LHC experimental sensitivity to CP violating g-t-tbar couplings

The level of CP violation in top quark events induced by the Standard Model is known to be beyond the experimental sensitivity by many orders of magnitude. However, within the language of effective theories, it is plausible that new CP violating physics could reveal itself as additional non renormalizable terms in the Lagrangian. Since these should respect the symmetries of the low energy gauge interaction, violate CP and generate the correct event topology, th set of allowed terms is highly restricted. This analysis gives an estimate of the sensitivity to the lowest order effective CP violating g-t-tbar interaction term beyond the Standard Model using the ATLAS detector at the LHC