Higher order corrections in perturbative quantum chromodynamics

[摘要] 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.

[学科分类] 物理（综合）

[关键词] Quantum chromodynamics;perturbation theory;higher order.