHigh Energy Physics - Phenomenologytext