2026 CAU-IBS Beyond the Standard Model Workshop

Session

Cosmo

8 Jun 2026, 09:30

Chung-Ang University

7. Predicting the dark matter - baryon abundance ratio

Anson Hook (University of Maryland)

08/06/2026, 09:30

We discuss relaxation solutions to the dark matter - baryon coincidence problem in the context of QCD axion dark matter. In relaxation solutions, a moduli dynamically adjusts the mass of dark matter and baryons until their energy densities are O(1) the same. Because the QCD axion is heavily connected to QCD, scanning the QCD axion mass inherently also scans the proton mass. In the context of...

8. Cepheid as a dark matter detector

Prof. Hyung Do Kim (Seoul National University)

08/06/2026, 11:00

9. Can pre-inflationary axions form miniclusters?

Heejoo Kim (KIAS)

08/06/2026, 11:30

The pre-inflationary axion dark matter scenario, with its uniform initial misalignment angle, is conventionally expected to yield smooth dark matter without substructure. We explore scenarios of pre-inflationary axion cosmology, where adiabatic temperature perturbations from inflation can source non-trivial axion density fluctuations through both the temperature-dependent QCD axion mass and...

10. Micro Black Holes may be Dark Matter of the Universe

Misao Sasaki

08/06/2026, 14:00

11. TBA

Jinn-Ouk Gong

08/06/2026, 14:30

27. Kinetic Isocurvature Perturbation

Chang Sub SHIN (Chungnam National University)

08/06/2026, 15:00

We formulate a new class of primordial perturbations called \textit{kinetic isocurvature perturbations}, where the mass density of dark matter is constant relative to the photon number density while the kinetic energy of dark matter fluctuates in space. Such perturbations naturally arise in scenarios where a nonrelativistic heavy field decays into relativistic dark matter particles with a...