2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/180437We present the results of a complete two-loop calculation at order q^6 of the nucleon mass in manifestly Lorentz-invariant chiral perturbation theory. The renormalization is performed using the reformulated infrared renormalization, which allows for the treatment of two-loop integrals while preserving all relevant symmetries, in particular chiral symmetry.6 pages, 2 figures, REVTeX4High Energy Physics - PhenomenologyHigh Energy Physics - Latticetext