Statut  Confirmé 
Série  LPTHEPPH 
Domaines  hepph 
Date  Vendredi 26 Juillet 2019 
Heure  14:00 
Institut  LPTHE 
Salle  library 
Nom de l'orateur  Domingo 
Prenom de l'orateur  Florian 
Addresse email de l'orateur  
Institution de l'orateur  Bonn U. 
Titre  Electroweak corrections to the fermionic decays of heavy Higgs states 
Résumé  Extensions of the Standard Model often come with additional, possibly electroweakly charged Higgs states, the prototypal example being the TwoHiggsDoublet Model. While collider phenomenology does not exclude the possibility for some of these new scalar fields to be light, it is relatively natural to consider masses in the multiTeV range, where decoupling of the SMlike boson is almost guaranteed. The appearance of a hierarchy between the newphysics states and the electroweak scale then leads to sizable electroweak corrections in e.g. the decays of the heavy Higgs, which are dominated by effects of infrared type, namely Sudakov logarithms. Such radiative contributions obviously affect the twobody decays, but should also be paired with the radiation of electroweak (or lighter Higgs) bosons for a consistent picture at the oneloop order. Resummation of the leading terms is also relatively easy to achieve. We revisit these questions in the specific case of the fermionic decays of heavy Higgs particles in the NexttoMinimal Supersymmetric Standard Model, in particular pointing out the consequences of the threebody final states for the branching ratios of the heavy scalars. 
Numéro de preprint arXiv  
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