Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series LPTHE-PPH
Subjects hep-ph
Date Tuesday 17 December 2019
Time 14:00
Institute LPTHE
Seminar Room library
Speaker's Last Name Tenkanen
Speaker's First Name Tommi
Speaker's Email Address
Speaker's Institution John Hopkins
Title Spectator Dark Matter
Abstract 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.
arXiv Preprint Number

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