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Article
Report number arXiv:1212.3572 ; CERN-PH-EP-2012-347 ; CERN-PH-EP-2012-347
Title Search for charged Higgs bosons through the violation of lepton universality in tˉt events using pp collision data at s = 7 TeV with the ATLAS experiment
Related titleSearch for charged Higgs bosons through the violation of lepton universality in ttbar events using pp collision data at sqrt(s) = 7 TeV with the ATLAS experiment
Author(s) ATLAS Collaboration  Mostrar todos os 2900 autores
Publication 2013
Imprint 17 Dec 2012
Number of pages 20
Note Comments: 20 pages plus author list (43 pages total), 7 figures, 6 tables, submitted to JHEP, all figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2012-22/ Revision corresponds to published version
20 pages plus author list (43 pages total), 7 figures, 6 tables, submitted to JHEP, all figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2012-22/ Revision corresponds to published version
In: JHEP 03 (2013) 076
DOI 10.1007/JHEP03(2013)076
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords Higgs physics ; exotics ; experimental results
Abstract In several extensions of the Standard Model, the top quark can decay into a bottom quark and a light charged Higgs boson H+,tbH+, in addition to the Standard Model decay tbW. Since W bosons decay to the three lepton generations equally, while H+ may predominantly decay into τν, charged Higgs bosons can be searched for using the violation of lepton universality in top quark decays. The analysis in this paper is based on 4.6/fb of proton-proton collision data at s = 7 TeV collected by the ATLAS experiment at the Large Hadron Collider. Signatures containing leptons (e or μ) and/or a hadronically decaying τ(τhad) are used. Event yield ratios between e+τhad and e+μ, as well as between μ+τhad and μ+e, final states are measured in the data and compared to predictions from simulations. This ratio-based method reduces the impact of systematic uncertainties in the analysis. No significant deviation from the Standard Model predictions is observed. With the assumption that the branching fraction B(H+τν) is 100%, upper limits in the range 3.2%-4.4% can be placed on the branching fraction B(tbH+) for charged Higgs boson masses mH+ in the range 90-140 GeV. After combination with results from a search for charged Higgs bosons in ttbar decays using the τhad+jets final state, upper limits on B(tbH+) can be set in the range 0.8%-3.4%, for mH+ in the range 90-160 GeV.
Copyright/License preprint: © 2012-2024 CERN (License: CC-BY-3.0)
publication: © 2013-2024 CERN (License: CC-BY-3.0)



Corresponding record in: Inspire
Email contact: tony.doyle@glasgow.ac.uk


 Record created 2012-12-17, last modified 2024-03-14


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