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Observation of a new particle in the search for the Standard Model Higgs boson 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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Number of Authors: 2932
2012 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 716, no 1, 1-29 p.Article in journal (Refereed) Published
Abstract [en]

A search for the Standard Model Higgs boson in proton-proton collisions with the ATLAS detector at the LHC is presented. The datasets used correspond to integrated luminosities of approximately 4.8 fb(-1) collected at, root s = 7 TeV in 2011 and 5.8 fb(-1) at root s = 8 TeV in 2012. Individual searches in the channels H -> ZZ(()*()) -> 4l, H -> gamma gamma and H -> WW (()*()) -> ev mu v in the 8 TeV data are combined with previously published results of searches for H -> ZZ(()*()), WW(*()), b (b) over bar and tau(+)tau(-) in the 7 TeV data and results from improved analyses of the H -> ZZ(()*()) -> 4l and H -> gamma gamma channels in the 7 TeV data. Clear evidence for the production of a neutral boson with a measured mass of 126.0 +/- 0.4 (stat) +/- 0.4 (sys) GeV is presented. This observation, which has a significance of 5.9 standard deviations, corresponding to a background fluctuation probability of 1.7 x 10(-9), is compatible with the production and decay of the Standard Model Higgs boson.

Place, publisher, year, edition, pages
2012. Vol. 716, no 1, 1-29 p.
Keyword [en]
Proton-Proton Collisions, Hadron Colliders, Qcd Corrections, Parton Distributions, Transverse-Momentum, Massless Particles, Broken Symmetries, Cross-Sections, Root-S=7 Tev, Gauge Fields
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-109523DOI: 10.1016/j.physletb.2012.08.020ISI: 000309621400001Scopus ID: 2-s2.0-84865778015OAI: oai:DiVA.org:kth-109523DiVA: diva2:583094
Funder
Swedish Research Council
Note

QC 20130107. Author count: 2932

Available from: 2013-01-07 Created: 2013-01-07 Last updated: 2017-12-06Bibliographically approved

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