On the determination of Higgs parameters in the ATLAS experiment at the LHC

Once the Higgs boson will have been discovered, the determination of the Higgs boson parameters is a major goal. Precision measurements of these parameters allow a deeper understanding of the electroweak symmetry-breaking mechanism. They may also be useful to distinguish a Standard Model Higgs boson from a MSSM Higgs boson. In the present note it has been studied with what precision parameters like the Higgs boson mass, production rates, couplings to bosons and fermions, total width and spin can be measured in the ATLAS experiment. The results are given for integrated luminosities of 100 $fb^{-1}$ and 300 $fb^{-1}$.