2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/192598It is well known that the CP violating theta term of QCD can be converted to a phase in the quark mass term. However, a theory with a complex mass term for quarks can be regularized so as not to violate CP, for example through a zeta function. The contradiction is resolved through the recognition of a dependence on the regularization or measure. The appropriate choice of regularization is discussed and implications for the strong CP problem are pointed out.REVTeX, 4 pagesHigh Energy Physics - TheoryHigh Energy Physics - Phenomenologytext