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Probing the W tb vertex structure in t-channel single-top-quark production and decay in pp collisions at s=8 TeV with the ATLAS detector

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ATLAS Collaboration (Including: Beckingham, M., Ennis, Joseph Stanford, Farrington, Sinead, Harrison, P. F., Jeske, C., Jones, G. (Graham), Martin, T. A., Murray, W., Pianori, E. and Spangenberg, Martin). (2017) Probing the W tb vertex structure in t-channel single-top-quark production and decay in pp collisions at s=8 TeV with the ATLAS detector. Journal of High Energy Physics, 2017 (4). 124. doi:10.1007/jhep04(2017)124

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Abstract

To probe the W tb vertex structure, top-quark and W -boson polarisation observables are measured from t-channel single-top-quark events produced in proton-proton collisions at a centre-of-mass energy of 8 TeV. The dataset corresponds to an integrated luminosity of 20.2 fb−1, recorded with the ATLAS detector at the LHC. Selected events contain one isolated electron or muon, large missing transverse momentum and exactly two jets, with one of them identified as likely to contain a b-hadron. Stringent selection requirements are applied to discriminate t-channel single-top-quark events from background. The polarisation observables are extracted from asymmetries in angular distributions measured with respect to spin quantisation axes appropriately chosen for the top quark and the W boson. The asymmetry measurements are performed at parton level by correcting the observed angular distributions for detector effects and hadronisation after subtracting the background contributions. The measured top-quark and W -boson polarisation values are in agreement with the Standard Model predictions. Limits on the imaginary part of the anomalous coupling gR are also set from model-independent measurements.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
SWORD Depositor: Library Publications Router
Library of Congress Subject Headings (LCSH): Hadrons -- Scattering, Particles (Nuclear physics), Quarks, Bosons
Journal or Publication Title: Journal of High Energy Physics
Publisher: Springer Berlin Heidelberg
ISSN: 1029-8479
Official Date: 20 April 2017
Dates:
DateEvent
20 April 2017Published
7 April 2017Accepted
Volume: 2017
Number: 4
Article Number: 124
DOI: 10.1007/jhep04(2017)124
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIEDCERNhttp://dx.doi.org/10.13039/100012470
UNSPECIFIEDAgencia Nacional de Promoción Científica y Tecnológicahttp://dx.doi.org/10.13039/501100003074
UNSPECIFIEDErevanskij Fizičeskij Instituthttp://viaf.org/viaf/138989470
UNSPECIFIED[ARC] Australian Research Councilhttp://dx.doi.org/10.13039/501100000923
UNSPECIFIEDBundesministerium für Wissenschaft, Forschung und Wirtschafthttp://dx.doi.org/10.13039/501100003413
UNSPECIFIEDAustrian Science Fundhttp://dx.doi.org/10.13039/501100002428
UNSPECIFIEDAzärbaycan Milli Elmlär Akademiyasıhttp://viaf.org/viaf/168770251
UNSPECIFIEDBelarus. Gosudarstvennyĭ komitet po nauke i tekhnologii︠a︡mhttp://viaf.org/viaf/154732294
UNSPECIFIEDConselho Nacional de Desenvolvimento Científico e Tecnológicohttp://dx.doi.org/10.13039/501100003593
UNSPECIFIEDFundação de Amparo à Pesquisa do Estado de São Paulohttp://dx.doi.org/10.13039/501100001807
UNSPECIFIED[NSERC] Natural Sciences and Engineering Research Council of Canadahttp://dx.doi.org/10.13039/501100000038
UNSPECIFIED[NRC] National Research Council Canadahttp://dx.doi.org/10.13039/501100000046
UNSPECIFIED[CFI] Canada Foundation for Innovationhttp://dx.doi.org/10.13039/501100000196
UNSPECIFIED[CONICYT] Comisión Nacional de Investigación Científica y Tecnológicahttp://dx.doi.org/10.13039/501100002848
UNSPECIFIED[CAS] Chinese Academy of Scienceshttp://dx.doi.org/10.13039/501100002367
UNSPECIFIED[MSTPRC] Ministry of Science and Technology of the People's Republic of Chinahttp://dx.doi.org/10.13039/501100002855
UNSPECIFIED[NSFC] National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809
UNSPECIFIEDDepartamento Administrativo de Ciencia, Tecnología e Innovaciónhttp://dx.doi.org/10.13039/100007637
UNSPECIFIEDMinisterstvo Školství, Mládeže a Tělovýchovyhttp://dx.doi.org/10.13039/501100001823
UNSPECIFIEDMinisterstvo Průmyslu a Obchoduhttp://dx.doi.org/10.13039/501100004578
UNSPECIFIEDVienna Scientific ClusterUNSPECIFIED
UNSPECIFIEDDanmarks Grundforskningsfondhttp://dx.doi.org/10.13039/501100001732
UNSPECIFIEDNatur og Univers, Det Frie Forskningsrådhttp://dx.doi.org/10.13039/100008394
UNSPECIFIED[IN2P3] Institut national de physique nucléaire et de physique des particuleshttp://viaf.org/viaf/137207166
UNSPECIFIED[CNRS] Centre National de la Recherche Scientifiquehttp://dx.doi.org/10.13039/501100004794
UNSPECIFIED[CEA] Commissariat à l'Énergie Atomique et aux Énergies Alternativeshttp://dx.doi.org/10.13039/501100006489
UNSPECIFIEDInstitut de recherche sur les lois fondamentales de l'universUNSPECIFIED
UNSPECIFIEDShota Rustaveli National Science Foundationhttp://dx.doi.org/10.13039/501100004801
UNSPECIFIEDBundesministerium für Bildung und Forschunghttp://dx.doi.org/10.13039/501100002347
UNSPECIFIEDHelmholtz-Gemeinschafthttp://dx.doi.org/10.13039/501100001656
UNSPECIFIEDMax-Planck-Gesellschafthttp://dx.doi.org/10.13039/501100004189
UNSPECIFIED[JSPS] Japan Society for the Promotion of Sciencehttp://dx.doi.org/10.13039/501100001691
UNSPECIFIEDResearch Grants Council, University Grants Committeehttp://dx.doi.org/10.13039/501100002920
UNSPECIFIEDIsrael Science Foundationhttp://dx.doi.org/10.13039/501100003977
UNSPECIFIEDI-CORE, Israeli Centers of Research Excellencehttp://viaf.org/viaf/311794638
UNSPECIFIEDWeizmann Institute of Sciencehttp://dx.doi.org/10.13039/501100001735
UNSPECIFIED[INFN] Instituto Nazionale di Fisica Nuclearehttp://dx.doi.org/10.13039/501100004007
UNSPECIFIED[MEXT] Ministry of Education, Culture, Sports, Science and Technologyhttp://dx.doi.org/10.13039/501100001700
UNSPECIFIED[JSPS] Japan Society for the Promotion of Sciencehttp://dx.doi.org/10.13039/501100001691
UNSPECIFIEDCentre National pour la Recherche Scientifique et Techniquehttp://dx.doi.org/10.13039/501100006319
UNSPECIFIED[NWO] Nederlandse Organisatie voor Wetenschappelijk Onderzoekhttp://dx.doi.org/10.13039/501100003246
UNSPECIFIEDNorges Forskningsrådhttp://dx.doi.org/10.13039/501100005416
UNSPECIFIEDMinisterstwo Nauki i Szkolnictwa Wyższegohttp://dx.doi.org/10.13039/501100004569
UNSPECIFIEDNarodowe Centrum Naukihttp://dx.doi.org/10.13039/501100004281
UNSPECIFIEDFundação para a Ciência e a Tecnologiahttp://dx.doi.org/10.13039/501100001871
UNSPECIFIEDInstitutul de Fizică Atomicăhttp://viaf.org/viaf/154740159
UNSPECIFIED[MES] Ministry of Education and Science of the Russian Federationhttp://dx.doi.org/10.13039/501100003443
UNSPECIFIEDNat︠s︡ionalʹnyĭ issledovatelʹskiĭ t︠s︡entr "Kurchatovskiĭ institut"http://viaf.org/viaf/125146937704813830418
UNSPECIFIEDJoint Institute for Nuclear Researchhttp://dx.doi.org/10.13039/501100003822
UNSPECIFIEDMinistarstvo Prosvete, Nauke i Tehnološkog Razvojahttp://dx.doi.org/10.13039/501100004564
UNSPECIFIEDMinisterstvo spravodlivostiUNSPECIFIED
UNSPECIFIEDJavna Agencija za Raziskovalno Dejavnost RShttp://dx.doi.org/10.13039/501100004329
UNSPECIFIEDDepartment of Science and Technology, Republic of South Africahttp://dx.doi.org/10.13039/501100001342
UNSPECIFIEDNational Research Foundation (South Africa)http://viaf.org/viaf/137694659
UNSPECIFIED[MINECO] Ministerio de Economía y Competitividadhttp://dx.doi.org/10.13039/501100003329
UNSPECIFIEDVetenskapsrådethttp://dx.doi.org/10.13039/501100004359
UNSPECIFIEDKnut och Alice Wallenbergs Stiftelsehttp://dx.doi.org/10.13039/501100004063
UNSPECIFIED[SERI] Staatssekretariat für Bildung, Forschung und Innovationhttp://dx.doi.org/10.13039/501100007352
UNSPECIFIED[SNSF] Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschunghttp://dx.doi.org/10.13039/501100001711
UNSPECIFIEDCantons of Bern and Geneva, SwitzerlandUNSPECIFIED
UNSPECIFIEDMinistry of Science and Technology, Taiwanhttp://dx.doi.org/10.13039/501100004663
UNSPECIFIEDTürkiye Atom Enerjisi Kurumuhttp://dx.doi.org/10.13039/100010440
UNSPECIFIED[STFC] Science and Technology Facilities Councilhttp://dx.doi.org/10.13039/501100000271
UNSPECIFIED[DOE] U.S. Department of Energyhttp://dx.doi.org/10.13039/100000015
UNSPECIFIEDNational Science Foundationhttp://dx.doi.org/10.13039/100000001
UNSPECIFIEDBritish Columbia Knowledge Development Fundhttp://dx.doi.org/10.13039/501100007711
UNSPECIFIEDCanariehttp://dx.doi.org/10.13039/100008313
UNSPECIFIEDCompute Canadahttp://dx.doi.org/10.13039/100013020
UNSPECIFIEDFonds Québécois de la Recherche sur la Nature et les Technologieshttp://dx.doi.org/10.13039/501100003150
UNSPECIFIEDOntario Innovation Trusthttp://dx.doi.org/10.13039/100008185
EPLANETEuropean Commissionhttp://dx.doi.org/10.13039/501100000780
UNSPECIFIEDEuropean Research Council http://viaf.org/viaf/130022607
UNSPECIFIED[ERDF] European Regional Development Fundhttp://dx.doi.org/10.13039/501100008530
UNSPECIFIEDSeventh Framework Programmehttp://dx.doi.org/10.13039/100011102
UNSPECIFIEDH2020 European Research Councilhttp://dx.doi.org/10.13039/100010663
UNSPECIFIEDH2020 Marie Skłodowska-Curie Actionshttp://dx.doi.org/10.13039/100010665
UNSPECIFIEDInvestissements d'Avenir Labex and IdexUNSPECIFIED
UNSPECIFIED[ANR] Agence Nationale de la Recherchehttp://dx.doi.org/10.13039/501100001665
UNSPECIFIEDRégion Auvergne and Fondation Partager le SavoirUNSPECIFIED
UNSPECIFIED[DFG] Deutsche Forschungsgemeinschafthttp://dx.doi.org/10.13039/501100001659
UNSPECIFIEDAlexander von Humboldt-Stiftunghttp://dx.doi.org/10.13039/100005156
UNSPECIFIEDEuropean Social Fundhttp://dx.doi.org/10.13039/501100004895
National Strategic Reference Framework (NSRF)European Commissionhttp://dx.doi.org/10.13039/501100000780
UNSPECIFIEDUnited States-Israel Binational Science Foundationhttp://dx.doi.org/10.13039/501100001742
UNSPECIFIEDGerman-Israeli Foundation for Scientific Research and Developmenthttp://dx.doi.org/10.13039/501100001736
UNSPECIFIEDMinerva Foundationhttp://dx.doi.org/10.13039/501100001658
UNSPECIFIEDGeneralitat de Catalunyahttp://dx.doi.org/10.13039/501100002809
UNSPECIFIEDGeneralitat Valencianahttp://dx.doi.org/10.13039/501100003359
UNSPECIFIED[RS] Royal Societyhttp://dx.doi.org/10.13039/501100000288
UNSPECIFIEDLeverhulme Trusthttp://dx.doi.org/10.13039/501100000275

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