Probing the Nature of Higgs Physics and Electroweak Symmetry Breaking with Results from the LHC

The discovery of a Higgs signal at the LHC marks the beginning of a new era of particle physics. The prime goal now is to identify the underlying physics of the new state and to determine the mechanism of electroweak symmetry breaking. Some of the results obtained in this project are highlighted, covering both the period before and after the discovery. In particular, the properties of the new state have been investigated in close cooperation between experiment and theory and the possible interpretations of the observed signal have been analysed. C FConfronting the experimental results on the signal as well as from the search limits with model predictions, the resulting constraints on the parameter space of different models and their phenomenological implications have been demonstrated.