A strong QCD enhancement of CP violation in charmed meson decays?

The mass difference of c and u quarks is similar to the energy needed to excite gluonic degrees of freedom in strong QCD. This underpins the degeneracy of D and a recently observed candidate hybrid excitation of the π at ∼ 1.8 GeV and may generate a strong analogue of Penguin mixing together with a measurable CP-violation in D and Ds decays.