Projects per year
Abstract
We study the structure of soft gluon corrections to multi-leg scattering amplitudes in a non-Abelian gauge theory by analysing the corresponding product of semi-infinite Wilson lines. We prove that diagrams exponentiate such that the colour factors in the exponent are fully connected. This completes the generalisation of the non-Abelian exponentiation theorem, previously proven in the case of a Wilson loop, to the case of multiple Wilson lines in arbitrary representations of the colour group. Our proof is based on the replica trick in conjunction with a new formalism where multiple emissions from a Wilson line are described by effective vertices, each having a connected colour factor. The exponent consists of connected graphs made out of these vertices. We show that this readily provides a general colour basis for webs. We further discuss the kinematic combinations that accompany each connected colour factor, and explicitly catalogue all three-loop examples, as necessary for a direct computation of the soft anomalous dimension at this order.
Original language | English |
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Article number | 88 |
Journal | Journal of High Energy Physics |
Volume | 2013 |
Issue number | 6 |
DOIs | |
Publication status | Published - 24 Jun 2013 |
Keywords / Materials (for Non-textual outputs)
- hep-ph
- hep-th
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Dive into the research topics of 'The Non-Abelian Exponentiation theorem for multiple Wilson lines'. Together they form a unique fingerprint.Projects
- 2 Finished
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Multiple jet production at the large Hadron Collider
Smillie, J. (Principal Investigator)
UK central government bodies/local authorities, health and hospital authorities
1/10/12 → 30/09/19
Project: Research
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Particle Theory at the Tait Institute
Ball, R. (Principal Investigator), Berera, A. (Co-investigator), Boyle, P. (Co-investigator), Del Debbio, L. (Co-investigator), Figueroa-O'Farrill, J. (Co-investigator), Gardi, E. (Co-investigator), Horsley, R. (Co-investigator), Kennedy, A. (Co-investigator), Kenway, R. (Co-investigator), Pendleton, B. (Co-investigator) & Simon Soler, J. (Co-investigator)
1/10/11 → 30/09/15
Project: Research