This contribution summarizes the discovery potential of the Standard Model
Higgs boson using the Hγγ decay with the ATLAS detector. The
relevant detector performance aspects of photon reconstruction, photon
identification and trigger issues are discussed. The potential of inclusive Hγγ as well as Higgs boson searches in association with one or two
hard jets are studied. The discovery potential is finally assessed using an
unbinned multivariate maximum-likelihood fit with an expected integrated
luminosity of ≈10fb−1.Comment: 5 pages, 4 figures, Contribution to Conference LHC0