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https://hdl.handle.net/2440/93262
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Type: | Journal article |
Title: | Measurement of the W boson polarization in top quark decays with the ATLAS detector |
Author: | ATLAS collaboration, |
Citation: | The Journal of High Energy Physics, 2012; 2012(6):88-1-88-45 |
Publisher: | Springer |
Issue Date: | 2012 |
ISSN: | 1126-6708 1029-8479 |
Statement of Responsibility: | The ATLAS collaboration |
Abstract: | This paper presents measurements of the polarization of W bosons in top quark decays, derived from tt¯ 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. |
Keywords: | Hadron-Hadron Scattering |
Description: | ATLAS Collaborators for the University of Adelaide: |
Rights: | Open Access, Copyright CERN, for the benefit of the ATLAS collaboration. This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. |
DOI: | 10.1007/JHEP06(2012)088 |
Published version: | http://dx.doi.org/10.1007/jhep06(2012)088 |
Appears in Collections: | Aurora harvest 7 Physics publications |
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hdl_93262.pdf | Published version | 930.36 kB | Adobe PDF | View/Open |
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