Charm CP violation and the electric dipole moments from the charm scale

The, reported CP asymmetry in D -> K+ K-/pi(+) pi(-) is argued to be too large to naturally fit the SM. If so. a new source of CP violation is implied in the Delta C = 1 sector with a milliweak strength. CP-odd interactions in the flavor-diagonal sector are strongly constrained by the EDMs placing severe limitations on the underlying theory. While the largest effects usually come directly from the effective operators generated at the New Physics energy scale, they are strongly model-dependent. Yet the interference of the CP-odd forces manifested in D decays with the conventional CP-even Delta C = 1 weak interaction at the charm scale also generates d(n) at a certain level. It has been argued that the d in the SM is largely generated via such an interference, with mild KM-specific additional suppression. The reported CP asymmetry is expected to generate d through such effects of 30 to 100 times larger than in the SM, or even higher in certain, yet not fully natural, scenarios. In the SM the charm-induced loop-less d, is expected around 10(-31) e.cm. On the technical side, we present a compact Ward-identity-based derivation of the induced scalar pion-nucleon coupling in the presence of the CP-odd interactions, which appears once the latter include the right-handed light quarks.