Constraining CP-violating Higgs Sectors at the LHC using gluon fusion

Understand

We investigate the constraints that the LHC can set on a 126 GeV Higgs boson that is an admixture of CP eigenstates.

• Traditional analyses rely on Higgs couplings to massive vector bosons, which are suppressed for CP-odd couplings, so that these analyses have limited sensitivity.
• Instead we focus on Higgs production in gluon fusion, which occurs at the same order in the strong coupling for both CP-even and -odd couplings.
• We study the Higgs plus two jet final state followed by Higgs decay into a pair of tau leptons.