Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines cond-mat.stat-mech,hep-th,math-ph
Date Jeudi 22 Novembre 2018
Heure 10:00
Institut IHP
Salle 314
Nom de l'orateur Chicherin
Prenom de l'orateur Dmitry
Addresse email de l'orateur
Institution de l'orateur Max Planck Institute for Physics Munich
Titre Scattering amplitudes from superconformal symmetry
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.
Numéro de preprint arXiv
Commentaires Attention, changement de lieu et date !
Fichiers attachés
  • Chicherin_PresentationParisNovember2018.pdf (2487091 bytes) OPEN

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