Mostrar el registro sencillo del ítem
Measurement of the polarisation of single top quarks and antiquarks produced in the t-channel at s√ = 13 TeV and bounds on the tWb dipole operator from the ATLAS experiment
dc.contributor.author | Aad, G. | |
dc.contributor.author | Aguilar Saavedra, Juan Antonio | |
dc.contributor.author | Rodríguez Chala, Mikael | |
dc.contributor.author | Atlas Collaboration | |
dc.date.accessioned | 2022-12-13T12:12:24Z | |
dc.date.available | 2022-12-13T12:12:24Z | |
dc.date.issued | 2022-11-09 | |
dc.identifier.citation | The ATLAS collaboration... [et al.]. Measurement of the polarisation of single top quarks and antiquarks produced in the t-channel at s√ = 13 TeV and bounds on the tWb dipole operator from the ATLAS experiment. J. High Energ. Phys. 2022, 40 (2022). [https://doi.org/10.1007/JHEP11(2022)040] | es_ES |
dc.identifier.uri | https://hdl.handle.net/10481/78425 | |
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-z' = -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 O-tW operator in the framework of an effective field theory. The obtained bounds are C-tW is an element of[-0.9, 1.4] and C-itW is an element of [-0.8, 0.2], both at 95% confidence level. | es_ES |
dc.description.sponsorship | ANPCyT, Argentina | es_ES |
dc.description.sponsorship | YerPhI, Armenia | es_ES |
dc.description.sponsorship | ARC, Australia | es_ES |
dc.description.sponsorship | BMWFW and FWF, Austria | es_ES |
dc.description.sponsorship | ANAS, Azerbaijan | es_ES |
dc.description.sponsorship | SSTC, Belarus | es_ES |
dc.description.sponsorship | CNPq and FAPESP, Brazil | es_ES |
dc.description.sponsorship | NSERC, NRC and CFI, Canada | es_ES |
dc.description.sponsorship | CERN | es_ES |
dc.description.sponsorship | ANID, Chile | es_ES |
dc.description.sponsorship | CAS, MOST and NSFC, China | es_ES |
dc.description.sponsorship | Minciencias, Colombia | es_ES |
dc.description.sponsorship | MEYS CR, Czech Republic | es_ES |
dc.description.sponsorship | DNRF and DNSRC, Denmark | es_ES |
dc.description.sponsorship | IN2P3-CNRS and CEA-DRF/IRFU, France | es_ES |
dc.description.sponsorship | SRNSFG, Georgia | es_ES |
dc.description.sponsorship | BMBF, HGF and MPG, Germany | es_ES |
dc.description.sponsorship | GSRI, Greece | es_ES |
dc.description.sponsorship | RGC and Hong Kong SAR, China | es_ES |
dc.description.sponsorship | ISF and Benoziyo Center, Israel | es_ES |
dc.description.sponsorship | INFN, Italy | es_ES |
dc.description.sponsorship | MEXT and JSPS, Japan | es_ES |
dc.description.sponsorship | CNRST, Morocco | es_ES |
dc.description.sponsorship | NWO, Netherlands | es_ES |
dc.description.sponsorship | RCN, Norway | es_ES |
dc.description.sponsorship | MEiN, Poland | es_ES |
dc.description.sponsorship | FCT, Portuga | es_ES |
dc.description.sponsorship | MNE/IFA, Romania | es_ES |
dc.description.sponsorship | JINR | es_ES |
dc.description.sponsorship | MES of Russia and NRC KI, Russian Federation | es_ES |
dc.description.sponsorship | MESTD, Serbia | es_ES |
dc.description.sponsorship | MSSR, Slovakia | es_ES |
dc.description.sponsorship | ARRS and MIZŠ, Slovenia | es_ES |
dc.description.sponsorship | DSI/NRF, South Africa | es_ES |
dc.description.sponsorship | MICINN, Spain | es_ES |
dc.description.sponsorship | SRC and Wallenberg Foundation, Sweden | es_ES |
dc.description.sponsorship | SERI, SNSF and Cantons of Bern and Geneva, Switzerland | es_ES |
dc.description.sponsorship | MOST, Taiwan | es_ES |
dc.description.sponsorship | TAEK, Turkey | es_ES |
dc.description.sponsorship | STFC, United Kingdom | es_ES |
dc.description.sponsorship | DOE and NSF, United States of America | es_ES |
dc.description.sponsorship | BCKDF, CANARIE, Compute Canada and CRC, Canada | es_ES |
dc.description.sponsorship | COST, ERC, ERDF, Horizon 2020 and Marie Skłodowska-Curie Actions, European Union | es_ES |
dc.description.sponsorship | Investissements d’Avenir Labex, Investissements d’Avenir Idex and ANR, France | es_ES |
dc.description.sponsorship | DFG and AvH Foundation, Germany | es_ES |
dc.description.sponsorship | Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece | es_ES |
dc.description.sponsorship | BSF-NSF and GIF, Israel | es_ES |
dc.description.sponsorship | Norwegian Financial Mechanism 2014-2021, Norway | es_ES |
dc.description.sponsorship | NCN and NAWA, Poland | es_ES |
dc.description.sponsorship | La Caixa Banking Foundation, CERCA Programme Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat Valenciana, Spain | es_ES |
dc.description.sponsorship | Göran Gustafssons Stiftelse, Sweden | es_ES |
dc.description.sponsorship | The Royal Society and Leverhulme Trust, United Kingdom | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Springer | es_ES |
dc.rights | Atribución 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | * |
dc.subject | Hadron-Hadron scattering | es_ES |
dc.subject | Top physics | es_ES |
dc.title | Measurement of the polarisation of single top quarks and antiquarks produced in the t-channel at s√ = 13 TeV and bounds on the tWb dipole operator from the ATLAS experiment | es_ES |
dc.type | journal article | es_ES |
dc.rights.accessRights | open access | es_ES |
dc.identifier.doi | 10.1007/JHEP11(2022)040 | |
dc.type.hasVersion | VoR | es_ES |
Ficheros en el ítem
Este ítem aparece en la(s) siguiente(s) colección(ones)
-
OpenAIRE (Open Access Infrastructure for Research in Europe)
Publicaciones financiadas por Framework Programme 7, Horizonte 2020, Horizonte Europa... del European Research Council de la Unión Europea en el marco del Proyecto OpenAIRE que promueve el acceso abierto a Europa.