Measurement of τ polarization in W→τν decays with the ATLAS detector in pp collisions at √s=7 TeV
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Measurement of.pdf
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1.5 MB
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Checksum (MD5)
110d0254521c2f2e2e0f6bd0e3279673
Author(s)
Taylor, Frank E
Date Issued
July 2012
Journal
The European Physical Journal C
Publisher
Springer-Verlag
Citation
The ATLAS Collaboration et al. “Measurement of τ Polarization in W→τν Decays with the ATLAS Detector in Pp Collisions at √s=7 TeV.” The European Physical Journal C 72.7 (2012): n. pag. © 2012 CERN for the benefit of the ATLAS collaboration
Version
Final published version
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[superscript −1], were collected by the ATLAS experiment at the Large Hadron Collider in 2010. The measured value of the τ polarization is P[subscript τ]=−1.06±0.04 (stat)[superscript +0.05][subscript −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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1140/epjc/s10052-012-2062-6
