Study of the $H^0$(125) and QCD kinematical distributions in the diphoton final state with the CMS detector at the LHC.

In this report, I present the part I took in data analysis of the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) for proton-proton collisions at $\sqrt{s}=8$ TeV. The aim of this project was the measurement of the kinematical variables of the $H^0$ at $125$ GeV. I focus in the present work on the $p_T$ and $|cos(\theta*)|$ in CS frame distributions. I introduce here the analysis strategy and the preliminary results obtained from simulations and blinded data.