2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/179352The coefficient of the Chern-Simons term in the effective action for massive Dirac fermions in three dimensions is computed by using the point-splitting regularization method. We show that in this framework no ambiguities arise. This is related to the fact that the point-splitting regularization does not introduce additional parity breaking effects, implementing one possible physical criterion in order to uniquely characterize the system.9 pages, RevTex. Minor changes, some references addedHigh Energy Physics - TheoryCondensed Mattertext