|Speaker:||Ayuki Kamada (IBS)|
|Title:||Light feebly interacting massive particle: freeze-in production and galactic-scale structure formation|
|Date (JST):||Wed, Jun 12, 2019, 13:30 - 14:30|
|Place:||Seminar Room A|
Feebly interacting massive particles (FIMPs), contrasting with weakly interacting massive particles (WIMPs), is an intriguing dark matter candidate.
Light (keV-scale) FIMPs produced by the freeze-in mechanism is of particular interest in that the structure formation of the Universe with FIMPs differs from that with WIMPs on galactic scales.
The galactic-scale structure formation has been probed in many independent ways: Lyman-alpha forest spectra and the number of satellite galaxies in the Milky Way.
We discuss the current constraints from observed galactic-scale structure and future prospects.
Particular stress is placed on that the details of the production processes can impact the obtained constraints.