Measurement of top quark polarization in top-antitop events from proton-proton collisions at √s = 7 TeV using the ATLAS detector

This Letter presents measurements of the polarization of the top quark in top-antitop quark pair events, using 4:7 fb –1 of proton-proton collision data recorded with the ATLAS detector at the Large Hadron Collider at √s = 7 TeV. Final states containing one or two isolated leptons (electrons or muon...

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Autor principal:	Aad, G.
Formato:	JOUR
Materias:	Polarization Tellurium compounds ATLAS detectors Final state Large Hadron Collider Measurements of Production process Proton proton collisions The standard model Top quarks Elementary particles
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00319007_v111_n23_p_Aad
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

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spelling	todo:paper_00319007_v111_n23_p_Aad2023-10-03T14:42:28Z Measurement of top quark polarization in top-antitop events from proton-proton collisions at √s = 7 TeV using the ATLAS detector Aad, G. Polarization Tellurium compounds ATLAS detectors Final state Large Hadron Collider Measurements of Production process Proton proton collisions The standard model Top quarks Elementary particles This Letter presents measurements of the polarization of the top quark in top-antitop quark pair events, using 4:7 fb –1 of proton-proton collision data recorded with the ATLAS detector at the Large Hadron Collider at √s = 7 TeV. Final states containing one or two isolated leptons (electrons or muons) and jets are considered. Two measurements of α ℓ P, the product of the leptonic spin-analyzing power and the top quark polarization, are performed assuming that the polarization is introduced by either a CP conserving or a maximally CP violating production process. The measurements obtained, α ℓ P CPC =–0.035 ± 0.014(stat) ± 0:037(syst) and α ℓ P CPV = 0.020 ± 0:016(stat) +0.013 –0.017 (syst), are in good agreement with the standard model prediction of negligible top quark polarization. © 2013 CERN, for the ATLAS Collaboration. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00319007_v111_n23_p_Aad
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Polarization Tellurium compounds ATLAS detectors Final state Large Hadron Collider Measurements of Production process Proton proton collisions The standard model Top quarks Elementary particles
spellingShingle	Polarization Tellurium compounds ATLAS detectors Final state Large Hadron Collider Measurements of Production process Proton proton collisions The standard model Top quarks Elementary particles Aad, G. Measurement of top quark polarization in top-antitop events from proton-proton collisions at √s = 7 TeV using the ATLAS detector
topic_facet	Polarization Tellurium compounds ATLAS detectors Final state Large Hadron Collider Measurements of Production process Proton proton collisions The standard model Top quarks Elementary particles
description	This Letter presents measurements of the polarization of the top quark in top-antitop quark pair events, using 4:7 fb –1 of proton-proton collision data recorded with the ATLAS detector at the Large Hadron Collider at √s = 7 TeV. Final states containing one or two isolated leptons (electrons or muons) and jets are considered. Two measurements of α ℓ P, the product of the leptonic spin-analyzing power and the top quark polarization, are performed assuming that the polarization is introduced by either a CP conserving or a maximally CP violating production process. The measurements obtained, α ℓ P CPC =–0.035 ± 0.014(stat) ± 0:037(syst) and α ℓ P CPV = 0.020 ± 0:016(stat) +0.013 –0.017 (syst), are in good agreement with the standard model prediction of negligible top quark polarization. © 2013 CERN, for the ATLAS Collaboration.
format	JOUR
author	Aad, G.
author_facet	Aad, G.
author_sort	Aad, G.
title	Measurement of top quark polarization in top-antitop events from proton-proton collisions at √s = 7 TeV using the ATLAS detector
title_short	Measurement of top quark polarization in top-antitop events from proton-proton collisions at √s = 7 TeV using the ATLAS detector
title_full	Measurement of top quark polarization in top-antitop events from proton-proton collisions at √s = 7 TeV using the ATLAS detector
title_fullStr	Measurement of top quark polarization in top-antitop events from proton-proton collisions at √s = 7 TeV using the ATLAS detector
title_full_unstemmed	Measurement of top quark polarization in top-antitop events from proton-proton collisions at √s = 7 TeV using the ATLAS detector
title_sort	measurement of top quark polarization in top-antitop events from proton-proton collisions at √s = 7 tev using the atlas detector
url	http://hdl.handle.net/20.500.12110/paper_00319007_v111_n23_p_Aad
work_keys_str_mv	AT aadg measurementoftopquarkpolarizationintopantitopeventsfromprotonprotoncollisionsats7tevusingtheatlasdetector
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Measurement of top quark polarization in top-antitop events from proton-proton collisions at √s = 7 TeV using the ATLAS detector

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