Higgs + 2 Jets as a Probe for CP Properties
  Azimuthal angle correlations of the jets in Hjj events at the LHC provide a probe of the CP nature of Higgs couplings to gauge bosons. In weak boson fusion the HWW and HZZ couplings are tested. Gluon fusion processes probe the tensor structure of the effective Hgg vertex and thus the CP nature of the dominant quark couplings. 
V. Hankele, G. Klamke, and D. Zeppenfeld