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
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...
| Príomhchruthaitheoirí: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Formáid: | Journal article |
| Teanga: | English |
| Foilsithe / Cruthaithe: |
2013
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| _version_ | 1826259984458973184 |
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| author | Aad, G Abajyan, T Abbott, B Abdallah, J Khalek, SA Abdelalim, A Abdinov, O Aben, R Abi, B Abolins, M AbouZeid, O Abramowicz, H Abreu, H Acharya, B Adamczyk, L Adams, D Addy, T Adelman, J Adomeit, S Adragna, P Adye, T Aefsky, S Aguilar-Saavedra, J Agustoni, M Aharrouche, M |
| author_facet | Aad, G Abajyan, T Abbott, B Abdallah, J Khalek, SA Abdelalim, A Abdinov, O Aben, R Abi, B Abolins, M AbouZeid, O Abramowicz, H Abreu, H Acharya, B Adamczyk, L Adams, D Addy, T Adelman, J Adomeit, S Adragna, P Adye, T Aefsky, S Aguilar-Saavedra, J Agustoni, M Aharrouche, M |
| author_sort | Aad, G |
| collection | OXFORD |
| description | 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. |
| first_indexed | 2024-03-06T18:58:28Z |
| format | Journal article |
| id | oxford-uuid:12b21d3a-2a8b-4126-9b2b-335bb0fd4324 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:58:28Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | oxford-uuid:12b21d3a-2a8b-4126-9b2b-335bb0fd43242022-03-26T10:09:20ZSearch 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 experimentJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:12b21d3a-2a8b-4126-9b2b-335bb0fd4324EnglishSymplectic Elements at Oxford2013Aad, GAbajyan, TAbbott, BAbdallah, JKhalek, SAAbdelalim, AAbdinov, OAben, RAbi, BAbolins, MAbouZeid, OAbramowicz, HAbreu, HAcharya, BAdamczyk, LAdams, DAddy, TAdelman, JAdomeit, SAdragna, PAdye, TAefsky, SAguilar-Saavedra, JAgustoni, MAharrouche, MIn 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. |
| spellingShingle | Aad, G Abajyan, T Abbott, B Abdallah, J Khalek, SA Abdelalim, A Abdinov, O Aben, R Abi, B Abolins, M AbouZeid, O Abramowicz, H Abreu, H Acharya, B Adamczyk, L Adams, D Addy, T Adelman, J Adomeit, S Adragna, P Adye, T Aefsky, S Aguilar-Saavedra, J Agustoni, M Aharrouche, M 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 |
| 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 |
| title_full | 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 |
| title_fullStr | 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 |
| title_full_unstemmed | 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 |
| title_short | 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 |
| title_sort | 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 |
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