2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/224259The complex mass term of a quark does not violate time-reversal or parity in gravitational interactions, in spite of an axial anomaly.4 pages, to appear in Classical and Quantum GravityHigh Energy Physics - TheoryGeneral Relativity and Quantum CosmologyHigh Energy Physics - Phenomenologytext