@Article{ATLASCollaborationAad_etal2013,
author="ATLAS Collaboration (Aad, G. et al
and Cabrera Urban, S.
and Castillo Gimenez, V.
and Costa, M. J.
and Fassi, F.
and Ferrer, A.
and Fiorini, L.
and Fuster, J.
and Garcia, C.
and Garcia Navarro, J. E.
and Gonzalez de la Hoz, S.
and Hernandez Jimenez, Y.
and Higon-Rodriguez, E.
and Irles Quiles, A.
and Kaci, M.
and Lacasta, C.
and Lacuesta, V. R.
and March, L.
and Marti-Garcia, S.
and Mi{\~A}{\textpm}ano, M.
and Mitsou, V. A.
and Moles-Valls, R.
and Moreno Llacer, M.
and Oliver Garcia, E.
and Pedraza Lopez, S.
and Perez Garcia-Esta{\~A}{\textpm}, M. T.
and Romero Adam, E.
and Ros, E.
and Salt, J.
and Sanchez Martinez, V.
and Solans, C. A.
and Soldevila, U.
and Sanchez, J.
and Torro Pastor, E.
and Valero, A.
and Valladolid Gallego, E.
and Valls Ferrer, J. A.
and Villaplana Perez, M.
and Vos, M.",
title="Search for charged Higgs bosons through the violation of lepton universality in t(t)over-bar events using pp collision data at root s=7 TeV with the ATLAS experiment",
journal="Journal of High Energy Physics",
year="2013",
publisher="Springer",
volume="03",
number="3",
pages="076--36pp",
optkeywords="Hadron-Hadron Scattering",
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+ may predominantly decay into tau nu, 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 root s = 7 TeV collected by the ATLAS experiment at the Large Hadron Collider. Signatures containing leptons (e or mu) and/or a hadronically decaying tau (tau(had)) are used. Event yield ratios between e+ tau(had) and e + mu, as well as between $\mu$+ tau(had) and $\mu$+ 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+ -> tau nu) 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 (t) over bar decays using the tau(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.",
optnote="WOS:000317521200076",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1415), last updated on Thu, 23 May 2013 11:05:17 +0000",
issn="1029-8479",
doi="10.1007/JHEP03(2013)076",
opturl="http://arxiv.org/abs/arXiv:1212.3572",
opturl="https://doi.org/10.1007/JHEP03(2013)076",
archivePrefix="arXiv",
eprint="arXiv:1212.3572",
language="English"
}