NNLO QCD corrections to event orientation in e+e- annihilation

Understand

We present a new implementation of the NNLO QCD corrections to three-jet final states and related event-shape observables in electron--positron annihilation.

• Our implementation is based on the antenna subtraction method, and is performed in the NNLOJET framework.
• The calculation improves upon earlier results by taking into account the full kinematical information on the initial state momenta, thereby allowing the event orientation to be computed to NNLO accuracy.
• We find the event-orientation distributions at LEP and SLC to be very robust under higher order QCD corrections.