Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector
A search for the associated production of the Higgs boson with a top quark pair is performed in multilepton final states using 20.3 fb −1 of proton–proton collision data recorded by the ATLAS experiment at s=8 TeV at the Large Hadron Collider. Five final states, targeting the decays H→WW ⁎ , ττ, and...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03702693_v749_n_p519_Aad |
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todo:paper_03702693_v749_n_p519_Aad2023-10-03T15:29:39Z Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector Aad, G. A search for the associated production of the Higgs boson with a top quark pair is performed in multilepton final states using 20.3 fb −1 of proton–proton collision data recorded by the ATLAS experiment at s=8 TeV at the Large Hadron Collider. Five final states, targeting the decays H→WW ⁎ , ττ, and ZZ ⁎ , are examined for the presence of the Standard Model (SM) Higgs boson: two same-charge light leptons (e or μ) without a hadronically decaying τ lepton; three light leptons; two same-charge light leptons with a hadronically decaying τ lepton; four light leptons; and one light lepton and two hadronically decaying τ leptons. No significant excess of events is observed above the background expectation. The best fit for the tt¯H production cross section, assuming a Higgs boson mass of 125 GeV, is 2.1 −1.2 +1.4 times the SM expectation, and the observed (expected) upper limit at the 95% confidence level is 4.7 (2.4) times the SM rate. The p-value for compatibility with the background-only hypothesis is 1.8σ; the expectation in the presence of a Standard Model signal is 0.9σ. © 2015 CERN for the benefit of the ATLAS Collaboration. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03702693_v749_n_p519_Aad |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
A search for the associated production of the Higgs boson with a top quark pair is performed in multilepton final states using 20.3 fb −1 of proton–proton collision data recorded by the ATLAS experiment at s=8 TeV at the Large Hadron Collider. Five final states, targeting the decays H→WW ⁎ , ττ, and ZZ ⁎ , are examined for the presence of the Standard Model (SM) Higgs boson: two same-charge light leptons (e or μ) without a hadronically decaying τ lepton; three light leptons; two same-charge light leptons with a hadronically decaying τ lepton; four light leptons; and one light lepton and two hadronically decaying τ leptons. No significant excess of events is observed above the background expectation. The best fit for the tt¯H production cross section, assuming a Higgs boson mass of 125 GeV, is 2.1 −1.2 +1.4 times the SM expectation, and the observed (expected) upper limit at the 95% confidence level is 4.7 (2.4) times the SM rate. The p-value for compatibility with the background-only hypothesis is 1.8σ; the expectation in the presence of a Standard Model signal is 0.9σ. © 2015 CERN for the benefit of the ATLAS Collaboration. |
| format |
JOUR |
| author |
Aad, G. |
| spellingShingle |
Aad, G. Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector |
| author_facet |
Aad, G. |
| author_sort |
Aad, G. |
| title |
Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector |
| title_short |
Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector |
| title_full |
Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector |
| title_fullStr |
Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector |
| title_full_unstemmed |
Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector |
| title_sort |
search for the associated production of the higgs boson with a top quark pair in multilepton final states with the atlas detector |
| url |
http://hdl.handle.net/20.500.12110/paper_03702693_v749_n_p519_Aad |
| work_keys_str_mv |
AT aadg searchfortheassociatedproductionofthehiggsbosonwithatopquarkpairinmultileptonfinalstateswiththeatlasdetector |
| _version_ |
1807317982318166016 |