2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/82393The chiral two-pion exchange nucleon-nucleon interaction has nowadays a rather firm conceptual basis, but depends on low-energy constants, which may be extracted from fits to data. In order to facilitate this kind of application, we present here a parametrized version of our relativistic expansion of this component of the force to $O(q^4)$, performed recently.7 pages, no figures, revtexNuclear Theorytext