Moscow International School of Physics 2020

The analysis presented studies the production of a Higgs boson via gluon fusion in association with 2 jets with the aim of setting constraints on the CP properties of the top-Yukawa coupling. According to the SM, the Higgs boson must to be a CP even scalar, however some Beyond Standard Model theories predict the existence of the superposition of CP eigenstates, resulting in a CP mixed state. The distribution of the azimuthal angle between the two jets produced in association with the Higgs boson in the gluon fusion process is directly correlated with its CP properties and is therefore used to investigate the top-Yukawa coupling. Results based on the analysis of the Run-2 dataset collected with the ATLAS experiment at a center-of-mass of 13 TeV will be presented.