Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines hep-th
Date Jeudi 6 Fevrier 2020
Heure 10:00
Institut LPTHE
Salle LPTHE Library
Nom de l'orateur Oliver Schlotterer
Prenom de l'orateur
Addresse email de l'orateur
Institution de l'orateur Uppsala University
Titre Double-copy structures and universality in string tree-level interactions
Résumé > This talk is dedicated to recent double-copy constructions that unify massless tree-level amplitudes in a variety of perturbative string theories. All the polarization dependence in gauge- and gravity amplitudes of type-I, type-II, bosonic and heterotic string theories is proposed to enter via field-theory building blocks with a known Lagrangian origin. The second double-copy component of massless string amplitudes involves moduli-space integrals over punctured sphere and disk worldsheets whose low-energy expansion introduces multiple zeta values. At each order in the inverse string tension alpha’, the coefficients of highest transcendental weight turn out to be universal across the above perturbative string theories. These phenomena have not been explained by the known string dualities and are hoped to reflect a deeper principle in the theory of quantum gravity.
Numéro de preprint arXiv
Fichiers attachés
  • OS_Universality.pdf (878495 bytes) OPEN

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