Conveners
Parallel Session: Cosmology & Astroparticle Physics - Dark Matter
- Nayara Fonseca
- Valerie Domcke
Mr
Andreas Rappelt
(Technische Universität München)
27/09/2017, 14:00
Cosmology & Astroparticle Physics
Recent results from N-body simulations point towards the existence of non-virialized structures in the dark matter halo. This weakens the assumptions of the Standard Halo Model and increases the need for ways to analyze results of direct dark matter searches without specifying a halo model. We propose a numerical method that compares an arbitrary number of results from direct detection...
Dr
Sebastian Wild
(DESY)
27/09/2017, 14:17
Cosmology & Astroparticle Physics
One of the simplest particle physics realizations of self-interacting dark matter is a WIMP interacting with a MeV-scale scalar mediator. While this scenario is already largely excluded for dark matter masses above ~5 GeV by null searches from various direct detection experiments, future low-threshold detectors such as CRESST and CDMS could be sensitive to so far unexplored regions of the...
Mr
Tobias Binder
(ITP, Goettingen University)
27/09/2017, 14:34
Cosmology & Astroparticle Physics
The understanding of theoretical uncertainties in the production mechanism of dark matter (DM) particles in the Early Universe has become an important topic from the viewpoint of the percent-level accuracy in the observational determination of the relic abundance. We consider the case where heavy DM self-interacts via t-channel exchange of a light gauge boson, leading to a Sommerfeld-enhanced...
Dr
Michael Gustafsson
(Göttingen University)
27/09/2017, 14:51
Cosmology & Astroparticle Physics
Today’s standard formalism to calculate the abundance of thermally produced dark matter particles relies on the underlying assumption that annihilating dark matter particles are in kinetic equilibrium throughout the freeze-out period. I will point out that this assumption does not have to be fulfilled in general and then present two methods on how to generalize the formalism in order to deal...
Ayuki Kamada
(IBS-CTPU)
27/09/2017, 15:08
Cosmology & Astroparticle Physics
Kinetic interaction (e.g., elastic scatterings) between dark matter particles and those in the thermal bath does not change the dark matter number, but it may affect the relic density of dark matter.
In particular it plays an essential role in determining the relic abundance of strongly interacting massive particles, which may solve issues in the (sub-)galactic structure formation of the...
Sebastian Ingenhütt
(TU of Munich and MPP, Munich)
27/09/2017, 15:26
Cosmology & Astroparticle Physics
One of the key properties of dark matter particles is their longevity. However, even if dark matter is absolutely stable against decay in flat spacetime, as commonly assumed in the literature, the presence of nonminimal couplings to gravity of the dark matter field can spoil this stability in curved spacetime, with potentially remarkable phenomenological implications. More specifically, a...
