Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines hep-ph
Date Mardi 17 Décembre 2019
Heure 14:00
Institut LPTHE
Salle library
Nom de l'orateur Tenkanen
Prenom de l'orateur Tommi
Addresse email de l'orateur
Institution de l'orateur John Hopkins
Titre Spectator Dark Matter
Résumé The observed dark matter (DM) abundance in the Universe can be fully accounted for by a minimally coupled spectator scalar field that was light during cosmic inflation. In this scenario, dark matter was produced during inflation by amplification of quantum fluctuations of the spectator field. I will discuss the DM isocurvature perturbations that are unavoidably generated in such scenarios and the circumstances under which they are not problematic for the viability of non-thermal DM models. I will also discuss implications of DM isocurvature for structure formation, showing that the model has interesting consequences which allow one to test the scenario.
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