Workshop on Physics of Dark Cosmos: dark matter, dark energy, and all

Session

Student Session

22 Oct 2022, 20:00

Lavalse Hotel Busan 2F

Conveners

Student Session: 2

• Hang Bae Kim ()

Contribution list Timetable

64. FIMP dark matter from a hidden effective supersymmetric theory

Isnard Wanda

22/10/2022, 20:00

In this study, we present a dark matter model relying on hidden supersymmetric sectors such that dark matter particles are then decoupled from the SM. We will consider dark matter as massive bound states of gluons and gluinos called glueballs and gluinoballs. We will discuss the possibility to produce such dark matter particles with a freeze-in mechanism.

52. Revisit the gravitational lensing effect using radio wave polarization

Youngsub Yoon

22/10/2022, 20:15

Gravitational lensing effect analysis allows us to find the matter distribution in galactic clusters. For example, such an analysis at the Bullet Cluster suggested convincingly in favor of the existence of dark matter. However, in this analysis, it was assumed that the average of the original orientation of galaxies in a small patch of sky is zero. While this assumption is reasonable, it can...

53. Non-minimally assisted chaotic inflation

Sang Chul Hyun

22/10/2022, 20:30

Conventional wisdom says that a chaotic inflation model with a power-law potential is ruled out by the recent Planck-BICEP/Keck results. We find, however, that the model can be assisted by a non-minimally coupled scalar field and still provides a successful inflation. Considering a power-law chaotic inflation model of the type $V \sim \varphi^n$ with $n$ = {2, 4/3, 1, 2/3, 1/3}, we show that...

54. Primordial Black Holes and Gravitational Waves from the Tachyonic Instability in Higgs-$R^2$ Inflation

Dhong Yeon Cheong

22/10/2022, 20:45

The running of the Higgs self coupling may lead to numerous phenomena in early universe cosmology. In this paper we introduce a scenario where the Higgs running induces turns in the trajectory passing a region with tachyonic mass, leading to a temporal tachyonic growth in the curvature power spectrum. This effect induced by the Higgs leaves phenomena in the form of primordial black holes and...