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Measurement of τ polarisation in Z/γ∗→ττ decays in proton–proton collisions at √s = 8 TeV with the ATLAS detector

ContributorsATLAS Collaboration
Collection
  • Open Access - SCOAP3
Publication date2018
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

Citation (ISO format)
ATLAS Collaboration. Measurement of τ polarisation in Z/γ∗→ττ decays in proton–proton collisions at √s = 8 TeV with the ATLAS detector. In: The European Physical Journal. C, Particles and Fields, 2018, vol. 78, n° 2, p. 163. doi: 10.1140/epjc/s10052-018-5619-1
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ISSN of the journal1434-6044
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