Search for the standard model higgs boson in the diphoton decay channel with 4.9 fb(-1) of pp collision data at root s=7 TeV with ATLAS
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KünyeADD, G., ABBOTT, B., ABDALLAH, J., KHALEK, S.A., ABDELALIM, A.A., ABDINOV, O., ATLAS Collaboration. (2012). Search for the standard model higgs boson in the diphoton decay channel with 4.9 fb(-1) of pp collision data at root s=7 TeV with ATLAS. Physical Review Letters, 108 (11). http://dx.doi.org/10.1103/PhysRevLett.108.111803.
A search for the standard model Higgs boson is performed in the diphoton decay channel. The data used correspond to an integrated luminosity of 4.9 fb(-1) collected with the ATLAS detector at the Large Hadron Collider in proton-proton collisions at a center-of-mass energy of root s = 7 TeV. In the diphoton mass range 110-150 GeV, the largest excess with respect to the background-only hypothesis is observed at 126.5 GeV, with a local significance of 2.8 standard deviations. Taking the look-elsewhere effect into account in the range 110-150 GeV, this significance becomes 1.5 standard deviations. The standard model Higgs boson is excluded at 95% confidence level in the mass ranges of 113-115 GeV and 134.5-136 GeV.