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Type: Journal article
Title: Measurement of τ polarization in W → τν decays with the ATLAS detector in pp collisions at √s = 7 TeV
Other Titles: Measurement of tau polarization in W -> tau nu decays with the ATLAS detector in pp collisions at root s = 7 TeV
Author: Aad, G.
ATLAS Collaboration
Citation: European Physical Journal C: Particles and Fields, 2012; 72(7):2062-1-2062-21
Publisher: Springer
Issue Date: 2012
ISSN: 1434-6044
Statement of
G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... N. Soni ... M. J. White ... et al. (ATLAS Collaboration)
Abstract: In this paper, a measurement of τ polarization in W → τν decays is presented. It is measured from the energies of the decay products in hadronic τ decays with a single final state charged particle. The data, corresponding to an integrated luminosity of 24 pb⁻¹, were collected by the ATLAS experiment at the Large Hadron Collider in 2010. The measured value of the τ polarization is Pτ = −1.06±0.04 (stat) +0.05 −0.07 (syst), in agreement with the Standard Model prediction, and is consistent with a physically allowed 95 % CL interval [−1,−0.91]. Measurements of τ polarization have not previously been made at hadron colliders.
Keywords: ATLAS Collaboration
Rights: © CERN for the benefit of the ATLAS collaboration 2012. This article is published with open access at 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 the source are credited.
DOI: 10.1140/epjc/s10052-012-2062-6
Grant ID: ARC
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