Search for Non-Standard Model Behavior, including CP Violation, in Higgs Production and Decay to $ZZ^{*}$

This thesis presents an ATLAS study of the tensor structure characterizing the interaction of the scalar Higgs boson with two $Z$ bosons. The measurement is based on $25~\textrm{fb}^{-1}$ of proton-proton collision data produced at the Large Hadron Collider with center of mass energy equal to 7 and $8~\textrm{TeV}$. Nine discriminant observables in the four lepton final state are used to search for CP-odd and CP-even components in the Lagrangian beyond those of the Standard Model. These are represented by $(\tilde{\kappa}_{AVV}/\kappa_{SM})\tan\alpha$ and $\tilde{\kappa}_{HVV}/\kappa_{SM}$, respectively. Both of these parameters are found to be consistent with their predicted Standard Model values of zero. Values outside the intervals $-3.24<(\tilde{\kappa}_{AVV}/\kappa_{SM})\tan\alpha<0.91$ and $-0.82<\tilde{\kappa}_{HVV}/\kappa_{SM}<0.87$ are excluded at 95\% confidence level. These results are combined with a search for the same structure in the interaction of the Higgs with pairs of $W$ bosons.