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Abstract:

This paper presents measurements of the polarization ofW bosons in top quark decays, derived from tt̄ events with missing transverse momentum, one charged lepton and at least four jets, or two charged leptons and at least two jets. Data from pp collisions at a centre-of-mass energy of 7 TeV were collected with the ATLAS experiment at the LHC and correspond to an integrated luminosity of 1.04 fb -1 . The measured fractions of longitudinally, left- and right-handed polarization are F 0 = 0.67 ± 0.07, F L = 0.32 ± 0.04 and F R = 0.01 ± 0.05, in agreement with the Standard Model predictions. As the polarization of the W bosons in top quark decays is sensitive to the Wtb vertex Lorentz structure and couplings, the measurements were used to set limits on anomalous contributions to the Wtb couplings. © CERN.

Registro:

Documento: Artículo
Título:Measurement of the W boson polarization in top quark decays with the ATLAS detector
Autor:Aad, G. et al.
Este artículo contiene 2868 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2868 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Palabras clave:Hadron-Hadron Scattering
Año:2012
Volumen:2012
Número:6
DOI: http://dx.doi.org/10.1007/JHEP06(2012)088
Título revista:Journal of High Energy Physics
Título revista abreviado:J. High Energy Phys.
ISSN:11266708
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2012_n6_p_Aad

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Citas:

---------- APA ----------
(2012) . Measurement of the W boson polarization in top quark decays with the ATLAS detector. Journal of High Energy Physics, 2012(6).
http://dx.doi.org/10.1007/JHEP06(2012)088
---------- CHICAGO ----------
Aad, G. "Measurement of the W boson polarization in top quark decays with the ATLAS detector" . Journal of High Energy Physics 2012, no. 6 (2012).
http://dx.doi.org/10.1007/JHEP06(2012)088
---------- MLA ----------
Aad, G. "Measurement of the W boson polarization in top quark decays with the ATLAS detector" . Journal of High Energy Physics, vol. 2012, no. 6, 2012.
http://dx.doi.org/10.1007/JHEP06(2012)088
---------- VANCOUVER ----------
Aad, G. Measurement of the W boson polarization in top quark decays with the ATLAS detector. J. High Energy Phys. 2012;2012(6).
http://dx.doi.org/10.1007/JHEP06(2012)088