Dark Matter Searches in Association with the Higgs Boson

What Dark matter (DM) is remains a mystery. When one refers to it, a non-visible matter that interacts only weakly with standard matter is implied. In this work, we present the characteristics of the main background for the search of dark matter in association with the Higgs boson in proton-proton collisions. By comparing the final states and acceptance of different processes for the signal selection the largest contribution of the backgrounds is identified.