ProbingCP-violation at colliders through interference effects in diboson production and decay

Abstract

We define a $CP$-asymmetric observable that is sensitive to $CP$-violating interactions in the gauge-boson sector. We illustrate the utility of this observable by studying how well the LHC can measure the coefficient of a particular dimension-six $WWZ$ operator. We find that sensitivity at the ${10}^{\ensuremath{-}3}$ level is possible at the LHC with $100\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of integrated luminosity, which would greatly exceed the sensitivity achieved at LEP, and would rival or may even better the indirect sensitivities inferred from related operators constrained by electric dipole moment experiments.