Search for a Higgs boson produced in the vector boson fusion process in the diphoton channel with the ATLAS experiment

Details of the production of the new particle discovered by the ATLAS experiment at the LHC in the mass region of mH = 126 GeV in the search for the Standard Model Higgs boson at s = 7 TeV and 8 TeV are presented. The addition of a category enriched in vector boson fusion events in the H ->gammagamma search allows to increase the sensitivity of the search of a Standard Model Higgs boson. It also allows to separate better between gluon fusion and vector boson production modes, thus giving a first insight to the couplings of this newly discovered boson.