Newly discovered Higgs-like boson with the ATLAS detector : production modes and couplings

• Elisabeth Petit

The discovery of a boson in the mass region of 126 GeV in the search for the Standard Model Higgs boson by the ATLAS and CMS collaborations at the LHC was one of the greatest achievement in particle physics over the last decade. However the detailed consistency of the properties of this new particle with the expectation for the SM Higgs boson still needed to be assessed. The measured mass, around 126 GeV, allows to study this boson in several decay channels. With the data recorded by the ATLAS detector in 2011 and 2012, it is also possible to distinguish between several production modes. Since the couplings of the Higgs boson to the fermions and bosons determines the production cross-section and partial branching ratios, the studies of those production and decay modes allows us to have a first estimate of those couplings.