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A number of top-spin observables are computed within the Standard Model (SM),at next-to-leading order in the strong and weak gauge couplings for hadronictop-quark anti-quark (ttbar) production and decay at the LHC for center-of-massenergies 7 and 8 TeV. For dileptonic final states we consider the azimuthalangle correlation, the helicity correlation, and the opening angledistribution; for lepton plus jets final states we determine distributions andasymmetries that trace a longitudinal and transverse polarization,respectively, of the t and t-bar samples. In addition, we investigate theeffects of a non-zero chromo-magnetic and chromo-electric dipole moment of thetop quark on these and other top-spin observables and associated asymmetries.These observables allow to disentangle the contributions from the real andimaginary parts of these moments.

Top quark spin correlations and polarization at the LHC: standard model predictions and effects of anomalous top chromo moments