29 September 2015 to 2 October 2015
DESY Hamburg
Europe/Berlin timezone

Self-interacting dark matter and cosmology of a light scalar mediator

30 Sep 2015, 15:00
Main Auditorium (DESY Hamburg)

Main Auditorium

DESY Hamburg


Mr Ville Vaskonen (University of Jyväskylä)


We consider a fermionic dark matter candidate interacting via a scalar mediator coupled with the Standard Model through a Higgs portal. Motivated by the core-cusp problem, we study dark matter self-interactions which lead us to the region of the parameter space where the scalar mediator is light. We illustrate the relevant features for dark matter abundance, direct search limits and collider constraints, and find out that the coupling of the scalar mediator to the Higgs boson has to be very small. Finally we show how the problems of a light scalar mediator in the early universe can be resolved.

Primary author

Mr Ville Vaskonen (University of Jyväskylä)


Prof. Kimmo Kainulainen (University of Jyväskylä) Dr Kimmo Tuominen (University of Helsinki)

Presentation Materials