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Abstract:

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.

Registro:

Documento: Artículo
Título:Measurement of top quark polarization in top-antitop events from proton-proton collisions at √s = 7 TeV using the ATLAS detector
Autor:Aad, G. et al.
Este artículo contiene 2898 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2898 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Palabras clave:Polarization; Tellurium compounds; ATLAS detectors; Final state; Large Hadron Collider; Measurements of; Production process; Proton proton collisions; The standard model; Top quarks; Elementary particles
Año:2013
Volumen:111
Número:23
DOI: http://dx.doi.org/10.1103/PhysRevLett.111.232002
Título revista:Physical Review Letters
Título revista abreviado:Phys Rev Lett
ISSN:00319007
CODEN:PRLTA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v111_n23_p_Aad

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Citas:

---------- APA ----------
(2013) . Measurement of top quark polarization in top-antitop events from proton-proton collisions at √s = 7 TeV using the ATLAS detector. Physical Review Letters, 111(23).
http://dx.doi.org/10.1103/PhysRevLett.111.232002
---------- CHICAGO ----------
Aad, G. "Measurement of top quark polarization in top-antitop events from proton-proton collisions at √s = 7 TeV using the ATLAS detector" . Physical Review Letters 111, no. 23 (2013).
http://dx.doi.org/10.1103/PhysRevLett.111.232002
---------- MLA ----------
Aad, G. "Measurement of top quark polarization in top-antitop events from proton-proton collisions at √s = 7 TeV using the ATLAS detector" . Physical Review Letters, vol. 111, no. 23, 2013.
http://dx.doi.org/10.1103/PhysRevLett.111.232002
---------- VANCOUVER ----------
Aad, G. Measurement of top quark polarization in top-antitop events from proton-proton collisions at √s = 7 TeV using the ATLAS detector. Phys Rev Lett. 2013;111(23).
http://dx.doi.org/10.1103/PhysRevLett.111.232002