Two-loop QED and QCD corrections to massless fermion-boson scattering

Preprint

29 January 2002

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ph/0201274

Abstract

We present the NNLO QCD virtual corrections for qurak-antiquark -> gluon photon, quark-antiquark -> photon photon and the NNLO QED virtual corrections for electron positron -> photon photon and all processes related by crossing symmetry. We perform an explicit evaluation of the two-loop diagrams in conventional dimensional regularisation, and our results are renormalised in the MSbar scheme. The infrared pole structure of the amplitudes is in agreement with the prediction of Catani's general formalism for the singularities of two-loop amplitudes, while expressions for the finite remainder are given for all processes in terms of logarithms and polylogarithms that are real in the physical region.

Keywords

VIRTUAL CORRECTIONS
PHOTON PHOTON
ANTIQUARK
TWO LOOP
NNLO
QCD
QED

All Related Versions

Version 1, 2002-01-29, ArXiv
Version 1, 2001-01-26, ArXiv (Unconfirmed version)
Version 2, 2001-12-07, ArXiv (Unconfirmed version)
Version 3, 2003-05-06, ArXiv (Unconfirmed version)
Version 4, 2007-06-29, ArXiv (Unconfirmed version)
Published version: Nuclear Physics B, 629 (1-3), 255.

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