Effective field theories with non-linearly realised symmetries: from flat space scattering amplitudes to cosmology
David Stefanyszyn
VSI, University of Groningen
Tue, Dec. 11th 2018, 16:00-17:00
Salle Claude Itzykson, Bât. 774, Orme des Merisiers

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.

Contact : Brando BELLAZZINI


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