Higher Order Corrections in Perturbative Quantum Chromo Dynamics

Abstract

We present some techniques which have been developed recently or in the recent past to compute Feynman graphs beyond one-loop order. These techniques are useful to compute the three-loop splitting functions in QCD and to obtain the complete second order QED corrections to Bhabha scattering.

Comments: 10 pages, LaTex. To appear in PRAMANA journal of physics