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/lp/springer_journal/wilson-lines-and-webs-in-higher-order-qcd-tESMazREjT
- Publisher
- Springer Journals
- Copyright
- Copyright © 2018 by The Author(s)
- Subject
- Physics; Particle and Nuclear Physics; Nuclear Physics, Heavy Ions, Hadrons; Atomic, Molecular, Optical and Plasma Physics
- ISSN
- 0177-7963
- eISSN
- 1432-5411
- D.O.I.
- 10.1007/s00601-017-1327-x
- Publisher site
- See Article on Publisher Site
Abstract
Wilson lines have a number of uses in non-abelian gauge theories. A topical example in QCD is the description of radiation in the soft or collinear limit, which must often be resummed to all orders in perturbation theory. Correlators involving a pair of Wilson lines are known to exponentiate in terms of special Feynman diagrams called “webs”. I will show how this language can be extended to an arbitrary number of Wilson lines, which introduces novel new combinatoric structures (web mixing matrices) of interest in their own right. I will also summarise recent results obtained from applying this formalism at three-loop order, before concluding with a list of open problems.
Journal
Few-Body Systems – Springer Journals
Published: Feb 1, 2018
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