Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/3657
Title: Measurement of ? polarisation in Z/ ?*› ?? decays in proton–proton collisions at ?s=8 TeV with the ATLAS detector
Authors: The ATLAS Collaboration
Sultansoy, Saleh
Keywords: Collisions
jets
proton–proton collisions
Issue Date: Feb-2018
Publisher: Springer New York LLC
Source: ATLAS collaboration. (2018). Measurement of $$\tau $$ polarisation in $$ Z/\gamma^{*}\rightarrow\tau\tau $$ Z/??? decays in proton–proton collisions at $$\sqrt {s}= 8$$ s= 8 TeV with the ATLAS detector. The European Physical Journal C, 78(2), 163.
Abstract: This paper presents a measurement of the polarisation of τ leptons produced in Z/ γ∗→ ττ decays which is performed with a dataset of proton—proton collisions at s=8 TeV, corresponding to an integrated luminosity of 20.2 fb- 1 recorded with the ATLAS detector at the LHC in 2012. The Z/ γ∗→ ττ decays are reconstructed from a hadronically decaying τ lepton with a single charged particle in the final state, accompanied by a τ lepton that decays leptonically. The τ polarisation is inferred from the relative fraction of energy carried by charged and neutral hadrons in the hadronic τ decays. The polarisation is measured in a fiducial region that corresponds to the kinematic region accessible to this analysis. The τ polarisation extracted over the full phase space within the Z/ γ∗ mass range of 66 <mZ/ 116 GeV is found to be Pτ= - 0.14 ± 0.02 (stat) ± 0.04 (syst). It is in agreement with the Standard Model prediction of Pτ= - 0.1517 ± 0.0019 , which is obtained from the ALPGEN event generator interfaced with the PYTHIA 6 parton shower modelling and the TAUOLA τ decay library. © 2018, CERN for the benefit of the ATLAS collaboration.
URI: https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-018-5619-1
https://hdl.handle.net/20.500.11851/3657
ISSN: 14346044
Appears in Collections:Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü / Department of Material Science & Nanotechnology Engineering
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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