Infrared Singularities of Scattering Amplitudes in Perturbative QCD
Journal Article
·
· Physical Review Letters
- Fermi National Accelerator Laboratory, Post Office Box 500, Batavia, Illinois 60510 (United States)
- Institut fuer Physik (THEP), Johannes Gutenberg-Universitaet, D-55099 Mainz (Germany)
An exact formula is derived for the infrared singularities of dimensionally regularized scattering amplitudes in massless QCD with an arbitrary number of loops and legs. It is based on the conjecture that the anomalous-dimension matrix of n-jet operators in soft-collinear effective theory is fully determined by three functions of {alpha}{sub s}, which can be extracted from known perturbative results for the quark and gluon form factors. This allows us to predict the three-loop coefficients of all 1/{epsilon}{sup k} poles for arbitrary n-parton scattering amplitudes, generalizing existing two-loop results.
- OSTI ID:
- 21316633
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 16 Vol. 102; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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