Search for the Standard Model Higgs boson in the decay channel H → ZZ(⁎) → 4ℓ with 4.8 fb⁻¹ of pp collision data at √s = 7 TeV with ATLAS
Files
(Published version)
Date
2012
Authors
Aad, G.
ATLAS Collaboration,
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Physics Letters B: Nuclear Physics and Particle Physics, 2012; 710(3):383-402
Statement of Responsibility
G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... N. Soni ... M.J. White ... et al. (ATLAS Collaboration)
Conference Name
Abstract
This Letter presents a search for the Standard Model Higgs boson in the decay channel H→ZZ(*)→ℓ⁺ℓ⁻ℓ′⁺ℓ′⁻, where ℓ,ℓ′ = e or μ , using proton–proton collisions at √s=7 TeV recorded with the ATLAS detector and corresponding to an integrated luminosity of 4.8 fb⁻¹. The four-lepton invariant mass distribution is compared with Standard Model background expectations to derive upper limits on the cross section of a Standard Model Higgs boson with a mass between 110 GeV and 600 GeV. The mass ranges 134–156 GeV, 182–233 GeV, 256–265 GeV and 268–415 GeV are excluded at the 95% confidence level. The largest upward deviations from the background-only hypothesis are observed for Higgs boson masses of 125 GeV, 244 GeV and 500 GeV with local significances of 2.1, 2.2 and 2.1 standard deviations, respectively. Once the look-elsewhere effect is considered, none of these excesses are significant.
School/Discipline
Dissertation Note
Provenance
Description
Access Status
Rights
© 2012 CERN. Published by Elsevier B.V. Open access under CC BY-NC-ND license.