Berg, Daniela

[["dc.bibliographiccitation.artnumber","40"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Journal of High Energy Physics"],["dc.bibliographiccitation.volume","2022"],["dc.contributor.author","Aad, G."],["dc.contributor.author","Abbott, B."],["dc.contributor.author","Abbott, D. C."],["dc.contributor.author","Abed Abud, A."],["dc.contributor.author","Abeling, K."],["dc.contributor.author","Abhayasinghe, D. K."],["dc.contributor.author","Abidi, S. H."],["dc.contributor.author","Abramowicz, H."],["dc.contributor.author","Abreu, H."],["dc.contributor.author","Achkar, B."],["dc.contributor.author","Albert, J."],["dc.contributor.author","Anthony, M. T."],["dc.contributor.author","Arnold, H."],["dc.contributor.author","Balaji, S."],["dc.contributor.author","Berge, D."],["dc.contributor.author","Chen, Y."],["dc.contributor.author","Degens, J."],["dc.contributor.author","Dreyer, T."],["dc.contributor.author","Falke, S."],["dc.contributor.author","Fournier, D."],["dc.contributor.author","Gao, Y."],["dc.contributor.author","Gao, Y. S."],["dc.contributor.author","Grosse-Knetter, J."],["dc.contributor.author","Guenther, J."],["dc.contributor.author","Harenberg, T."],["dc.contributor.author","Jakobs, K."],["dc.contributor.author","Jin, S."],["dc.contributor.author","Kim, E."],["dc.contributor.author","Kluth, S."],["dc.contributor.author","Krüger, H."],["dc.contributor.author","Kuhl, T."],["dc.contributor.author","Lai, S."],["dc.contributor.author","Lehmann, K."],["dc.contributor.author","Lehmann, N."],["dc.contributor.author","Li, H."],["dc.contributor.author","Li, H."],["dc.contributor.author","Li, H."],["dc.contributor.author","Li, J."],["dc.contributor.author","Li, K."],["dc.contributor.author","Li, X."],["dc.contributor.author","Li, Y."],["dc.contributor.author","Liu, B."],["dc.contributor.author","Lorenz, J."],["dc.contributor.author","Lu, M."],["dc.contributor.author","Lu, S."],["dc.contributor.author","Lutz, M. S."],["dc.contributor.author","Martinez, M."],["dc.contributor.author","Menke, S."],["dc.contributor.author","Meyer, C."],["dc.contributor.author","Morgenstern, S."],["dc.contributor.author","Mueller, J."],["dc.contributor.author","Mueller, R."],["dc.contributor.author","Quadt, A."],["dc.contributor.author","Rajagopalan, S."],["dc.contributor.author","Rave, S."],["dc.contributor.author","Schoening, A."],["dc.contributor.author","Schott, M."],["dc.contributor.author","Seitz, C."],["dc.contributor.author","Sen, S."],["dc.contributor.author","Sharma, S."],["dc.contributor.author","Wang, C."],["dc.contributor.author","Wang, C."],["dc.contributor.author","Wang, H."],["dc.contributor.author","Wang, J."],["dc.contributor.author","Wang, Y."],["dc.contributor.author","Weber, M. S."],["dc.contributor.author","Xu, T."],["dc.contributor.author","Xu, Y."],["dc.contributor.author","Zhang, B."],["dc.contributor.author","Zhang, J."],["dc.contributor.author","Zhang, K."],["dc.contributor.author","Zhang, M."],["dc.contributor.author","Zhao, Z."],["dc.contributor.author","Zhou, Y."],["dc.contributor.author","Zhu, C."],["dc.contributor.author","Zwalinski, L."],["dc.date.accessioned","2022-11-28T11:28:05Z"],["dc.date.available","2022-11-28T11:28:05Z"],["dc.date.issued","2022-11-09"],["dc.date.updated","2022-11-28T08:12:06Z"],["dc.description.abstract","A simultaneous measurement of the three components of the top-quark and top-antiquark polarisation vectors in t-channel single-top-quark production is presented. This analysis is based on data from proton–proton collisions at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 139 fb−1, collected with the ATLAS detector at the LHC. Selected events contain exactly one isolated electron or muon, large missing transverse momentum and exactly two jets, one being b-tagged. Stringent selection requirements are applied to discriminate t-channel single-top-quark events from the background contributions. The top-quark and top-antiquark polarisation vectors are measured from the distributions of the direction cosines of the charged-lepton momentum in the top-quark rest frame. The three components of the polarisation vector for the selected top-quark event sample are $P_{ x '} $ = 0.01 ± 0.18, $P_{y ′} $ = −0.029 ± 0.027, $P_{ z'} $ = 0.91 ± 0.10 and for the top-antiquark event sample they are $P_{ x '} $ = −0.02 ± 0.20, $P_{ y '} $ = −0.007 ± 0.051, $P_{ xz'} $ = 0.79 ± 0.16. Normalised differential cross-sections corrected to a fiducial region at the stable-particle level are presented as a function of the charged-lepton angles for top-quark and top-antiquark events inclusively and separately. These measurements are in agreement with Standard Model predictions. The angular differential cross-sections are used to derive bounds on the complex Wilson coefficient of the dimension-six $ \\mathcal{O_{tW} }$ \r\noperator in the framework of an effective field theory. The obtained bounds are $ C_{tW} $ ∈ [−0.9, 1.4] and $ C_{itW}$ ∈ [−0.8, 0.2], both at 95% confidence level."],["dc.identifier.citation","Journal of High Energy Physics. 2022 Nov 09;2022(11):40"],["dc.identifier.doi","10.1007/JHEP11(2022)040"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/117768"],["dc.language.iso","en"],["dc.publisher","Springer Berlin Heidelberg"],["dc.rights.holder","The Author(s)"],["dc.subject","Hadron-Hadron Scattering"],["dc.subject","Top Physics"],["dc.title","Measurement of the polarisation of single top quarks and antiquarks produced in the t-channel at $ \\sqrt{s} $ = 13 TeV and bounds on the tWb dipole operator from the ATLAS experiment"],["dc.type","journal_article"],["dspace.entity.type","Publication"]]