Statut  Confirmé 
Série  STRLPTENSHE 
Domaines  hepth 
Date  Vendredi 19 Fevrier 2021 
Heure  15:00 
Institut  LPTENS 
Salle  GoToMeeting 
Nom de l'orateur  Wulzer 
Prenom de l'orateur  Andrea 
Addresse email de l'orateur  
Institution de l'orateur  CERN and EPFL and Padua 
Titre  Goldstone Equivalence and High Energy Electroweak Physics 
Résumé  After a brief introduction to the type of questions that drive my research in general, I will illustrate specific results on the study of massive gauge theories at energies much above the mass of the vector bosons. In particular, I will present a novel formalism for allorders perturbative calculations where powercounting (of mass/energy, and couplings) is manifest at the level of individual Feynman diagrams. The formalism might be used, practically, to simplify highorder calculations in the high energy regime, and theoretically to establish general properties of scattering amplitudes in kinematical configurations characterised by largely separated scales. This is illustrated by proving the simplest factorisation theorem (treelevel collinear factorisation) in the complete Standard Model theory. The result might be a step forward towards the understanding of the "IR problem" associated with Electroweak interactions. The talk is based on 1309.6055 and 1911.12366 . 
Numéro de preprint arXiv  1911.12366 
Commentaires  https://www.gotomeet.me/LPENSIF Code: 418109349 
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