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Abstract:

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 + maypredominantlydecayinto 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 andμ + 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 t\\overline{t} 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 m H+ in the range 90-160 GeV.[Figure not available: see fulltext.] © 2013 Cern for the benefit of the ATLAS collaboration.

Registro:

Documento: Artículo
Título: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
Autor:Aad, G. et al.
Este artículo contiene 2900 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2900 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Palabras clave:Hadron-Hadron Scattering
Año:2013
Volumen:2013
Número:3
DOI: http://dx.doi.org/10.1007/JHEP03(2013)076
Título revista:Journal of High Energy Physics
Título revista abreviado:J. High Energy Phys.
ISSN:11266708
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2013_n3_p_Aad

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Citas:

---------- APA ----------
(2013) . 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. Journal of High Energy Physics, 2013(3).
http://dx.doi.org/10.1007/JHEP03(2013)076
---------- CHICAGO ----------
Aad, G. "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" . Journal of High Energy Physics 2013, no. 3 (2013).
http://dx.doi.org/10.1007/JHEP03(2013)076
---------- MLA ----------
Aad, G. "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" . Journal of High Energy Physics, vol. 2013, no. 3, 2013.
http://dx.doi.org/10.1007/JHEP03(2013)076
---------- VANCOUVER ----------
Aad, G. 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. J. High Energy Phys. 2013;2013(3).
http://dx.doi.org/10.1007/JHEP03(2013)076