https://doi.org/10.1051/epjconf/20136020015
Measurement of top quark polarisation with the ATLAS experiment
Deutsches Elektronen-Synchroton, DESY, Notkestraße 85, D-22603, Hamburg, Germany
a Speaker, e-mail: sara.borroni@cern.ch
While in the Standard Model top quarks are predicted to be produced unpolarized at the LHC, several models beyond the SM predict a non-zero polarisation. In particular, some of the models predicting a larger forward-backward 
asymmetry than the SM, as measured at the Tevatron, predict a positive top quark polarisation. Using 4.66 fb−1 of data collected by the ATLAS experiment at a centre of mass energy of 7 TeV, a measurement of the top quark polarisation is presented. The full 
system is reconstructed from final states with at least one charged lepton, and a template fit to the distribution of the angle between the charged lepton and the top quark is performed to measure the top quark polarisation.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
