Search for Higgs Boson Pair Production in the gamma gamma b(b)over-bar Final State Using pp Collision Data at root s=8 TeV from the ATLAS Detector
2015 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 114, no 8, 081802Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2015. Vol. 114, no 8, 081802
IdentifiersURN: urn:nbn:se:uu:diva-251662DOI: 10.1103/PhysRevLett.114.081802ISI: 000350210600004OAI: oai:DiVA.org:uu-251662DiVA: diva2:807366
ATLAS Collaboration, for complete list of authors see dx.doi.org/10.1103/PhysRevLett.114.0818022015-04-232015-04-232015-04-23Bibliographically approved