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A search for a narrow diphoton mass resonance is presented based on data from 3.0fb-1 of integrated luminosity from pp̄ collisions at s=1.96TeV collected by the CDF experiment. No evidence of a resonance in the diphoton mass spectrum is observed, and upper limits are set on the cross section times branching fraction of the resonant state as a function of Higgs boson mass. The resulting limits exclude Higgs bosons with masses below 106GeV/c2 at a 95% Bayesian credibility level for one fermiophobic benchmark model. © 2009 The American Physical Society.

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Physical Review Letters