Analysis of the Higgs boson decaying to a pair of tau leptons using Run-2 data from ATLAS

In 2014, the ATLAS and CMS collaborations reported the combined Run-1 result of the discovery of the Higgs boson decaying into a pair of tau leptons. This H → ττ decay channel has the highest sensitivity among channels directly probing the Higgs Yukawa couplings. With the increased luminosity expected in Run 2, ATLAS aims to not only independently establish 5σ evidence for H → ττ, but also to measure fiducial and differential H → ττ cross sections with high precision. In addition, while CP studies in the bosonic decay channels of the Higgs indicate the compatibility of the Higgs boson's CP properties with that of SM predictions, fermions provide unique information on Higgs CP. This talk will discuss the analysis and background estimation methods for the H → ττ decay channel, where both taus decay hadronically, for Higgs coupling and CP measurements with Run-2 data at ATLAS.