Search for s-channel single top-quark production in proton-proton collisions at √s=8 TeV with the ATLAS detector
This Letter presents a search at the LHC for s-channel single top-quark production in proton-proton collisions at a centre-of-mass energy of 8 TeV. The analyzed data set was recorded by the ATLAS detector and corresponds to an integrated luminosity of 20.3 fb -1 . Selected events contain one charged...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03702693_v740_n_p118_Aad |
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todo:paper_03702693_v740_n_p118_Aad2023-10-03T15:29:36Z Search for s-channel single top-quark production in proton-proton collisions at √s=8 TeV with the ATLAS detector Aad, G. ATLAS Electroweak production S-Channel Top-quark This Letter presents a search at the LHC for s-channel single top-quark production in proton-proton collisions at a centre-of-mass energy of 8 TeV. The analyzed data set was recorded by the ATLAS detector and corresponds to an integrated luminosity of 20.3 fb -1 . Selected events contain one charged lepton, large missing transverse momentum and exactly two b-tagged jets. A multivariate event classifier based on boosted decision trees is developed to discriminate s-channel single top-quark events from the main background contributions. The signal extraction is based on a binned maximum-likelihood fit of the output classifier distribution. The analysis leads to an upper limit on the s-channel single top-quark production cross-section of 14.6 pb at the 95% confidence level. The fit gives a cross-section of σ s = 5.0 ± 4.3 pb, consistent with the Standard Model expectation. © 2014 The Authors. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03702693_v740_n_p118_Aad |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
ATLAS Electroweak production S-Channel Top-quark |
| spellingShingle |
ATLAS Electroweak production S-Channel Top-quark Aad, G. Search for s-channel single top-quark production in proton-proton collisions at √s=8 TeV with the ATLAS detector |
| topic_facet |
ATLAS Electroweak production S-Channel Top-quark |
| description |
This Letter presents a search at the LHC for s-channel single top-quark production in proton-proton collisions at a centre-of-mass energy of 8 TeV. The analyzed data set was recorded by the ATLAS detector and corresponds to an integrated luminosity of 20.3 fb -1 . Selected events contain one charged lepton, large missing transverse momentum and exactly two b-tagged jets. A multivariate event classifier based on boosted decision trees is developed to discriminate s-channel single top-quark events from the main background contributions. The signal extraction is based on a binned maximum-likelihood fit of the output classifier distribution. The analysis leads to an upper limit on the s-channel single top-quark production cross-section of 14.6 pb at the 95% confidence level. The fit gives a cross-section of σ s = 5.0 ± 4.3 pb, consistent with the Standard Model expectation. © 2014 The Authors. |
| format |
JOUR |
| author |
Aad, G. |
| author_facet |
Aad, G. |
| author_sort |
Aad, G. |
| title |
Search for s-channel single top-quark production in proton-proton collisions at √s=8 TeV with the ATLAS detector |
| title_short |
Search for s-channel single top-quark production in proton-proton collisions at √s=8 TeV with the ATLAS detector |
| title_full |
Search for s-channel single top-quark production in proton-proton collisions at √s=8 TeV with the ATLAS detector |
| title_fullStr |
Search for s-channel single top-quark production in proton-proton collisions at √s=8 TeV with the ATLAS detector |
| title_full_unstemmed |
Search for s-channel single top-quark production in proton-proton collisions at √s=8 TeV with the ATLAS detector |
| title_sort |
search for s-channel single top-quark production in proton-proton collisions at √s=8 tev with the atlas detector |
| url |
http://hdl.handle.net/20.500.12110/paper_03702693_v740_n_p118_Aad |
| work_keys_str_mv |
AT aadg searchforschannelsingletopquarkproductioninprotonprotoncollisionsats8tevwiththeatlasdetector |
| _version_ |
1807316852527857664 |