Search for charged Higgs bosons through the violation of lepton universality in tt events using pp collision data at √S=7 TeV with the ATLAS experiment
Entity
UAM. Departamento de Física TeóricaPublisher
Springer Verlag; SISSA 2013Date
2013-03-13Citation
10.1007/JHEP03(2013)076
Journal of High Energy Physics 2013.3 (2013): 076
ISSN
1126-6708 (print); 1029-8479 (online)DOI
10.1007/JHEP03(2013)076Editor's Version
http://dx.doi.org/10.1007/JHEP03(2013)076Subjects
Hadron-hadron scattering; FísicaNote
Journal of High Energy Physics 2013.3 (2013): 076 reproduced by permission of Scuola Internazionale Superiore di Studi Avanzati (SISSA)Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM
Rights
© SISSA 2013Abstract
In several extensions of the Standard Model, the top quark can decay into a bottom quark and a light charged Higgs boson H +, t → bH +, in addition to the Standard Model decay t → bW. 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-1 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 (τ had) are used. Event yield ratios between e + τ had and e + μ, as well as between μ + τ had 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 (t → bH +) for charged Higgs boson masses m H+ in the range 90-140 GeV. After combination with results from a search for charged Higgs bosons in tt decays using the τ had + jets final state, upper limits on ℬ (t → bH +) can be set in the range 0.8%-3.4%, for mH+ in the range 90-160 GeV
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Google Scholar:ATLAS Collaboration
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Aad, G.
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Arnal, V.
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Barreiro Alonso, Fernando
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Cantero, J.
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de la Torre, H.
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Peso Malagón, José del
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Glasman Kuguel, Claudia Beatriz
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Labarga Echeverría, Luis Alfonso
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Llorente Merino, J.
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Terrón Cuadrado, Juan
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