19-21 September 2023
Europe/Berlin timezone

SIMPly add a dark photon

19 Sep 2023, 11:20
Nachrichtentechnik-Hörsaal (NTI) (KIT)

Nachrichtentechnik-Hörsaal (NTI)


Engesserstraße 5, 76131 Karlsruhe


Pieter Braat (Nikhef)


Observations of Dark Matter (DM) density profiles are in tension with the standard collisionless DM paradigm and can hint at DM self-interactions. Moreover, observations over different scales require the self-interactions to be velocity-dependent. In the talk I will present a dark sector consisting of dark pions and dark photons that can yield the required velocity dependence, via resonant exchange of a dark photon. The pions can be strongly interacting massive particle (SIMP) dark matter, produced by the freeze-out of 3 to 2 interactions, with naturally large self-interactions and masses $m_\pi \sim \mathcal{O}(100)$ MeV. I will then discuss the phenomenology as a result of the resonance, as well as show the viable regions of parameter space.

Primary author


Prof. Marieke Postma (Nikhef, Radboud University)

Presentation Materials

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now