### Conveners

#### Morning Session

- Eung Jin Chun (Korea Institute for Advanced Study)

#### Morning Session

- Hyun Min Lee (CAU - Chung-Ang University (KR))

#### Morning Session

- Shigeki Matsumoto (Kavli IPMU, U. Tokyo)

#### Morning Session

- Seong Chan Park (Yonsei University)

#### Morning Session

- Valentin Khoze (IPPP Durham University)

#### Morning Session

- Satoshi Shirai (Kavli IPMU)

#### Morning Session

- Frank Krauss (IPPP Durham)

#### Morning Session

- Jeonghyeon Song (Konkuk University)

#### Morning Session

- Myeonghun Park (Seoultech)

#### Morning Session

- Pyungwon Ko (KIAS)

We study the decay processes of mediator particles, which are predicted

in the light dark matter scenario, especially for the case in which their masses lie

near the threshold region. We consider a vector mediator particle as an example,

whose mass is around twice the muon or the bottom quark mass. We develop a

method to quantitatively deal with the threshold singularity of the decay...

The axion is one of the most promising dark matter candidates. Since

the axion is a very light particle, its quantum effects are very strong. For example,

the interaction between the axion dark matter and detectors is subject to large

corrections due to coherence effects and stimulated emission effects. In this talk I

will discuss how these quantum effects affect the direct detection of...

The early universe had such an extremely high energy density that

supermassive particles could have been produced. When heavy particles are pair

produced during inflation via couplings to the inflaton, the particle mass generates

a non-trivial curvature perturbation in position space. Even if the heavy particles no

longer exist, the modified curvature perturbations are preserved before...

We will discuss the various possibilities of beyond Standard Model

scenarios involving Type-I seesaw and Inverse seesaw mechanism. The B-L

gauge extension with a scalar dark matter scenario can have displaced decay

signature while the dark matter freeze-out is via right-handed neutrino pair. The

Type-X 2HDM is motivated to explain the muon (g-2) excess, if associated with the

right-handed...

Global non-topological solitons (Q-balls) exist when the potential of a

charged scalar field grows slower than quadratically. At zero temperature, this

requires attractive interactions. However, this is not necessary at finite

temperature, as the cubic term ~ T |phi|^3 generically has a negative coefficient.

As a result, non-topological solitons exist at finite temperature in a variety...

The two-Higgs-doublet model is one of the most studied BSM models.

The famous four types in the normal and inverted Higgs scenarios have different

still-allowed parameter spaces, which satisfy the theoretical requirements and the

experimental constraints at the electroweak scale. The high energy scale behavior

through the renormalization group equation analysis yields the cutoff scale of...