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Statut |
Confirmé |
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Série |
RENC-THEO |
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Domaines |
cond-mat.stat-mech,hep-th,math-ph |
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Date |
Jeudi 22 Novembre 2018 |
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Heure |
10:00 |
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Institut |
IHP |
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Salle |
314 |
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Nom de l'orateur |
Chicherin |
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Prenom de l'orateur |
Dmitry |
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Addresse email de l'orateur |
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Institution de l'orateur |
Max Planck Institute for Physics Munich |
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Titre |
Scattering amplitudes from superconformal symmetry |
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Résumé |
We study the consequences of (super)conformal symmetry of massless scattering amplitudes.
The classical symmetry is potentially broken at the quantum level by infrared and ultraviolet
effects. We study its manifestations on the finite hard part of the scattering process. The
conformal Ward identities in momentum space are second-order differential equations,
difficult to analyze. We prefer to study superconformal symmetry whose generators are first-
order in the momenta. Working in a massless N = 1 supersymmetric Wess-Zumino model in
4D, we derive on-shell superconformal Ward identities. They contain an anomaly due to
collinear regions of loop momenta. We derive and solve Ward identities for various scattering
processes in the model. We find that the first-order differential equations, together with
physically motivated boundary conditions, uniquely fix the answer. All the cases considered
give rise to uniform weight functions. In particular we consider a five-point non-planar hexa-
box integral with an off-shell leg. It gives first indications on the function space needed for
Higgs plus two jet production at next-to-next-to leading order. |
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Numéro de preprint arXiv |
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Commentaires |
Attention, changement de lieu et date ! |
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Fichiers attachés |
- Chicherin_PresentationParisNovember2018.pdf (2487091 bytes)
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