Measurement of the W boson polarization in top quark decays with the ATLAS detector

This paper presents measurements of the polarization of W bosons in top quark decays, derived from t¯t 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 co...

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Detalles Bibliográficos
Autores principales: Anduaga, Xabier Sebastián, Dova, María Teresa, Monticelli, Fernando Gabriel, Tripiana, Martín Fernando, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2012
Materias:
Física
hadron-hadron scattering
w boson
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/78696
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-78696
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
hadron-hadron scattering
w boson
spellingShingle Física
hadron-hadron scattering
w boson
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
Measurement of the W boson polarization in top quark decays with the ATLAS detector
topic_facet Física
hadron-hadron scattering
w boson
description This paper presents measurements of the polarization of W bosons in top quark decays, derived from t¯t 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 F0 = 0.67 ± 0.07, FL = 0.32 ± 0.04 and FR = 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.
format Articulo
Articulo
author Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
author_facet Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
author_sort Anduaga, Xabier Sebastián
title Measurement of the W boson polarization in top quark decays with the ATLAS detector
title_short Measurement of the W boson polarization in top quark decays with the ATLAS detector
title_full Measurement of the W boson polarization in top quark decays with the ATLAS detector
title_fullStr Measurement of the W boson polarization in top quark decays with the ATLAS detector
title_full_unstemmed Measurement of the W boson polarization in top quark decays with the ATLAS detector
title_sort measurement of the w boson polarization in top quark decays with the atlas detector
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/78696
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