Speaker
Mr
Tommi Tenkanen
(University of Helsinki)
Description
Can dark matter properties be constrained or detected if dark matter particles do not interact with the Standard Model fields? The answer is yes. By studying both cosmological and astrophysical constraints, we show that stringent constraints on dark matter particle mass
and coupling values can be derived even if the dark matter sector is uncoupled from the
Standard Model sector.
By taking the Higgs portal model as a representative example, we compute the total dark
matter abundance from decay of a primordial dark matter condensate and nonthermal
production from the Standard Model sector. We then use the Planck limit on isocurvature perturbations and different astrophysical constraints on dark matter properties to
derive a novel constraint connecting dark matter particle mass and self-interaction coupling with
the scale of cosmic inflation.
Primary author
Mr
Tommi Tenkanen
(University of Helsinki)
Co-authors
Prof.
Kimmo Kainulainen
(University of Jyväskylä)
Dr
Kimmo Tuominen
(University of Helsinki)
Dr
Matti Heikinheimo
(University of Helsinki)
Dr
Sami Nurmi
(University of Jyväskylä)
Mr
Ville Vaskonen
(University of Jyväskylä)
