Automatic reduction of four-loop bubbles

Abstract

We give technical details about the computational strategy employed in a recently completed investigation of the four-loop QCD free energy. In particular, the reduction step from generic vacuum bubbles to master integrals is described from a practical viewpoint, for fully massive as well as QED-type integrals.

Comments: 5 pages. Talk presented at RADCOR/Loops and Legs 2002, Kloster Banz, Germany