Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Série RENC-THEO
Domaines hep-th
Date Jeudi 25 Janvier 2018
Heure 11:45
Institut LPTHE
Salle IMPMC, salle 401, tour 22-23, 4eme étage
Nom de l'orateur Tourkine
Prenom de l'orateur Piotr
Addresse email de l'orateur piotr [dot] tourkine [at] cern [dot] ch
Institution de l'orateur CERN
Titre New duality symmetric theories from twisted strings
Résumé Twistor strings have undergone a renewal of interest since the discovery of the Cachazo-He- Yuan formalism for scattering amplitude in field theory in 2013. These formulae deeply challenge the way we think about scattering amplitudes in quantum field theory and are neatly explained by the so-called ambitwistor string, a cousin of the old twistor string. The existence of these remarkable formalisms, which I shall present during the talk, cried for a connection to good old string theory. The answer to this question is now understood: it relies on counter-intuitive limits and crucially, the existence of a different quantization for string theory, which we called “twisted strings”. The first part of the talk will be concerned on making that connection to string theory clear. In the second part, I’ll report on recent results obtained with Eduardo Casali on the winding modes of these twisted strings. They give rise to new exotic target space theories, naively non unitary, but exhibiting features half way between string and field theory. In particular, they are T-duality symmetric.
Numéro de preprint arXiv
Commentaires Beware, unusual location !
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