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Statut |
Confirmé |
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Série |
IPHT-HEP |
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Domaines |
hep-ph |
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Date |
Mercredi 1 Octobre 2014 |
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Heure |
14:15 |
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Institut |
IPHT |
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Salle |
Salle Claude Itzykson, Bât. 774, Orme des Merisiers |
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Nom de l'orateur |
Robbert Rietkerk |
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Prenom de l'orateur |
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Addresse email de l'orateur |
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Institution de l'orateur |
Nikhef (Amsterdam) |
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Titre |
Imaginary parts and discontinuities of Wilson line correlators |
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Résumé |
The infrared singularities of gauge theory scattering amplitudes play a fundamental role in particle physics. A key tool for computing such infrared singularities is provided by correlators of straight semi-infinite Wilson lines. In this talk I introduce a notion of position-space cuts of eikonal diagrams, as a method to compute the imaginary part of Wilson line correlators. I compare our position-space cuts to the standard momentum-space Cutkosky cutting rules, and discuss the origin of the imaginary part from the point of view of causality as well as unitarity. In the end I demonstrate the application of our formalism to several two- and three-loop eikonal diagrams. |
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Numéro de preprint arXiv |
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Commentaires |
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Fichiers attachés |
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