Superconducting Axion String and Cosmic Background Axion

• Hitoshi Murayama (University of California Berkeley (US))

Hierarchical axion couplings from axion landscape

• Kiwoon Choi

SU(2) Anomaly for DE Source

• Jihn E. Kim (Kyung Hee University)

I show a possibility that a quintessential axion (with its breaking by the weak SU(2) gauge anomaly) can be the source of dark energy. However, I cannot show why the minimum of the potential is at the zero value for the cosmological constant.

Axion-driven hybrid inflation over a barrier

• Kwang Sik Jeong

Extreme Testing of Self-Interacting Dark Matter

• Hai-Bo Yu (University of California, Riverside)

Cooling of young neutron stars and dark gauge bosons

• Deog Ki Hong (Pusan National University (KR))

The standard cooling scenario in the presence of nucleon superfluidity fits rather well to the observation of the neutron stars. It implies that the stellar cooling arguments could place a stringent constraint on the properties of novel particles. We study in particular the cooling rate induced by dark gauge bosons for very young neutron stars: remnants of Cassiopeia A and SN1987A. The cooling is dominantly contributed either by the nucleon pair breaking and formation in the core or by the electron bremsstrahlung in the crust, depending on the age of the stars and the form of the couplings. We compute how much the cooling curve of the young neutron stars could be modified by the extra dark gauge boson emission and obtain the bound for the dark gauge boson.

Dark Axion Portal

• Hye-Sung Lee (KAIST)

Hunting for New Physics in Neutrino Oscillation Experiments

• Joachim Kopp (CERN)

The goal of this phenomenology-oriented talk is to highlight some of the manifold ways in which neutrino oscillation experiments contribute to the global search for physics beyond the Standard Model. We will in particular discuss searches for sterile neutrinos (for which there exist some tantalizing but controversial hints), searches for new interactions in an effective field theory context, and searches for dark matter. Moreover, we will highlight the tremendous potential of neutrino "Near Detectors" for probing light and weakly interacting new particles. Throughout the talk, we will also highlight the Standard Model challenges that current and future neutrino oscillation experiments are facing, in particular with regard to precision prediction for neutrino-nucleus interactions.

Neutrino oscillations in a medium

• Eung Jin Chun (Korea Institute for Advanced Study)

New mechanism for baryon asymmetry and connection with dark matter

• Sin Kyu Kang (Seoul-Tech)

Fun with axions and axion strings

• Anson Hook (University of Maryland)

Exploring the Universe with Dark Light Scalars

• Chang Sub Shin (Institute for Basic Science )

Primordial Black Hole Domination: Dark Matter, Dark Radiation, and Gravitational Waves

• Gordan Krnjaic (Fermilab)

If even a relatively small number of primordial black holes (PBH) were created in the early universe, they will constitute an increasingly large fraction of the total energy density as space expands. It is thus well-motivated to consider scenarios in which the early universe was dominated by short lived PBH (M < 10^9 grams, t < 1 sec) whose Hawking radiation produces both the Standard Model radiation bath and other exotic gravitationally coupled species. Within this context, we consider Hawking radiation as a mechanism to produce dark radiation and dark matter. In a PBH dominated era, we find that Schwarzschild Hawking evaporation produces dark radiation at a level ΔNeff∼0.03−0.2 for each light and decoupled species of spin 0, 1/2, or 1. During this era, dark matter could also originate as Hawking radiation, although such dark matter candidates must be very heavy (m >10^11 GeV) to avoid overproduction. Furthermore, if the PBH undergo mergers before evaporating, the subsequent population acquires nonzero spin, so the resulting Kerr Hawking radiation efficiently produces gravitons whose contribution to ΔNeff is within the reach of future CMB experiments; such mergers also predict a characteristic spectrum of primordial gravitational waves at high frequencies correlated with the progenitor PBH mass.

Small-scale shear: Diffuse subhalos with gravitational waves

• Sunghoon Jung (Seoul National University)

Double Higgs production at the HL-LHC

• K.C. Kong (University of Kansas)

Search for BSM Higgs at the LHC

• Un-Ki Yang

Gapped Continuum Dark Matter

• Seung J. Lee (Korea University)

Higgs in the Swampland

• Nathaniel Craig (UC Santa Barbara)

Invertible LHC Simulations with Generative Networks

• Tilman Plehn

The weak scale as a trigger

• Hyung Do Kim (Seoul National University)

EFTs and Inflation

• Clifford Peter Burgess (McMaster University (CA))

Leptogenesis in Higgs inflation

• Seong Chan Park (Yonsei University)

Cosmological Particle Production and Pairwise Hotspots on the CMB

• Yuhsin Tsai (Fermilab/Cornell)

Quantum aspects of inflationary GWs

• Jinn-Ouk Gong

Inelastic DM models with Dark Higgs boson

• Pyungwon Ko (Korea Inst. for Advanced Study (KIAS))

Detecting Super-Light Dark Matter with Graphene Josephson Junction

• Jong-Chul Park

Dark matter particles and neutrinos with NaI(Tl) crystal detectors

• Chang Hyon Ha (Chung-Ang University)

Spontaneous breaking of Weyl quadratic gravity to Einstein action and inflation

• Dumitru Ghilencea (IFIN-HH (RO))

Toward waveform modelings for gravitational waves from black hole encountering

• Gungwon Kang (KISTI)