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Measurement of the inclusive cross-sections of single top-quark and top-antiquark t-channel production in pp collisions at root s=13 TeV with the ATLAS detector
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.ORCID-id: 0000-0002-8913-0981
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Rekke forfattare: 28512017 (engelsk)Inngår i: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, nr 4, artikkel-id 086Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A measurement of the t-channel single-top-quark and single-top-antiquark production cross-sections in the lepton+jets channel is presented, using 3.2 fb(-1) of proton-proton collision data at a centre-of-mass energy of 13 TeV, recorded with the ATLAS detector at the LHC in 2015. Events are selected by requiring one charged lepton (electron or muon), missing transverse momentum, and two jets with high transverse momentum, exactly one of which is required to be b-tagged. Using a binned maximum-likelihood fit to the discriminant distribution of a neural network, the cross-sections are determined to be sigma(tq) = 156 +/- 5 (stat.) +/- 27 (syst.) +/- 3 (lumi.) pb for single top-quark production and sigma((t) over barq) = 91 +/- 4 (stat.) +/- 18 (syst.) +/- 2 (lumi.) pb for single top-antiquark production, assuming a top-quark mass of 172.5 GeV. The cross-section ratio is measured to be R-t = sigma(tq) / sigma((t) over barq) = 1.72 +/- 0.09 (stat.) +/- 0.18 (syst.). All results are in agreement with Standard Model predictions.

sted, utgiver, år, opplag, sider
SPRINGER , 2017. nr 4, artikkel-id 086
Emneord [en]
Hadron-Hadron scattering (experiments)
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-219865DOI: 10.1007/JHEP04(2017)086ISI: 000399826200001Scopus ID: 2-s2.0-85018460675OAI: oai:DiVA.org:kth-219865DiVA, id: diva2:1165736
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QC 20171213

Tilgjengelig fra: 2017-12-13 Laget: 2017-12-13 Sist oppdatert: 2017-12-13bibliografisk kontrollert

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Lund-Jensen, BengtSidebo, P. EdvinStrandberg, Jonas

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