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Search for Scalar Diphoton Resonances in the Mass Range 65-600 GeV with the ATLAS Detector in pp Collision Data at sqrt[s]=8 TeV.

Aad, G ; Abbott, B ; Abdallah, J ; Abdel Khalek, S ; Abdinov, O ; Aben, R ; Abi, B ; Abolins, M ; AbouZeid, O S and Abramowicz, H , et al. (2014) In Physical Review Letters 113(17).
Abstract
A search for scalar particles decaying via narrow resonances into two photons in the mass range 65-600 GeV is performed using 20.3 fb^{-1} of sqrt[s]=8 TeV pp collision data collected with the ATLAS detector at the Large Hadron Collider. The recently discovered Higgs boson is treated as a background. No significant evidence for an additional signal is observed. The results are presented as limits at the 95% confidence level on the production cross section of a scalar boson times branching ratio into two photons, in a fiducial volume where the reconstruction efficiency is approximately independent of the event topology. The upper limits set extend over a considerably wider mass range than previous searches.
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