Steps towards NNLO QCD calculations: collinear factorization at ″(αS2)

1999/05/18 by Massimiliano Grazzini, M. Grazzini
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1016/s0920-5632(99)00747-1

published as Nucl.Phys.Proc.Suppl. 79 (1999) 441-443 · 3 pages, 1 eps figure, talk given at the DIS99 Workshop, Zeuthen, Germany, April 19-23, 1999

arxiv created 1999/05/18 · openalex publication_date 1999/10/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

I consider the singular behaviour of tree-level QCD amplitudes when the momenta of three partons become simultaneously parallel and I discuss the universal factorization formula that controls the singularities of the multiparton matrix elements in this collinear limit.

Citations

• Asymptotic freedom in parton language
• Singular terms of helicity amplitudes at one-loop in QCD and the soft limit of the cross sections of multi-parton processes
• Collinear factorization and splitting functions for next-to-next-to-leading order QCD calculations