PoS - Proceedings of Science
Volume 382 - The Eighth Annual Conference on Large Hadron Collider Physics (LHCP2020) - Session : Top physics
Measurements of top properties in ATLAS
C. Young
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Abstract
Results of analyses of top quark properties measured at the LHC are presented on behalf of the ATLAS Collaboration. Particular attention is given to three recent results. In an analysis of the charge asymmetry in $t\bar{t}$ production evidence of a non-zero asymmetry is seen for the first time. Secondly, the measurement of $t\bar{t}$ spin correlations is discussed. Finally, using $t\bar{t}$ events, lepton flavour universality is tested through a measurement of the ratio of the rates of decay of $W$-bosons to $\tau$-leptons and muons, $R(\tau/\mu)=B(W\rightarrow\tau\nu_\tau)/B(W\rightarrow \mu\nu_\mu)$.
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