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  • PhysRevLett.114.081802

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Search for Higgs Boson pair production in the γγbb¯ final state using pp collision data at √s=8  TeV from the ATLAS detector

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Article number081802
<mark>Journal publication date</mark>26/02/2015
<mark>Journal</mark>Physical review letters
Volume114
Number of pages19
Publication StatusPublished
<mark>Original language</mark>English

Abstract

Searches are performed for resonant and nonresonant Higgs boson pair production in the γγbb¯ final state using 20  fb−1 of proton-proton collisions at a center-of-mass energy of 8 TeV recorded with the ATLAS detector at the CERN Large Hadron Collider. A 95% confidence level upper limit on the cross section times branching ratio of nonresonant production is set at 2.2 pb, while the expected limit is 1.0 pb. The difference derives from a modest excess of events, corresponding to 2.4 standard deviations from the background-only hypothesis. The limit observed in the search for a narrow X→hh resonance ranges between 0.7 and 3.5 pb as a function of the resonance mass.

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© 2015 CERN, for the ATLAS Collaboration