Search for the Higgs boson in the diphoton decay channel with the ATLAS detector

These proceedings report on a search for the Standard Model Higgs boson in the diphoton decay channel in proton-proton collisions at center-of-mass energies of √ s = 7TeV and √ s = 8TeV using integrated luminosities of 4.8fb−1 and 5.9fb−1, respectively, recorded with the ATLAS detector at the Large Hadron Collider. The search is performed for Higgs boson masses between 110 and 150GeV. The expected exclusion limit at 95% confidence level varies between 0.8 and 1.6 times the Standard Model cross section over the studied mass range, and results in an expected exclusion range from 110GeV to 140GeV. The observed exclusion ranges for a Standard Model Higgs boson are found to be (112−123)GeV and (132−143)GeV at 95% confidence level.