Probing the spin correlations of $t\bar t $ production at NLO QCD+EW

Understand

In this work we investigate the NLO QCD+EW corrections to the top quark pair production and their effects on the spin correlation coefficients and asymmetries at fixed-order top quark pair production and LO decay in the dilepton channel, within the narrow-width approximation.

• The spin correlations are implicitly measured through the lepton kinematics.
• Moreover we study the EW effects to the leptonic differential distributions.
• We find that the EW corrections to the $t \bar t$ production are within the NLO QCD theoretical uncertainties for the spin correlation coefficients and the leptonic asymmetries.