PIKIMO 12

Session

Noon Session

30 Apr 2022, 11:15

9. Cosmologically Degenerate Fermions

Ms Ying-Ying Li (Fermilab)

30/04/2022, 11:15

Even in the total absence of thermal kinetic energy, fermionic dark matter must have nonzero momentum due to the Pauli degeneracy pressure. As the fermions were inevitably denser at higher redshifts, a typical fermion may gain a fermi momentum that can exceed its mass. I will talk about the impacts of the transition between nonrelativistic and relativistic behaviour, as revealed by...

3. Maximizing Direct Detection with HYPER Dark Matter

Robert McGehee

30/04/2022, 11:30

We estimate the maximum direct detection cross section for sub-GeV dark matter scattering off nucleons. For dark matter masses in the range of $10 \text{ keV} − 100 \text{ MeV}$, cross sections greater than $10^{−36} - 10^{−30} \text{ cm}^2$ seem implausible. We introduce a dark matter candidate which realizes this
maximum cross section: HighlY interactive ParticlE Relics (HYPERs). After...

1. Signatures of hidden dark sectors

Kimberly Boddy (University of Texas at Austin)

30/04/2022, 11:45

While particle dark matter is often modeled or presented as being a single species of matter, it is possible that dark matter is a part of a larger dark sector that may contain additional dark particles and dark forces. Such a scenario gives rise to rich phenomenology and can have a significant impact on astrophysical and cosmological observables. Furthermore, if the dark sector is secluded...