Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines hep-ph
Date Mardi 11 Décembre 2018
Heure 16:00
Institut IPHT
Salle Salle Claude Itzykson, Bât. 774
Nom de l'orateur David Stefanyszyn
Prenom de l'orateur
Addresse email de l'orateur
Institution de l'orateur VSI, University of Groningen
Titre Effective field theories with non-linearly realised symmetries: from flat space scattering amplitudes to cosmology
Résumé In this talk I will outline work I have done over the past 12 months or so on non-linearly realised symmetries in effective field theories both on Lorentz invariant and Lorentz violating backgrounds. I will first discuss the general formulism of the coset construction and inverse Higgs constraints as a tool to construct non-linear realisations of spontaneously broken symmetries. I will then explain how this provides a useful classification of scalar quantum field theories in flat space followed by discussing how it provides a useful tool for building inflationary models. I will also present a general classification of non-linearly realised symmetries within the effective field theory framework of single clock cosmologies. I will make the talk very pedagogical.
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