Abstract
We study the $\mathrm{CP}$-violating $\ensuremath{\theta}$ term in QCD induced by the renormalization-group evolution of the chromoelectric dipole moments of gluons and heavy quarks. It is pointed out that this renormalization-group effect makes the neutron electric dipole moment from the $\ensuremath{\theta}$ term at the hadronic scale dominate over that from other contributions in a large class of models without a Peccei-Quinn symmetry.
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