Search for charged Higgs bosons through the violation of lepton universality in t[bar over t] events using pp collision data at √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 [superscript +], t → bH [superscript +], in addition to the Standard Model decay t → bW. Since W bosons decay to the three lepton generations equally, while H [superscript +] ma...
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| Format: | Article |
| Language: | en_US |
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Springer-Verlag
2014
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| Online Access: | http://hdl.handle.net/1721.1/86146 https://orcid.org/0000-0002-7586-7253 |
| _version_ | 1811080296323350528 |
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| author | Taylor, Frank E. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Taylor, Frank E. |
| author_sort | Taylor, Frank E. |
| collection | MIT |
| description | In several extensions of the Standard Model, the top quark can decay into a bottom quark and a light charged Higgs boson H [superscript +], t → bH [superscript +], in addition to the Standard Model decay t → bW. Since W bosons decay to the three lepton generations equally, while H [superscript +] 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[superscript −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 [subscript had]) are used. Event yield ratios between e + τ [subscript had] and e + μ, as well as between μ + τ [subscript 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 [superscript +] → τν) is 100%, upper limits in the range 3.2%–4.4% can be placed on the branching fraction B (t → bH [superscript +]) for charged Higgs boson masses m [subscript H+] in the range 90–140 GeV. After combination with results from a search for charged Higgs bosons in t[bar over t] decays using the τ [subscript had] + jets final state, upper limits on B (t → bH [superscript +]) can be set in the range 0.8%–3.4%, for m [subscript H+] in the range 90-160 GeV. |
| first_indexed | 2024-09-23T11:28:57Z |
| format | Article |
| id | mit-1721.1/86146 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:28:57Z |
| publishDate | 2014 |
| publisher | Springer-Verlag |
| record_format | dspace |
| spelling | mit-1721.1/861462022-09-27T19:50:15Z Search for charged Higgs bosons through the violation of lepton universality in t[bar over t] events using pp collision data at √s = 7 TeV with the ATLAS experiment Taylor, Frank E. Massachusetts Institute of Technology. Department of Physics Taylor, Frank E. In several extensions of the Standard Model, the top quark can decay into a bottom quark and a light charged Higgs boson H [superscript +], t → bH [superscript +], in addition to the Standard Model decay t → bW. Since W bosons decay to the three lepton generations equally, while H [superscript +] 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[superscript −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 [subscript had]) are used. Event yield ratios between e + τ [subscript had] and e + μ, as well as between μ + τ [subscript 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 [superscript +] → τν) is 100%, upper limits in the range 3.2%–4.4% can be placed on the branching fraction B (t → bH [superscript +]) for charged Higgs boson masses m [subscript H+] in the range 90–140 GeV. After combination with results from a search for charged Higgs bosons in t[bar over t] decays using the τ [subscript had] + jets final state, upper limits on B (t → bH [superscript +]) can be set in the range 0.8%–3.4%, for m [subscript H+] in the range 90-160 GeV. United States. Dept. of Energy National Science Foundation (U.S.) Brookhaven National Laboratory 2014-04-14T15:45:53Z 2014-04-14T15:45:53Z 2013-03 2013-02 Article http://purl.org/eprint/type/JournalArticle 1029-8479 1126-6708 http://hdl.handle.net/1721.1/86146 Aad, G., T. Abajyan, B. Abbott, J. Abdallah, S. Abdel Khalek, A. A. Abdelalim, O. Abdinov, et al. “Search for Charged Higgs Bosons through the Violation of Lepton Universality in t[bar over t] events using pp collision data at √s = 7 TeV with the ATLAS Experiment.” J. High Energ. Phys. 2013, no. 3 (March 2013). © CERN, for the benefit of the ATLAS collaboration https://orcid.org/0000-0002-7586-7253 en_US http://dx.doi.org/10.1007/jhep03(2013)076 Journal of High Energy Physics Creative Commons Attribution http://creativecommons.org/licenses/by/3.0/ application/pdf Springer-Verlag Springer |
| spellingShingle | Taylor, Frank E. Search for charged Higgs bosons through the violation of lepton universality in t[bar over t] events using pp collision data at √s = 7 TeV with the ATLAS experiment |
| title | Search for charged Higgs bosons through the violation of lepton universality in t[bar over t] events using pp collision data at √s = 7 TeV with the ATLAS experiment |
| title_full | Search for charged Higgs bosons through the violation of lepton universality in t[bar over t] events using pp collision data at √s = 7 TeV with the ATLAS experiment |
| title_fullStr | Search for charged Higgs bosons through the violation of lepton universality in t[bar over t] events using pp collision data at √s = 7 TeV with the ATLAS experiment |
| title_full_unstemmed | Search for charged Higgs bosons through the violation of lepton universality in t[bar over t] events using pp collision data at √s = 7 TeV with the ATLAS experiment |
| title_short | Search for charged Higgs bosons through the violation of lepton universality in t[bar over t] events using pp collision data at √s = 7 TeV with the ATLAS experiment |
| title_sort | search for charged higgs bosons through the violation of lepton universality in t bar over t events using pp collision data at √s 7 tev with the atlas experiment |
| url | http://hdl.handle.net/1721.1/86146 https://orcid.org/0000-0002-7586-7253 |
| work_keys_str_mv | AT taylorfranke searchforchargedhiggsbosonsthroughtheviolationofleptonuniversalityintbaroverteventsusingppcollisiondataats7tevwiththeatlasexperiment |