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

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dc.contributor.author The ATLAS collaboration
dc.contributor.author Aad, G.
dc.contributor.author Arnal, V.
dc.contributor.author Barreiro, Fernando
dc.contributor.author Cantero, J.
dc.contributor.author de la Torre, H.
dc.contributor.author del Peso, J.
dc.contributor.author Glasman, C.
dc.contributor.author Labarga, Luis
dc.contributor.author Llorente Merino, J.
dc.contributor.author Terron, J.
dc.contributor.other UAM. Departamento de Física Teórica es_ES
dc.date.accessioned 2015-02-05T12:37:12Z
dc.date.available 2015-02-05T12:37:12Z
dc.date.issued 2013-03-13
dc.identifier.citation Journal of High Energy Physics 2013.3 (2013): 076 en_US
dc.identifier.issn 1126-6708 (print) es_ES
dc.identifier.issn 1029-8479 (online) es_ES
dc.identifier.uri http://hdl.handle.net/10486/663586
dc.description Journal of High Energy Physics 2013.3 (2013): 076 reproduced by permission of Scuola Internazionale Superiore di Studi Avanzati (SISSA) en_US
dc.description 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 en_US
dc.description.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 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 en_US
dc.format.extent 36 pag. es_ES
dc.format.mimetype application/pdf en
dc.language.iso eng en
dc.publisher Springer Verlag en_US
dc.publisher SISSA 2013 en_US
dc.relation.ispartof Journal of High Energy Physics en_US
dc.rights © SISSA 2013 en_US
dc.subject.other Hadron-hadron scattering es_ES
dc.title 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 es_ES
dc.type article es_ES
dc.subject.eciencia Física es_ES
dc.relation.publisherversion http://dx.doi.org/10.1007/JHEP03(2013)076 es_ES
dc.identifier.doi 10.1007/JHEP03(2013)076 es_ES
dc.identifier.publicationfirstpage 076 es_ES
dc.identifier.publicationissue 3 es_ES
dc.identifier.publicationlastpage 076 es_ES
dc.identifier.publicationvolume 2013 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion en
dc.rights.accessRights openAccess es_ES
dc.authorUAM Labarga Echeverría, Luis Alfonso (259926)
dc.authorUAM Barreiro Alonso, Fernando (259561)


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