2026 CAU-IBS Beyond the Standard Model Workshop

Session

Axion / dark matter / GW

Jun 9, 2026, 2:00 PM

Chung-Ang University

20. Global Structure, Non-Invertible PQ Symmetry, and the DFSZ Domain Wall Problem

Sungwoo Hong

6/9/26, 2:00 PM

In this talk, I will introduce the notion of global aspects in the physics of particles and topological defects by taking a concrete example of DFSZ axion model. In particular, I will describe how various global structures play important roles in the domain wall problem of the DFSZ axion model. A precise identification of the axion string–domain wall network—and hence the true nature of the...

21. A particle on a ring or: how I learned to stop worrying and love theta-vacua

Ryosuke Sato

6/9/26, 2:30 PM

Although the QCD Lagrangian allows CP violation by the theta-term, no such effect has been observed yet. This puzzle is called the strong CP problem. In this talk, I will review a recent debate on the order of limit in the path integral formulation of strong CP violation, and discuss the validity of the formulation by focusing on quantum mechanics on a circle.

22. Holographic Origins of the QCD Vacuum Angle and Axion

Dr Taewook Youn (Cornell University)

6/9/26, 3:00 PM

We present a holographic construction of the QCD axion based on a warped 5D model. A key ingredient of our setup is the introduction of a bulk scalar field $\theta$ which is holographically dual to the topological operator of QCD. We identify the bulk modes corresponding to the $\eta'$ and axion states, and show that an adjustment analogous to that of the usual 4D axion takes place.
We...

23. Probing the QCD Axion: Current Limits and Future Directions

Dr SungWoo Youn (Institute for Basic Science)

6/9/26, 3:45 PM

The QCD axion is a well-motivated dark matter candidate arising from both the strong CP problem and cosmology. Recent advances in haloscope experiments and quantum-limited microwave detection have substantially expanded the search sensitivity toward the QCD axion parameter space. In this talk, I will review the current status of axion dark matter searches and present recent experimental...

24. New Physics at the Pulsar Timing Array Frontier

Kai Schmitz

6/9/26, 4:15 PM

I will review the 2023 pulsar timing array (PTA) evidence for a
stochastic gravitational-wave background at nanohertz frequencies and
discuss how PTA observations allow us to search for new particle and
gravitational physics, including: (1) physics beyond the Standard Model
in the early Universe, (2) dark matter in our galaxy and in the vicinity
of supermassive black-hole binaries, and...

25. Status of GLIMPSE and Dark-Matter Mass from Angular Scanning

Prof. Jong-Chul Park (Chungnam National University (KR))

6/9/26, 4:45 PM

We propose a novel detection strategy for super-light dark matter (DM), m_DM ~ O(keV), using a detector based on Graphene Josephson Junctions (GJJ). By intimately integrating the π-bond electrons of graphene as the target material into a Josephson junction, we create a sensor capable of detecting energy deposits as small as O(meV). We evaluate the scattering rates between DM and free electrons...

46. Self-Resonant Dark Matter and its Z4 realization

Seong-Sik Kim (Chungnam National University)

6/9/26, 5:15 PM

26. Axiogenesis and Kinetic Misalignment with Dissipation from Dark Magnetic Monopoles

Raymond Co (Indiana University)

6/10/26, 9:30 AM

We propose a framework in which the QCD axion simultaneously accounts for the baryon asymmetry and contributes to dark matter through its early-universe rotation. A Peccei–Quinn (PQ) field rotation corresponds to a conserved PQ charge, which can be transferred to baryon number via sphaleron processes (axiogenesis) and to the axion abundance through its kinetic energy (the kinetic misalignment...