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Combined search for the Standard Model Higgs boson using up to 4.9 fb(-1) of pp collision data at root s=7 TeV with the ATLAS detector at the LHC
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
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2012 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 710, no 1, 49-66 p.Article in journal (Refereed) Published
Abstract [en]

A combined search for the Standard Model Higgs boson with the ATLAS experiment at the LHC using datasets corresponding to integrated luminosities from 1.04 fb(-1) to 4.9 fb(-1) of pp collisions collected at root s = 7 TeV is presented. The Higgs boson mass ranges 112.9-115.5 GeV, 131-238 GeV and 251-466 GeV are excluded at the 95% confidence level (CL), while the range 124-519 GeV is expected to be excluded in the absence of a signal. An excess of events is observed around m(H) similar to 126 GeV with a local significance of 3.5 standard deviations (sigma). The local significances of H -> gamma, H -> ZZ(()*()) -> l(+)l(-)l'(+)l'(-) and H -> WW(*()) l(+)nu l'(-)(nu) over bar, the three most sensitive channels in this mass range, are 2.8 sigma, 2.1 sigma and 1.4 sigma. respectively. The global probability for the background to produce such a fluctuation anywhere in the explored Higgs boson mass range 110-600 GeV is estimated to be similar to 1.4% or, equivalently, 2.2 sigma.

Place, publisher, year, edition, pages
2012. Vol. 710, no 1, 49-66 p.
Keyword [en]
Hadron Colliders, Qcd Corrections, Massless Particles, Broken Symmetries, Nnlo Qcd, Decays
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-96833DOI: 10.1016/j.physletb.2012.02.044ISI: 000302672500006Scopus ID: 2-s2.0-84862776922OAI: oai:DiVA.org:kth-96833DiVA: diva2:533176
Note
QC 20120613. Author count: 3051Available from: 2012-06-13 Created: 2012-06-13 Last updated: 2017-12-07Bibliographically approved

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Strandberg, Jonas

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Jovicevic, JelenaKuwertz, Emma S.Lund-Jensen, BengtStrandberg, Jonas
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