Combined search for the Standard Model Higgs boson using up to 4.9 fb[superscript −1] of pp collision data at √s = 7 TeV with the ATLAS detector at the LHC
Name
Aad-2012-Combined search for.pdf
Size
1.24 MB
Format
Adobe PDF
Checksum (MD5)
90729c25fad2dc77e4172a26a2a5f04a
Author(s)
Taylor, Frank E.
Date Issued
February 2012
Journal
Physics Letters B
Publisher
Elsevier
Citation
Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, A.A. Abdelalim, A. Abdesselam, O. Abdinov, et al. “Combined Search for the Standard Model Higgs Boson Using up to 4.9 Fb[superscript −1] of Pp Collision Data at √s = 7 TeV with the ATLAS Detector at the LHC.” Physics Letters B 710, no. 1 (March 2012): 49–66. © 2012 CERN
Version
Final published version
Abstract
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[superscript −1] to 4.9 fb[superscript −1] of pp collisions collected at √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[subscript H]∼126 GeV with a local significance of 3.5 standard deviations (σ). The local significances of H→γγ, H→ZZ(*)→ℓ[superscript +]ℓ[superscript −]ℓ′[superscript +]ℓ′[superscript −] and H→WW(*)→ℓ[superscript +]νℓ′[superscript −][bar over v], the three most sensitive channels in this mass range, are 2.8σ, 2.1σ and 1.4σ, 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 ∼1.4% or, equivalently, 2.2σ.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.physletb.2012.02.044
