Evidence for the associated production of a W boson and a top quark in ATLAS
In proton collisions at the LHC, top quarks can be produced in pairs via the strong interaction and individually via the weak interaction. The weak interaction production can be subdivided into three channels: the t-channel, the s-channel and the associated production of a W boson and a top quark. T...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2013-11-01
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| Series: | EPJ Web of Conferences |
| Online Access: | http://dx.doi.org/10.1051/epjconf/20136020005 |
| _version_ | 1818563494090375168 |
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| author | Stillings Jan A. |
| author_facet | Stillings Jan A. |
| author_sort | Stillings Jan A. |
| collection | DOAJ |
| description | In proton collisions at the LHC, top quarks can be produced in pairs via the strong interaction and individually via the weak interaction. The weak interaction production can be subdivided into three channels: the t-channel, the s-channel and the associated production of a W boson and a top quark. The total production cross-section of these three channels is about one third of the total top quark production cross-section. The t-channel is dominant and has been measured both at the Tevatron and the LHC. However, the Wt associated production has not yet been observed. Different final states can be used to isolate the associated Wt production from background processes, depending on the decay modes of the two W bosons. The channel with two leptons is analysed by ATLAS to present evidence for Wt associated production at √s = 7 TeV. The measurement uses a boosted decision tree to separate signal from background. |
| first_indexed | 2024-12-14T01:17:15Z |
| format | Article |
| id | doaj.art-b00f8ed130404087aff561525c9820e3 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-14T01:17:15Z |
| publishDate | 2013-11-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-b00f8ed130404087aff561525c9820e32022-12-21T23:22:33ZengEDP SciencesEPJ Web of Conferences2100-014X2013-11-01602000510.1051/epjconf/20136020005Evidence for the associated production of a W boson and a top quark in ATLASStillings Jan A.In proton collisions at the LHC, top quarks can be produced in pairs via the strong interaction and individually via the weak interaction. The weak interaction production can be subdivided into three channels: the t-channel, the s-channel and the associated production of a W boson and a top quark. The total production cross-section of these three channels is about one third of the total top quark production cross-section. The t-channel is dominant and has been measured both at the Tevatron and the LHC. However, the Wt associated production has not yet been observed. Different final states can be used to isolate the associated Wt production from background processes, depending on the decay modes of the two W bosons. The channel with two leptons is analysed by ATLAS to present evidence for Wt associated production at √s = 7 TeV. The measurement uses a boosted decision tree to separate signal from background.http://dx.doi.org/10.1051/epjconf/20136020005 |
| spellingShingle | Stillings Jan A. Evidence for the associated production of a W boson and a top quark in ATLAS EPJ Web of Conferences |
| title | Evidence for the associated production of a W boson and a top quark in ATLAS |
| title_full | Evidence for the associated production of a W boson and a top quark in ATLAS |
| title_fullStr | Evidence for the associated production of a W boson and a top quark in ATLAS |
| title_full_unstemmed | Evidence for the associated production of a W boson and a top quark in ATLAS |
| title_short | Evidence for the associated production of a W boson and a top quark in ATLAS |
| title_sort | evidence for the associated production of a w boson and a top quark in atlas |
| url | http://dx.doi.org/10.1051/epjconf/20136020005 |
| work_keys_str_mv | AT stillingsjana evidencefortheassociatedproductionofawbosonandatopquarkinatlas |