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. |
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