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Measurement of the $W$ boson polarisation in $t\bar{t}$ events from $pp$ collisions at $\sqrt{s}$ = 8 TeV in the lepton+jets channel with ATLAS

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Academic year: 2021

Partager "Measurement of the $W$ boson polarisation in $t\bar{t}$ events from $pp$ collisions at $\sqrt{s}$ = 8 TeV in the lepton+jets channel with ATLAS"

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Figure 1: (a) Logarithm of the likelihood value as output for reconstructed t t ¯ events of the selected (best) jet-to- jet-to-parton permutation
Figure 2: Measured and predicted distributions of (a) likelihood and (b) event probability from the kinematic fit and reconstructed cos θ ∗ distribution using (c) the leptonic and (d) the hadronic analysers with ≥2 b-tags
Table 1: Expected and observed event yields in the four channels (“e + jets, 1 b-tag”, “e + jets, ≥2 b-tags”, “µ + jets, 1 b-tag” and “µ + jets, ≥2 b-tags”) after the final event selection including the cut on the reconstruction likelihood.
Figure 3: Templates of the cos θ ∗ distributions for the individual helicity fractions in the µ + jets channel with ≥ 2 b-tags for the (a) leptonic and (b) hadronic analyser.
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