Top quark pairs at two loops and Reduze 2

Understand

We report on progress for the analytical calculation of the two-loop corrections to top quark pair production at hadron colliders.

• For the light fermionic corrections in the gluon channel, we discuss the analytical solution for the master integrals of a non-planar double box with a massive propagator.
• The result in terms of Goncharov's multiple polylogarithms is handled using systematic reductions based on the symbol map and the coproduct.
• We discuss new features of the computer program Reduze 2.