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Measurement of the production cross-section of a single top quark in association with a W boson at 8 TeV with the ATLAS experiment
dc.contributor | ATLAS Collaboration | |
dc.creator | Aad, G. | |
dc.creator | Abbott, B. | |
dc.creator | Abdallah, J. | |
dc.creator | Agatonović-Jovin, Tatjana | |
dc.creator | Bogavac, D. | |
dc.creator | Bozic, I. | |
dc.creator | Dimitrievska, A. | |
dc.creator | Krstic, J. | |
dc.creator | Marjanovic, M. | |
dc.creator | Popovic, D. | |
dc.creator | Sijacki, Dj. | |
dc.creator | Simic, Lj. | |
dc.creator | Vranjes, N. | |
dc.creator | Vranjes Milosavljevic, M. | |
dc.creator | Živković, L. | |
dc.date.accessioned | 2023-10-31T13:11:44Z | |
dc.date.available | 2023-10-31T13:11:44Z | |
dc.date.issued | 2016 | |
dc.identifier.issn | 1126-6708 | |
dc.identifier.uri | https://vinar.vin.bg.ac.rs/handle/123456789/11845 | |
dc.description.abstract | The cross-section for the production of a single top quark in association with a W boson in proton-proton collisions at √s = 8TeV is measured. The dataset corresponds to an integrated luminosity of 20.3 fb−1, collected by the ATLAS detector in 2012 at the Large Hadron Collider at CERN. Events containing two leptons and one central b-jet are selected. The W t signal is separated from the backgrounds using boosted decision trees, each of which combines a number of discriminating variables into one classifier. Production of W t events is observed with a significance of 7.7σ. The cross-section is extracted in a profile likelihood fit to the classifier output distributions. The W t cross-section, inclusive of decay modes, is measured to be 23.0 ± 1.3(stat.)− 3.5 + 3.2(syst.)±1.1(lumi.) pb. The measured cross-section is used to extract a value for the CKM matrix element |Vtb| of 1.01 ± 0.10 and a lower limit of 0.80 at the 95% confidence level. The cross-section for the production of a top quark and a W boson is also measured in a fiducial acceptance requiring two leptons with pT> 25 GeV and |η| < 2.5, one jet with pT> 20 GeV and |η| < 2.5, and ET miss > 20 GeV, including both W t and top-quark pair events as signal. The measured value of the fiducial cross-section is 0.85 ± 0.01(stat.)− 0.07 + 0.07(syst.)±0.03(lumi.) pb. | en |
dc.language.iso | en | |
dc.rights | openAccess | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.source | Journal of High Energy Physics | |
dc.title | Measurement of the production cross-section of a single top quark in association with a W boson at 8 TeV with the ATLAS experiment | en |
dc.type | article | en |
dc.rights.license | BY | |
dc.citation.issue | 1 | |
dc.citation.spage | 64 | |
dc.identifier.wos | 000368174800001 | |
dc.identifier.doi | 10.1007/JHEP01(2016)064 | |
dc.contributor.count | ATLAS Collaboration (ukupan broj autora: 2871) | |
dc.type.version | publishedVersion | |
dc.identifier.scopus | 2-s2.0-84971238686 | |
dc.identifier.fulltext | http://vinar.vin.bg.ac.rs/bitstream/id/32456/JHEP01(2016)064.pdf |