Research Papers in Physics and Astronomy


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Published in Physical Review Letters 102, 231801 (2009). Copyright © 2009 The American Physical Society. Used by permission.


We present a search for a narrow resonance in the inclusive diphoton final state using ~2.7 fb-1 of data collected with the D0 detector at the Fermilab Tevatron pp Collider.We observe good agreement between the data and the background prediction, and set the first 95% C.L. upper limits on the production cross section times the branching ratio for decay into a pair of photons for resonance masses between 100 and 150 GeV. This search is also interpreted in the context of several models of electroweak symmetry breaking with a Higgs boson decaying into two photons.

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