Open AccessFactorisation and Local Subtraction of Infrared Divergences for QCD processes
Author(s) -
Chiara Signorile-Signorile
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1548/1/012039
Subject(s) - quantum chromodynamics , massless particle , factorization , physics , subtraction , integrable system , operator (biology) , particle physics , set (abstract data type) , mathematical physics , theoretical physics , quantum electrodynamics , mathematics , computer science , algorithm , transcription factor , gene , biochemistry , chemistry , arithmetic , repressor , programming language
We review a recently proposed subtraction procedure at next-to- and next-to-next- to-leading order in quantum chromodynamics (QCD), based on the introduction of a set of minimal, local and analytically integrable counterterms. We also provide an operator definition for the counterterms by investigating the factorisation properties of a generic massless virtual amplitude. Our local, analytic scheme is designed for massless final state radiation only, but its main features are extensible to initial state radiation.