Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines hep-th
Date Jeudi 23 Mars 2023
Heure 11:45
Institut IHP
Salle Grisvard (314)
Nom de l'orateur Wall
Prenom de l'orateur Aron
Addresse email de l'orateur
Institution de l'orateur Cambridge
Titre The Off-shell String Effective Action
Résumé Taking string theory off shell requires breaking Weyl invariance on the worldsheet, i.e. the worldsheet theory is now a QFT instead of a CFT. I will explain Tseytlin’s approach to taking the worldsheet theory off- shell in a consistent manner, with a particular emphasis on the subtleties involved in calculating the sphere amplitude. This approach allows for the derivation of a classical string action which gives rise to the correct equations of motion and S-matrix, to all orders in perturbation theory. I will also briefly describe the Susskind-Uglum derivation of the black hole entropy S = A/4G from the off-shell string worldsheet.
Numéro de preprint arXiv
Commentaires Based on arXiv:2211.08607 and 2211.16448.
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