Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines hep-th
Date Jeudi 21 Septembre 2017
Heure 11:45
Institut IHP
Salle Room 314
Nom de l'orateur Paulos
Prenom de l'orateur Miguel
Addresse email de l'orateur
Institution de l'orateur LPTENS
Titre The S-matrix strikes back
Résumé In this talk I will describe recent work aiming to reinvigorate the 50 year old S-matrix program, which seeks to constrain scattering of massive particles non-perturbatively. I will begin by considering quantum fields in anti-de Sitter space and show that one can extract information about the S-matrix by considering correlators in conformally invariant theories. The latter can be studied with "bootstrap" techniques, which allow us to constrain the S-matrix. I will also show that this can be done directly, without using the CFT crutch, by using crossing symmetry and unitarity and a particular ansatz. In this way we derive universal bounds on QFTs in 2,3 and 4 dimensions.
Numéro de preprint arXiv
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