Evidence for the associated production of a W boson and a top quark in ATLAS at root s=7 TeV

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F12%3A00202648" target="_blank" >RIV/68407700:21220/12:00202648 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21340/12:00202648 RIV/68407700:21260/12:00202648 RIV/68407700:21670/12:00202648 RIV/00216208:11320/12:10130667 RIV/61989592:15310/12:33142202
Result on the web
<a href="http://dx.doi.org/10.1016/j.physletb.2012.08.011" target="_blank" >http://dx.doi.org/10.1016/j.physletb.2012.08.011</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.physletb.2012.08.011" target="_blank" >10.1016/j.physletb.2012.08.011</a>

Result language
angličtina
Original language name
Evidence for the associated production of a W boson and a top quark in ATLAS at root s=7 TeV
Original language description
This Letter presents evidence for the associated production of a W boson and a top quark using 2.05 fb(-1) of pp collision data at root s = 7 TeV accumulated with the ATLAS detector at the LHC. The analysis is based on the selection of the dileptonic final states with events featuring two isolated leptons, electron or muon, with significant transverse missing momentum and at least one jet. An approach based on boosted decision trees has been developed to improve the discrimination of single top-quark Wtevents from background. A template fit to the final classifier distributions is performed to determine the cross-section. The result is incompatible with the background-only hypothesis at the 3.3 sigma level, the expected sensitivity assuming the Standard Model production rate being 3.4 sigma. The corresponding cross-section is determined and found to be sigma(wt) = 16.8 +/- 2.9 (stat) +/- 4.9 (syst) pb, in good agreement with the Standard Model expectation. From this result the CKM mat
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BF - Elementary particle theory and high energy physics
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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