  The LHCb collaboration recently announced preliminary evidence for CP
violation in D meson decays. We discuss this result in the context of the
standard model (SM), as well as its extensions. In the absence of reliable
methods to evaluate the hadronic matrix elements involved, we can only estimate
qualitatively the magnitude of the non-SM tree level operators required to
generate the observed central value. In the context of an effective theory, we
list the operators that can give rise to the measured CP violation and
investigate constraints on them from other processes.
