On CP Asymmetries in Two-, Three- and Four-Body D Decays

Understand

Indirect and direct CP violations have been established in K_L and B_d decays.

• They have been found in two-body decay channels -- with the exception of K_L to pi^+ pi^- e^+ e^- transitions.
• Evidence for direct CP asymmetry has just appeared in LHCb data on A_{CP}(D^0 to K^+ K^-) - A_{CP}(D^0 to pi^+ pi^-) with 3.5 sigma significance.
• Manifestations of New Dynamics (ND) can appear in CP asymmetries just below experimental bounds.