Conveners
DM11: Self-interacting dark matter and light mediators
- Shigetaka Moriyama (ICRR, The University of Tokyo)
Dr
Camilo Alfredo Garcia Cely
(DESY)
9/11/19, 2:30 PM
Dark matter
Oral presentation in parallel session
Self-interacting dark matter is a well-motivated solution to the core-vs-cusp and the too-big-to-fail problems of the ΛCDM model. In this context, a light particle mediating the self-interactions is typically invoked in order to achieve velocity-dependent effects. In this talk, I will argue that a light mediator is not the only possible way to do that. In particular, I will discuss two new...
Prof.
Kingman Cheung
(National Tsing Hua University)
9/11/19, 2:50 PM
Dark matter
Oral presentation in parallel session
We examine the cosmology of warm dark matter (WDM), both stable and decaying, from the point of view of structure formation. We compare the matter power spectrum associated to WDM masses of 1.5 keV and 0.158 keV, with that expected for the stable cold dark matter ΛCDM≡SCDM paradigm, taken as our reference model. We scrutinize the effects associated to the warm nature of dark matter, as well as...
Mr
Marco Hufnagel
(DESY)
9/11/19, 3:10 PM
Dark matter
Oral presentation in parallel session
Meta-stable dark sector particles decaying into electrons or photons may non-trivially change the Hubble rate, lead to entropy injection into the thermal bath of Standard Model particles and may also photodisintegrate light nuclei formed in the early universe. We study generic constraints from Big Bang Nucleosynthesis on such a setup, with a particular emphasis on MeV-scale particles which are...
Mr
Shu-Yu Ho
(Tohoku University)
9/11/19, 3:30 PM
Dark matter
Oral presentation in parallel session
We study the monopole dark matter (MDM) emerging from a spontaneous breakdown of non- abelian gauge symmetry in the hidden sector. We assume that this hidden MDM was produced as a topological defect during a second-order phase transition in the early universe, and its stability is guaranteed by the topological nature. In particular, we introduce an axion-like particle (ALP), which mediates the...
