Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines hep-th
Date Jeudi 7 Novembre 2019
Heure 11:40
Institut IHP
Salle 314
Nom de l'orateur Erbin
Prenom de l'orateur Harold
Addresse email de l'orateur
Institution de l'orateur ASC LMU Munich
Titre Topics in string amplitudes
Résumé In this talk, I will present two recent results on string amplitudes. First, I will explain how a correct computation of the 2-point amplitude on the sphere matches the expected result from QFT, instead of vanishing as it was long believed. Second, I will outline the proofs of primitive analyticity and crossing symmetry for superstring amplitudes to all orders in perturbation theory. Since these properties are related to locality and causality in position space in standard QFTs, this opens a possible window on the nature of the interaction non-locality and how it fits withing the usual QFT axioms.
Numéro de preprint arXiv
Commentaires 1810.07197,1906.06051
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