  CP-odd Higgs couplings to bottom and charm quarks arise in many extensions of
the standard model and are of potential interest for electroweak baryogenesis.
These couplings induce a contribution to the electron EDM. The experimental
limit on the latter then leads to a strong bound on the CP-odd Higgs couplings.
We point out that this bound receives large QCD corrections, even though it
arises from a leptonic observable. We calculate the contribution of CP-odd
Higgs couplings to the bottom and charm quarks in renormalisation-group
improved perturbation theory at next-to-leading order in the strong
interaction, thereby reducing the uncertainty to a few percent.

High Energy Physics - Phenomenology